Publications

NB use carefully: This list is updated regularly but may not be complete.

2021

Restored strange metal phase through suppression of charge density waves in underdoped YBa₂Cu₃O_{7–\(\delta\)}
E. Wahlberg, R. Arpaia, G. Seibold, M. Rossi, R. Fumagalli, E. Trabaldo, N. B. Brookes, L. Braicovich, S. Caprara, U. Gran, G. Ghiringhelli, T. Bauch, F. Lombardi
Science 373, 1506 (2021).  DOI

Charge Order at High Temperature in Cuprate Superconductors
R. Arpaia, G. Ghiringhelli
J. Phys. Soc. Jpn. 90, 111005 (2021).  DOI

Insight into the Temperature Evolution of Electronic Structure and Mechanism of Exchange Interaction in EuS
A. V. Fedorov, G. Poelchen, S. V. Eremeev, S. Schulz, A. Generalov, C. Polley, C. Laubschat, K. Kliemt, N. Kaya, C. Krellner, E. V. Chulkov, K. Kummer, D. Yu. Usachov, A. Ernst, D. V. Vyalikh
J. Phys. Chem. Lett. 12, 8328 (2021).  DOI

Resonant inelastic x-ray scattering study of doping and temperature dependence of low-energy excitations in La_1−xSr_xVO₃ thin films
K. Ruotsalainen, M. Gatti, J. M. Ablett, F. Yakhou-Harris, J.-P. Rueff, A. David, W. Prellier, A. Nicolaou
Phys. Rev. B 103, 235158 (2021).  DOI

Electronic structure and coexistence of superconductivity with magnetism in RbEuFe₄As₄
T. K. Kim, K. S. Pervakov, D. V. Evtushinsky, S. W. Jung, G. Poelchen, K. Kummer, V. A. Vlasenko, A. V. Sadakov, A. S. Usoltsev, V. M. Pudalov, D. Roditchev, V. S. Stolyarov, D. V. Vyalikh, V. Borisov, R. Valentí, A. Ernst, S. V. Eremeev, E. V. Chulkov
Phys. Rev. B 103, 174517 (2021).  DOI

Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds
D. Betto, R. Fumagalli, L. Martinelli, M. Rossi, R. Piombo, K. Yoshimi, D. Di Castro, E. Di Gennaro, A. Sambri, D. Bonn, G. A. Sawatzky, L. Braicovich, N. B. Brookes, J. Lorenzana, G. Ghiringhelli
Phys. Rev. B 103, L140409 (2021).  DOI

X-ray magnetic linear dichroism study of field-manipulated canted antiferromagnetism in epitaxial \(\alpha \)-Fe₂O₃ films
S. M. Suturin, A. M. Korovin, S. V. Gastev, P. A. Dvortsova, M. P. Volkov, M. Valvidares, N. S. Sokolov
Phys. Rev. Materials 5, 044408 (2021).  DOI

Visualizing the Kondo lattice crossover in YbRh₂Si₂ with Compton scattering
M. Güttler, K. Kummer, K. Kliemt, C. Krellner, S. Seiro, C. Geibel, C. Laubschat, Y. Kubo, Y. Sakurai, D. V. Vyalikh, A. Koizumi
Phys. Rev. B 103, 115126 (2021).  DOI

Crystalline and magnetic structure of Ba₂CuO_3+\(\delta\)  investigated by x-ray absorption spectroscopy and resonant inelastic x-ray scattering
R. Fumagalli, A. Nag, S. Agrestini, M. Garcia-Fernandez, A. C.Walters, D. Betto, N. B.Brookes, L. Braicovich, K.-J. Zhou, G. Ghiringhelli, M. Moretti Sala
Physica C 581, 1353810 (2021).  DOI

Correlation between crystal structure and magnetism in PLD grown epitaxial films of \(\epsilon\)-Fe₂O₃ on GaN
S. M. Suturin, A. M. Korovin, A. A. Sitnikova, D. A. Kirilenko, M. P. Volkov, P. A. Dvortsova, V. A. Ukleev, M. Tabuchi, N. S. Sokolov
Sci. Technol. Adv. Mater. 22, 85 (2021).  DOI

Charge Density Waves in YBa₂Cu₃O_6.67 Probed by Resonant X-Ray Scattering under Uniaxial Compression
H.-H. Kim, E. Lefrançois, K. Kummer, R. Fumagalli, N. B. Brookes, D. Betto, S. Nakata, M. Tortora, J. Porras, T. Loew, M. E. Barber, L. Braicovich, A. P. Mackenzie, C. W. Hicks, B. Keimer, M. Minola, M. Le Tacon
Phys. Rev. Lett. 126, 037002 (2021).  DOI

