@article{MTMT:34749016, title = {Real-space nonlocal Gilbert damping from exchange torque correlation applied to bulk ferromagnets and their surfaces}, url = {https://m2.mtmt.hu/api/publication/34749016}, author = {Nagyfalusi, Balázs and Szunyogh, László and Palotás, Krisztián}, doi = {10.1103/PhysRevB.109.094417}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {109}, unique-id = {34749016}, issn = {2469-9950}, year = {2024}, eissn = {2469-9969}, orcid-numbers = {Palotás, Krisztián/0000-0002-1914-2901} } @article{MTMT:34749006, title = {Chemical potential of magnetic skyrmion quasiparticles in heavy-metal/iron bilayers}, url = {https://m2.mtmt.hu/api/publication/34749006}, author = {Nagyfalusi, Balázs and Udvardi, László and Szunyogh, László and Rózsa, Levente}, doi = {10.1103/PhysRevB.109.094418}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {109}, unique-id = {34749006}, issn = {2469-9950}, year = {2024}, eissn = {2469-9969}, orcid-numbers = {Rózsa, Levente/0000-0001-9456-5755} } @article{MTMT:33887288, title = {Search for large topological gaps in atomic spin chains on proximitized superconducting heavy-metal layers}, url = {https://m2.mtmt.hu/api/publication/33887288}, author = {Beck, P. and Nyári, Bendegúz Tamás and Schneider, L. and Rózsa, Levente and Lászlóffy, András and Palotás, Krisztián and Szunyogh, László and Ujfalussy, Balázs and Wiebe, J. and Wiesendanger, R.}, doi = {10.1038/s42005-023-01196-y}, journal-iso = {COMM PHYS}, journal = {COMMUNICATIONS PHYSICS}, volume = {6}, unique-id = {33887288}, issn = {2399-3650}, year = {2023}, eissn = {2399-3650}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995; Rózsa, Levente/0000-0001-9456-5755; Palotás, Krisztián/0000-0002-1914-2901} } @article{MTMT:34011109, title = {Magnetic properties of hematite revealed by an ab initio parameterized spin model}, url = {https://m2.mtmt.hu/api/publication/34011109}, author = {Dannegger, Tobias and Deák, András and Rózsa, Levente and Galindez-Ruales, E. and Das, Shubhankar and Baek, Eunchong and Klaeui, Mathias and Szunyogh, László and Nowak, Ulrich}, doi = {10.1103/PhysRevB.107.184426}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {107}, unique-id = {34011109}, issn = {2469-9950}, abstract = {Hematite is a canted antiferromagnetic insulator, promising for applications in spintronics. Here we present ab initio calculations of the tensorial exchange interactions of hematite and use them to understand its magnetic properties by parametrizing a semiclassical Heisenberg spin model. Using atomistic spin dynamics simulations, we calculate the equilibrium properties and phase transitions of hematite, most notably the Morin transition. The computed isotropic and Dzyaloshinskii-Moriya interactions result in a Neel temperature and weak ferromagnetic canting angle that are in good agreement with experimental measurements. Our simulations show how dipoledipole interactions act in a delicate balance with first and higher-order on-site anisotropies to determine the material's magnetic phase. Comparison with spin-Hall magnetoresistance measurements on a hematite single crystal reveals deviations of the critical behavior at low temperatures. Based on a mean-field model, we argue that these differences result from the quantum nature of the fluctuations that drive the phase transitions.}, keywords = {neutron-diffraction; WEAK FERROMAGNETISM; Materials Science, Multidisciplinary; Physics, Applied; BASAL-PLANE}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Deák, András/0000-0002-3210-2947; Rózsa, Levente/0000-0001-9456-5755} } @article{MTMT:34069735, title = {Classification of Yu-Shiba-Rusinov states of magnetic impurities on superconducting surfaces: A fully relativistic first-principles study}, url = {https://m2.mtmt.hu/api/publication/34069735}, author = {Lászlóffy, András and Nyári, Bendegúz Tamás and Szunyogh, László and Park, K. and Ujfalussy, Balázs}, doi = {10.1103/PhysRevB.107.224515}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {107}, unique-id = {34069735}, issn = {2469-9950}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:34394425, title = {Topological superconductivity from first principles. II. Effects from manipulation of spin spirals: Topological fragmentation, braiding, and quasi-Majorana bound states}, url = {https://m2.mtmt.hu/api/publication/34394425}, author = {Lászlóffy, András and Nyári, Bendegúz Tamás and Csire, Gábor and Szunyogh, László and Ujfalussy, Balázs}, doi = {10.1103/PhysRevB.108.134513}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {108}, unique-id = {34394425}, issn = {2469-9950}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Lászlóffy, András/0000-0001-9863-3647; Nyári, Bendegúz Tamás/0000-0001-5524-9995; Ujfalussy, Balázs/0000-0003-3338-4699} } @article{MTMT:34470105, title = {Relativistic magnetic interactions from nonorthogonal basis sets}, url = {https://m2.mtmt.hu/api/publication/34470105}, author = {Martínez-Carracedo, G. and Oroszlány, László and García-Fuente, A. and Nyári, Bendegúz Tamás and Udvardi, László and Szunyogh, László and Ferrer, J.