 

2020

Photoelectron diffraction for probing valency and magnetism of 4f-based materials: A view on valence-fluctuating EuIr₂Si₂
D. Yu. Usachov, A. V. Tarasov, S. Schulz, K. A. Bokai, I. I. Tupitsyn, G. Poelchen, S. Seiro, N. Caroca-Canales, K. Kliemt, M. Mende, K. Kummer, C. Krellner, M. Muntwiler, Hang Li, C. Laubschat, C. Geibel, E. V. Chulkov, S. I. Fujimori, D. V. Vyalikh
Phys. Rev. B 102, 205102 (2020).  DOI

Unexpected differences between surface and bulk spectroscopic and implied Kondo properties of heavy fermion CeRh₂Si₂
G. Poelchen, S. Schulz, M. Mende, M. Güttler, A. Generalov, A. V. Fedorov, N. Caroca-Canales, C. Geibel, K. Kliemt, C. Krellner, S. Danzenbächer, D. Yu. Usachov, P. Dudin, V. N. Antonov, J. W. Allen, C. Laubschat, K. Kummer, Yu. Kucherenko, D. V. Vyalikh
npj Quantum Materials 5, 70 (2020).  DOI

Spin waves in metallic iron and nickel measured by soft x-ray resonant inelastic scattering
N. B. Brookes, D. Betto, K. Cao, Yi Lu, K. Kummer, F. Giustino
Phys. Rev. B 102, 064412 (2020).  DOI

Deterministic control of an antiferromagnetic spin arrangement using ultrafast optical excitation
Y. W. Windsor, A. Ernst, K. Kummer, K. Kliemt, Ch. Schüßler-Langeheine, N. Pontius, U. Staub, E. V. Chulkov, C. Krellner, D. V. Vyalikh, L. Rettig
Communications Physics 3, 139 (2020).  DOI

Damping of spinful excitons in LaCoO₃ by thermal fluctuations: Theory and experiment
A. Hariki, R.-P. Wang, A. Sotnikov, K. Tomiyasu, D. Betto, N. B. Brookes, Y. Uemura, M. Ghiasi, F. M. F. de Groot, J. Kuneš
Phys. Rev. B 101, 245162 (2020).  DOI

Unusual Dynamic Charge Correlations in Simple-Tetragonal HgBa₂CuO_4+\(\delta\)
B. Yu, W. Tabis, I. Bialo, F. Yakhou, N. B. Brookes, Z. Anderson, Y. Tang, G. Yu, M. Greven
Phys. Rev. X 10, 021059 (2020).  DOI

Spin structure of spin-orbit split surface states in a magnetic material revealed by spin-integrated photoemission
D. Yu. Usachov, M. Güttler, S. Schulz, G. Poelchen, S. Seiro, K. Kliemt, K. Kummer, C. Krellner, C. Laubschat, E. V. Chulkov, D. V. Vyalikh
Phys. Rev. B 101, 245140 (2020).  DOI

Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials
D. Yu. Usachov, I. A. Nechaev, G. Poelchen, M. Güttler, E. E. Krasovskii, S. Schulz, A. Generalov, K. Kliemt, A. Kraiker, C. Krellner, K. Kummer, S. Danzenbächer, C. Laubschat, A. P. Weber, J. Sánchez-Barriga, E. V. Chulkov, A. F. Santander-Syro, T. Imai, K. Miyamoto, T. Okuda, D. V. Vyalikh
Phys. Rev. Lett. 124, 237202 (2020).  DOI

Strain and electric field control of the orbital and spin order in multiferroic BiMnO₃
G. M. De Luca, C. A. Perroni, R. Di Capua, V. Cataudella, F. Chiarella, M. Minola, N. B. Brookes, M. Salluzzo, G. Ghiringhelli 
Eur. Phys. J. Plus 135, 473 (2020).  DOI

Determining the electron-phonon coupling in superconducting cuprates by resonant inelastic x-ray scattering: Methods and results on Nd_1+xBa_2−xCu₃O_{7−\(\delta\)}
L. Braicovich, M. Rossi, R. Fumagalli, YY. Peng, Y. Wang, R. Arpaia, D. Betto, G. M. De Luca, D. Di Castro, K. Kummer, M. Moretti Sala, M. Pagetti, G. Balestrino, N. B. Brookes, M. Salluzzo, S. Johnston, J. van den Brink, G. Ghiringhelli
Phys. Rev. Research 2, 023231 (2020).  DOI

Enhanced Magnetism through Oxygenation of FePc/Ag(110) Monolayer Phases
E. Bartolomé, J. Bartolomé, F. Sedona, J. Lobo-Checa, D. Forrer, J. Herrero-Albillos, M. Piantek, J. Herrero-Martín, D. Betto, E. Velez-Fort, L. M. García, M. Panighel, A. Mugarza, M. Sambi, F. Bartolomé
J. Phys. Chem. C 124, 13993 (2020).  DOI

Mobile orbitons in Ca₂CuO₃: Crucial role of Hund's exchange
R. Fumagalli, J. Heverhagen, D. Betto, R. Arpaia, M. Rossi, D. Di Castro, N. B. Brookes, M. Moretti Sala, M. Daghofer, L. Braicovich, K. Wohlfeld, G. Ghiringhelli
Phys. Rev. B 101, 205117 (2020).  DOI

High-Temperature Charge-Stripe Correlations in La_1.675Eu_0.2Sr_0.125CuO₄
Qisi Wang, M. Horio, K. von Arx, Y. Shen, D. John Mukkattukavil, Y. Sassa, O. Ivashko, C.E. Matt, S. Pyon, T. Takayama, H. Takagi, T. Kurosawa, N. Momono, M. Oda, T. Adachi, S.M. Haidar, Y. Koike, Y. Tseng, W. Zhang, J. Zhao, K. Kummer, M. Garcia-Fernandez, Ke-Jin Zhou, N.B. Christensen, H.M. Ronnow, T. Schmitt, J. Chang
Phys. Rev. Lett. 124, 187002 (2020).  DOI

X-ray Magnetic Circular Dichroism at the ESRF: Present Capabilities and New Possibilities
A. Rogalev, F. Wilhelm, K. Kummer, N. B. Brookes
Synchrotron Radiation News 33, 30 (2020).  DOI

Unconventional Spin Relaxation Involving Localized Vibrational Modes in Ho Single-Atom Magnets
F. Donati, S. Rusponi, S. Stepanow, L. Persichetti, A. Singha, D. M. Juraschek, C. Wäckerlin, R. Baltic, M. Pivetta, K. Diller, C. Nistor, J. Dreiser, K. Kummer, E. Velez-Fort, N. A. Spaldin, H. Brune, P. Gambardella
Phys. Rev. Lett. 124, 077204 (2020).  DOI

 

2019

Formation of Incommensurate Charge Density Waves in Cuprates
H. Miao, R. Fumagalli, M. Rossi, J. Lorenzana, G. Seibold, F. Yakhou-Harris, K. Kummer, N. B. Brookes, G. D. Gu, L. Braicovich, G. Ghiringhelli, M. P. M. Dean
Phys. Rev. X 9, 031042 (2019).  DOI

Anisotropic damping and wave vector dependent susceptibility of the spin fluctuations in La_2−xSr_xCuO₄ studied by resonant inelastic x-ray scattering
H. C. Robarts, M. Barthélemy, K. Kummer, M. García-Fernández, J. Li, A. Nag, A. C. Walters, K. J. Zhou, S. M. Hayden
Phys. Rev. B 100, 214510 (2019).  DOI

High-resolution soft X-ray resonant inelastic X-ray scattering
N. B. Brookes
In: E. Jaeschke, S. Khan, J. R. Schneider, J. B. Hastings (eds), "Synchrotron Light Sources and Free-Electron Lasers", Springer (2019).  DOI

Extreme biomimetics: Preservation of molecular detail in centimeter-scale samples of biological meshes laid down by sponges
I. Petrenko, A. P. Summers, P. Simon, S Zoltowska-Aksamitowska, M. Motylenko, C. Schimpf, D. Rafaja, F. Roth, K. Kummer, E. Brendler, O. S. Pokrovsky, R. Galli, M. Wysokowski, H.  Meissner, E. Niederschlag, Y. Joseph, S. L. Molodtsov, A. Ereskovsky, V. Sivkov, S. Nekipelov, O. Petrova, O. Volkova, M. Bertau, M. Kraft, A. Rogalev, M. Kopani, T. Jesionowski, H. Ehrlich
Sci. Adv. 5, eaax2805 (2019).  DOI

Resonant inelastic x-ray scattering investigation of the crystal-field splitting of Sm³⁺ in SmB₆
A. Amorese, O. Stockert, K. Kummer, N. B. Brookes, D.-J. Kim, Z. Fisk, M. W. Haverkort, P. Thalmeier, L. H. Tjeng, A. Severing
Phys. Rev. B 100, 241107(R) (2019).  DOI

Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-T_c superconductor
R. Arpaia, S. Caprara, R. Fumagalli, G. De Vecchi, Y. Y. Peng, E. Andersson, D. Betto, G. M. De Luca, N. B. Brookes, F. Lombardi, M. Salluzzo, L. Braicovich, C. Di Castro, M. Grilli, G. Ghiringhelli
Science 365, 906 (2019).  DOI

Magnetic properties of on-surface synthesized single-ion molecular magnets
K. Diller, A. Singha, M. Pivetta, C. Wäckerlin, R. Hellwig, A. Verdini, A. Cossaro, L. Floreano, E. Vélez-Fort, J. Dreiser, S. Rusponi, H. Brune
RSC Advances 9, 34421 (2019).  DOI

Origin of two-dimensional electronic states at Si- and Gd-terminated surfaces of GdRh₂Si₂
A. Yu. Vyazovskaya, M. M. Otrokov, Yu. M. Koroteev, K. Kummer, M. Güttler, D. V. Vyalikh, E. V. Chulkov
Phys. Rev. B 100, 075140 (2019).  DOI

Vanadyl phthalocyanines on graphene/SiC(0001): toward a hybrid architecture for molecular spin qubits
I. Cimatti, L. Bondì, G. Serrano, L. Malavolti, B. Cortigiani, E. Velez-Fort, D. Betto, A. Ouerghi, N. B. Brookes, S. Loth, M. Mannini, F. Totti, R. Sessoli
Nanoscale Horizons 4, 1202 (2019).  DOI

Charge, lattice and magnetism across the valence crossover in EuIr₂Si₂ single crystals
S. Seiro, Yu. Prots, K. Kummer, H. Rosner, R. Cardoso Gil, C. Geibel
J. Phys.: Condens. Matter 31, 305602 (2019).  DOI

Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
M. Rossi, R. Arpaia, R. Fumagalli, M. Moretti Sala, D. Betto, K. Kummer, G. M. De Luca, J. van den Brink, M. Salluzzo, N. B. Brookes, L. Braicovich, G. Ghiringhelli
Phys. Rev. Lett. 123, 027001 (2019).  DOI

Emerging 2D-ferromagnetism and strong spin-orbit coupling at the surface of valence-fluctuating EuIr₂Si₂
S. Schulz, I. A. Nechaev, M. Güttler, G. Poelchen, A. Generalov, S. Danzenbächer, A. Chikina, S. Seiro, K. Kliemt, A. Yu. Vyazovskaya, T. K. Kim, P. Dudin, E. V. Chulkov, C. Laubschat, E. E. Krasovskii, C. Geibel, C. Krellner, K. Kummer, D. V. Vyalikh
npj Quantum Materials 4, 26 (2019).   DOI

Metamagnetic texture in a polar antiferromagnet
D. A. Sokolov, N. Kikugawa, T. Helm, H. Borrmann, U. Burkhardt, R. Cubitt, J. S. White, E. Ressouche, M. Bleuel, K. Kummer, A. P. Mackenzie, U. K. Rößler
Nature Physics 15, 671 (2019).   DOI

Resonant inelastic x-ray scattering study of bond order and spin excitations in nickelate thin-film structures
K. Fürsich, Y. Lu, D. Betto, M. Bluschke, J. Porras, E. Schierle, R. Ortiz, H. Suzuki, G. Cristiani, G. Logvenov, N. B. Brookes, M. W. Haverkort, M. Le Tacon, E. Benckiser, M. Minola, B. Keimer
Phys. Rev. B 99, 165124 (2019).   DOI

Polarization-resolved Cu L₃-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa₂Cu₃O_7-δ
R. Fumagalli, L. Braicovich, M. Minola, Y. Y. Peng, K. Kummer, D. Betto, M. Rossi, E. Lefrançois, C. Morawe, M. Salluzzo, H. Suzuki, F. Yakhou, M. Le Tacon, B. Keimer, N. B. Brookes, M. Moretti Sala, G. Ghiringhelli
Phys. Rev. B 99, 134517 (2019).   DOI

Divalent EuRh₂Si₂ as a reference for the Luttinger theorem and antiferromagnetism in trivalent heavy-fermion YbRh₂Si₂
M. Güttler, A. Generalov, S. I. Fujimori, K. Kummer, A. Chikina, S. Seiro, S. Danzenbächer, Yu. M. Koroteev, E. V. Chulkov, M. Radovic, M. Shi, N. C. Plumb, C. Laubschat, J. W. Allen, C. Krellner, C. Geibel, D. V. Vyalikh
Nature Comm. 10, 796 (2019).   DOI

Enhanced spatial resolution of commercial soft X-ray CCD detectors by single-photon centroid reconstruction
A. Amorese, C. Langini, G.Dellea, K. Kummer, N. B. Brookes, L. Braicovich, G. Ghiringhelli
Nucl. Instrum. Methods A (2019).   DOI

Europium Cyclooctatetraene Nanowire Carpets: A Low-Dimensional, Organometallic, and Ferromagnetic Insulator
F. Huttmann, N. Rothenbach, S. Kraus, K. Ollefs, L. M. Arruda , M. Bernien, D. Thonig, A. Delin, J. Fransson, K. Kummer, N. B. Brookes, O. Eriksson, W. Kuch, T. Michely, H. Wende
J. Phys. Chem. Lett. 10, 911 (2019).  DOI

Paramagnon dispersion in β-FeSe observed by Fe L-edge resonant inelastic x-ray scattering
M. C. Rahn, K. Kummer, N. B. Brookes, A. A. Haghighirad, K. Gilmore, A. T. Boothroyd
Phys. Rev. B 99, 014505 (2019).  DOI

 

2018

Depth-resolved resonant inelastic x-ray scattering at a superconductor/half-metallic-ferromagnet interface through standing wave excitation
C.-T. Kuo, S.-C. Lin, G. Ghiringhelli, Y.Y. Peng, G. M. De Luca, D. Di Castro, D. Betto, M. Gehlmann, T. Wijnands, M. Huijben, J. Meyer-Ilse, E. Gullikson, J. B. Kortright, A. Vailionis, N. Gauquelin, J. Verbeeck, T. Gerber, G. Balestrino, N. B. Brookes, L. Braicovich, C. S. Fadley
Phys. Rev. B 98, 235146 (2018).   DOI

Probing the energy gap of high-temperature cuprate superconductors by resonant inelastic x-ray scattering
H. Suzuki, M. Minola, Y. Lu, Y.Y. Peng, R. Fumagalli, E. Lefrançois, T. Loew, J. Porras, K. Kummer, D. Betto, S. Ishida, H. Eisaki, C. Hu, X. Zhou, M. W. Haverkort, N. B. Brookes, L. Braicovich, G. Ghiringhelli, M. Le Tacon, and B. Keimer
npj Quantum Materials 3, 65 (2018).  DOI

Three-dimensional collective charge excitations in electron-doped copper oxide superconductors
M. Hepting, L. Chaix, E. W. Huang, R. Fumagalli, Y. Y. Peng, B. Moritz, K. Kummer, N. B. Brookes, W. C. Lee, M. Hashimoto, T. Sarkar, J.-F. He, C. R. Rotundu, Y. S. Lee, R. L. Greene, L. Braicovich, G. Ghiringhelli, Z. X. Shen, T. P. Devereaux, W. S. Lee
Nature 563, 374 (2018).  DOI

The beamline ID32 at the ESRF for soft X-ray high energy resolution resonant inelastic X-ray scattering and polarization dependent X-ray absorption spectroscopy
N.B. Brookes, F. Yakhou-Harris, K. Kummer, A. Fondacaro, J.C. Cezar,D. Betto, E. Velez-Fort, A. Amorese, G. Ghiringhelli, L. Braicovich, R. Barrett, G. Berruyer, F.Cianciosi, L. Eybert, P. Marion, P. van der Linden, L. Zhang
Nucl. Instrum. Methods A 903, 175 (2018).  DOI

Coupling between dynamic magnetic and charge-order correlations in the cuprate superconductor Nd_2−xCe_xCuO₄
E. H. da Silva Neto, M. Minola, B. Yu, W. Tabis, M. Bluschke, D. Unruh, H. Suzuki, Y. Li, G. Yu, D. Betto, K. Kummer, F. Yakhou, N. B. Brookes, M. Le Tacon, M. Greven, B. Keimer, A. Damascelli
Phys. Rev. B 98, 161114(R) (2018).  DOI

Dispersion, damping, and intensity of spin excitations in the monolayer (Bi,Pb)2(Sr,La)2CuO6+δ cuprate superconductor family
Y. Y. Peng, E. W. Huang, R. Fumagalli, M. Minola, Y. Wang, X. Sun, Y. Ding, K. Kummer, X. J. Zhou, N. B. Brookes, B. Moritz, L. Braicovich, T. P. Devereaux, G. Ghiringhelli
Phys. Rev. B 98, 144507 (2018).  DOI

Symmetry breaking at the (111) interfaces of SrTiO₃ hosting a two-dimensional electron system
G. M. De Luca, R. Di Capua, E. Di Gennaro, A. Sambri, F. Miletto Granozio, G. Ghiringhelli, D. Betto, C. Piamonteze, N. B. Brookes, M. Salluzzo
Phys. Rev. B 98, 115143 (2018).  DOI

Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator
P. Rüßmann, S. K. Mahatha, P. Sessi, M. A. Valbuena, T. Bathon, K. Fauth, S. Godey, A. Mugarza, K. A. Kokh, O. E. Tereshchenko, P. Gargiani, M. Valvidares, E. Jiménez, N. B Brookes, M. Bode, G. Bihlmayer, S. Blügel, P. Mavropoulos, C. Carbone, A. Barla
Journal of Physics: Materials 1, 015002 (2018).  link

Determining the local low-energy excitations in the Kondo semimetal CeRu₄Sn₆ using resonant inelastic x-ray scattering
A. Amorese, K. Kummer, N. B. Brookes, O. Stockert, D. T. Adroja, A. M. Strydom, A. Sidorenko, H. Winkler, D. A. Zocco, A. Prokofiev, S. Paschen, M. W. Haverkort, L. H. Tjeng, A. Severing
Phys. Rev. B 98, 081116(R) (2018).  link

Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering
Y. Lu, D. Betto, K. Fürsich, H. Suzuki, H.-H. Kim, G. Cristiani, G. Logvenov, N. B. Brookes, E. Benckiser, M. W. Haverkort, G. Khaliullin, M. Le Tacon, M. Minola, and B. Keimer
Phys. Rev. X 8, 031014 (2018).  link

Electronic Structure and Enhanced Charge-Density Wave Order of Monolayer VSe₂
J. Feng, D. Biswas, A. Rajan, M. D. Watson, F. Mazzola, O. J. Clark, K. Underwood, I. Markovict, M. McLaren, A. Hunter, D. M. Burn, L. B. Duffy, S. Barua, G. Balakrishnan, F. Bertran, P. Le Fevre, T. K. Kim, G. van der Laan, T. Hesjedal , P. Wahl , P. D. C. King
Nano Lett. 18, 4493 (2018).  link

Crystal electric field in CeRh₂Si₂ studied with high-resolution resonant inelastic soft x-ray scattering
A. Amorese, N. Caroca-Canales, S. Seiro, C. Krellner, G. Ghiringhelli, N. B. Brookes, D. V. Vyalikh, C. Geibel, K. Kummer
Phys. Rev. B 97, 245130 (2018).  link

Re-entrant charge order in overdoped (Bi,Pb)_2.12Sr_1.88CuO_6+δ outside the pseudogap regime
Y. Y. Peng, R. Fumagalli, Y. Ding, M. Minola, S. Caprara, D. Betto, M. Bluschke, G. M. De Luca, K. Kummer, E. Lefrançois, M. Salluzzo, H. Suzuki, M. Le Tacon, X. J. Zhou, N. B. Brookes, B. Keimer, L. Braicovich, M. Grilli, G. Ghiringhelli
Nature Materials 17, 697 (2018).  link

Microscopic effects of Dy doping in the topological insulator Bi₂Te₃
L. B. Duffy, N.-J. Steinke, J. A. Krieger, A. I. Figueroa, K. Kummer, T. Lancaster, S. R. Giblin, F. L. Pratt, S. J. Blundell, T. Prokscha, A. Suter, S. Langridge, V. N. Strocov, Z. Salman, G. van der Laan, T. Hesjedal
Phys. Rev. B 97, 174427 (2018).  link

Systematics of electronic and magnetic properties in the transition metal doped Sb₂Te₃ quantum anomalous Hall platform
M. F. Islam, C. M. Canali, A. Pertsova, A. Balatsky, S. K. Mahatha, C. Carbone, A. Barla, K. A. Kokh, O. E. Tereshchenko, E. Jiménez, N. B. Brookes, P. Gargiani, M. Valvidares, S. Schatz, T. R. F. Peixoto, H. Bentmann, F. Reinert, J. Jung, T. Bathon, K. Fauth, M. Bode, P. Sessi
Phys. Rev. B 97, 155429 (2018).  link

Evolution of ground-state wave function in CeCoIn₅ upon Cd or Sn doping
K. Chen, F. Strigari, M. Sundermann, Z. Hu, Z. Fisk, E. D. Bauer, P. F. S. Rosa, J. L. Sarrao, J. D. Thompson, J. Herrero-Martin, E. Pellegrin, D. Betto, K. Kummer, A. Tanaka, S. Wirth, A. Severing
Phys. Rev. B 97, 045134  (2018).  link

Magnetic bistability of a TbPc₂ submonolayer on a graphene/SiC(0001) conductive electrode
G. Serrano, E. Velez-Fort, I. Cimatti, B. Cortigiani, L. Malavolti, D. Betto, A. Ouerghi, N. B. Brookes, M. Mannini, R. Sessoli
Nanoscale 10, 2715 (2018).  link

Probing magnetic coupling between LnPc₂ (Ln = Tb, Er) molecules and the graphene/Ni (111) substrate with and without Au-intercalation: role of the dipolar field
V. Corradini, A. Candini, D. Klar, R. Biagi, V. De Renzi, A. Lodi Rizzini, N. Cavani, U. del Pennino, S. Klyatskaya, M. Ruben, E. Velez-Fort, K. Kummer, N. B. Brookes, P. Gargiani, H. Wende, M. Affronte
Nanoscale 10, 277 (2018).  link

 

2017

High-temperature charge density wave correlations in La_1.875Ba_0.125CuO₄ without spin–charge locking
H. Miao, J. Lorenzana, G. Seibold, Y. Y. Peng, A. Amorese, F. Yakhou-Harris, K. Kummer, N. B. Brookes, R. M. Konik, V. Thampy, G. D. Gu, G. Ghiringhelli, L. Braicovich, M. P. M. Dean
PNAS 114, 12430 (2017).  link

Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
Y. Y. Peng, G. Dellea, M. Minola, M. Conni, A. Amorese, D. Di Castro, G. M. De Luca, K. Kummer, M. Salluzzo, X. Sun, X. J. Zhou, G. Balestrino, M. Le Tacon, B. Keimer, L. Braicovich, N. B. Brookes, G. Ghiringhelli
Nature Physics 13, 1201 (2017).  link

Three-dimensional dispersion of spin waves measured in NiO by resonant inelastic x-ray scattering
D. Betto, Y. Y. Peng, S. B. Porter, G. Berti, A. Calloni, G. Ghiringhelli, and N. B. Brookes
Phys. Rev. B 96, 020409(R) (2017).  link

Structure, site-specific magnetism, and magnetotransport properties of epitaxial D0₂₂-structure Mn₂Fe_xGa thin films
D. Betto, Y.-C. Lau, K. Borisov, K. Kummer, N. B. Brookes, P. Stamenov, J. M. D. Coey, K. Rode
Phys. Rev. B  96, 024408 (2017).  link

Dispersive charge density wave excitations in Bi₂Sr₂CaCu₂O_8+δ
L. Chaix, G. Ghiringhelli, Y. Y. Peng, M. Hashimoto, B. Moritz, K. Kummer, N. B. Brookes, Y. He, S. Chen, S. Ishida, Y. Yoshida, H. Eisaki, M. Salluzzo, L. Braicovich, Z.-X. Shen, T. P. Devereaux, W.-S. Lee
Nature Physics 13, 952 (2017).  link

Magnetic proximity coupling to Cr-doped Sb₂Te₃ thin films
L. B. Duffy, A. I. Figueroa, Ł. Gładczuk, N.-J. Steinke, K. Kummer, G. van der Laan, and T. Hesjedal
Phys. Rev. B 95, 224422 (2017).  link

Valence and spin-state transition in cobaltates revisited by x-ray magnetic circular dichroism
F. Guillou, K. Kummer, Y. Bréard, L. Hervé, and V. Hardy
Phys. Rev. B 95, 174445 (2017).  link

Low-Temperature Magnetic Force Microscopy on Single Molecule Magnet-Based Microarrays
M. Serri, M. Mannini, L. Poggini, E. Vélez-Fort, B. Cortigiani, P. Sainctavit, D. Rovai, A. Caneschi, R. Sessoli
Nano Lett. 17, 1899 (2017).  link

RixsToolBox: software for the analysis of soft X-ray RIXS data acquired with 2D detectors
K. Kummer, A. Tamborrino, A. Amorese, M. Minola, L. Braicovich, N. B. Brookes, G. Ghiringhelli
Journal of Synchrotron Radiation 24,  531 (2017).  DOI

GdRh₂Si₂: An exemplary tetragonal system for antiferromagnetic order with weak in-plane anisotropy
K. Kliemt, M. Hofmann-Kliemt, K. Kummer, F. Yakhou-Harris, C. Krellner, and C. Geibel
Phys. Rev. B 95, 134403 (2017).  link

X-ray magnetic circular dichroism study of Dy-doped Bi₂Te₃ topological insulator thin films
A. I. Figueroa, A. A. Baker, S. E. Harrison, K. Kummer, G. van der Laan, T. Hesjedal
Journal of Magnetism and Magnetic Materials 422, 93 (2017).  link

 

2016

Direct observation of charge order in underdoped and optimally doped Bi₂(Sr,La)₂CuO_6+δ by resonant inelastic x-ray scattering
Y. Y. Peng, M. Salluzzo, X. Sun, A. Ponti, D. Betto, A. M. Ferretti, F. Fumagalli, K. Kummer, M. Le Tacon, X. J. Zhou, N. B. Brookes, L. Braicovich, and G. Ghiringhelli
Phys. Rev. B 94, 184511 (2016).  link

X-ray absorption and emission spectroscopy study of Mn and Co valence and spin states in TbMn_1−xCo_xO₃
V. Cuartero, S. Lafuerza, M. Rovezzi, J. García, J. Blasco, G. Subías, E. Jiménez
Phys. Rev. B 94, 155117 (2016).  link

Time-resolved imaging of magnetic vortex dynamics using holography with extended reference autocorrelation by linear differential operator
N. Bukin, C. McKeever, E. Burgos-Parra, P. S. Keatley, R. J. Hicken, F. Y. Ogrin, G. Beutier, M. Dupraz, H. Popescu, N. Jaouen, F. Yakhou-Harris, S. A. Cavill, G. van der Laan
Scientific Reports 6, 36307 (2016).  link

Molecular Order in Buried Layers of TbPc₂ Single-Molecule Magnets Detected by Torque Magnetometry
M. Perfetti, M. Serri, L. Poggini, M. Mannini, D. Rovai, P. Sainctavit, S. Heutz, R. Sessoli
Advanced Materials 28,  6946 (2016).  link

Magnetic remanence in single atoms
F. Donati, S. Rusponi, S. Stepanow, C. Wäckerlin, A. Singha, L. Persichetti, R. Baltic, K. Diller, F. Patthey, E. Fernandes, J. Dreiser, Ž. Šljivančanin, K. Kummer, C. Nistor, P. Gambardella, H. Brune
Science 352, 318 (2016).  link

The high-field magnet endstation for X-ray magnetic dichroism experiments at ESRF soft X-ray beamline ID32
K. Kummer, A. Fondacaro, E. Jimenez, E. Velez-Fort, A. Amorese, M. Aspbury, F. Yakhou-Harris, P. van der Linden, N. B. Brookes
Journal of Synchrotron Radiation 23,  464 (2016).  DOI

Robust and tunable itinerant ferromagnetism at the silicon surface of the antiferromagnet GdRh₂Si₂
M. Güttler, A. Generalov, M. M. Otrokov, K. Kummer, K. Kliemt, A. Fedorov, A. Chikina, S. Danzenbächer, S. Schulz, E. V. Chulkov, Yu. M. Koroteev, N. Caroca-Canales, M. Shi, M. Radovic, C. Geibel, C. Laubschat, P. Dudin, T. K. Kim, M. Hoesch, C. Krellner, D. V. Vyalikh
Scientific Reports 6, 24254 (2016).  link

 

2015

X-ray magnetic circular dichroism on La_2/3Ca_1/3Mn_0.97Fe_0.03O₃ thin films
A. I. Figueroa, G. E. Campillo, A. A. Baker, J. A. Osorio, O. L. Arnache, G. van der Laan
Superlattices and Microstructures 87, 42 (2015).  link

Magnetic proximity-enhanced Curie temperature of Cr-doped Bi₂Se₃ thin films
A. A. Baker, A. I. Figueroa, K. Kummer, L. J. Collins-McIntyre, T. Hesjedal, G. van der Laan
Phys. Rev. B 92, 094420 (2015).  link