}, doi = {10.1103/PhysRevB.108.214418}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {108}, unique-id = {34470105}, issn = {2469-9950}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Oroszlány, László/0000-0001-5682-6424; Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:33644685, title = {Electrically driven singlet-triplet transition in triangulene spin-1 chains}, url = {https://m2.mtmt.hu/api/publication/33644685}, author = {Martínez-Carracedo, Gabriel and Oroszlány, László and García-Fuente, Amador and Szunyogh, László and Ferrer, Jaime}, doi = {10.1103/PhysRevB.107.035432}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {107}, unique-id = {33644685}, issn = {2469-9950}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Oroszlány, László/0000-0001-5682-6424} } @article{MTMT:34394419, title = {Topological superconductivity from first principles. I. Shiba band structure and topological edge states of artificial spin chains}, url = {https://m2.mtmt.hu/api/publication/34394419}, author = {Nyári, Bendegúz Tamás and Lászlóffy, András and Csire, Gábor and Szunyogh, László and Ujfalussy, Balázs}, doi = {10.1103/PhysRevB.108.134512}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {108}, unique-id = {34394419}, issn = {2469-9950}, year = {2023}, eissn = {2469-9969}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995; Ujfalussy, Balázs/0000-0003-3338-4699} } @article{MTMT:33728446, title = {Effects of strong spin-orbit coupling on Shiba states from magnetic adatoms using first-principles theory}, url = {https://m2.mtmt.hu/api/publication/33728446}, author = {Park, K. and Nyári, Bendegúz Tamás and Lászlóffy, András and Szunyogh, László and Ujfalussy, Balázs}, doi = {10.1088/1367-2630/acc1ff}, journal-iso = {NEW J PHYS}, journal = {NEW JOURNAL OF PHYSICS}, volume = {25}, unique-id = {33728446}, issn = {1367-2630}, year = {2023}, eissn = {1367-2630}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:33156870, title = {Incommensurate magnetic ordering in CrB2}, url = {https://m2.mtmt.hu/api/publication/33156870}, author = {Deák, András and Jackson, J. and Nyári, Bendegúz Tamás and Szunyogh, László}, doi = {10.1088/1361-648X/ac94b0}, journal-iso = {J PHYS CONDENS MAT}, journal = {JOURNAL OF PHYSICS-CONDENSED MATTER}, volume = {34}, unique-id = {33156870}, issn = {0953-8984}, year = {2022}, eissn = {1361-648X}, orcid-numbers = {Deák, András/0000-0002-3210-2947; Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:32643405, title = {Reply to "comment on 'Proper and improper chiral magnetic interactions' "}, url = {https://m2.mtmt.hu/api/publication/32643405}, author = {dos Santos Dias, M and Brinker, S. and Lászlóffy, András and Nyári, Bendegúz Tamás and Blügel, S. and Szunyogh, László and Lounis, S.}, doi = {10.1103/PhysRevB.105.026402}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {105}, unique-id = {32643405}, issn = {2469-9950}, year = {2022}, eissn = {2469-9969}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:32775067, title = {Coexistence of antiferromagnetism and superconductivity in Mn/Nb(110)}, url = {https://m2.mtmt.hu/api/publication/32775067}, author = {Lo Conte, R. and Bazarnik, M. and Palotás, Krisztián and Rózsa, Levente and Szunyogh, László and Kubetzka, A. and Von Bergmann, K. and Wiesendanger, R.}, doi = {10.1103/PhysRevB.105.L100406}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {105}, unique-id = {32775067}, issn = {2469-9950}, year = {2022}, eissn = {2469-9969}, orcid-numbers = {Palotás, Krisztián/0000-0002-1914-2901; Rózsa, Levente/0000-0001-9456-5755} } @article{MTMT:33041619, title = {Magnetic ground state of supported monatomic Fe chains from first principles}, url = {https://m2.mtmt.hu/api/publication/33041619}, author = {Nagyfalusi, Balázs and Udvardi, László and Szunyogh, László}, doi = {10.1088/1361-648X/ac8260}, journal-iso = {J PHYS CONDENS MAT}, journal = {JOURNAL OF PHYSICS-CONDENSED MATTER}, volume = {34}, unique-id = {33041619}, issn = {0953-8984}, abstract = {A new computational scheme is presented based on a combination of the conjugate gradient and the Newton-Raphson method to self-consistently minimize the energy within local spin-density functional theory, thus to identify the ground state magnetic order of a finite cluster of atoms. The applicability of the new ab initio optimization method is demonstrated for Fe chains deposited on different metallic substrates. The optimized magnetic ground states of the Fe chains on Rh(111) are analyzed in details and a good comparison is found with those obtained from an extended Heisenberg model containing first principles based interaction parameters. Moreover, the effect of the different bilinear spin-spin interactions in the formation of the magnetic ground states is monitored. In case of Fe chains on Nb(110) spin-spiral configurations with opposite rotational sense are found as compared to previous spin-model results which hints on the importance of higher order chiral interactions. The wavelength of the spin-spiral states of Fe chains on Re(0001) was obtained in good agreement with scanning tunneling microscopy experiments.}, keywords = {DENSITY; Ab initio; FERROMAGNETISM; SKYRMION LATTICE; Magnetic nanoclusters}, year = {2022}, eissn = {1361-648X} } @article{MTMT:32923926, title = {Current-induced switching of antiferromagnetic order in Mn2Au from first principles}, url = {https://m2.mtmt.hu/api/publication/32923926}, author = {Selzer, Severin and Salemi, Leandro and Deák, András and Simon, Eszter and Szunyogh, László and Oppeneer, Peter M. and Nowak, Ulrich}, doi = {10.1103/PhysRevB.105.174416}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {105}, unique-id = {32923926}, issn = {2469-9950}, abstract = {It is well established that it is possible to switch certain antiferromagnets electrically, yet the interplay of Neel-spin-orbit torques and thermal activation is only poorly understood. Combining ab initio calculations and atomistic spin dynamics simulations we develop a multiscale model to study the current-induced switching in Mn2Au. We compute from first principles the strength and direction of the electrically induced magnetic moments, caused by the Rashba-Edelstein effect, and take these into account in atomistic spin dynamics simulations. Our simulations reveal the switching paths as well as the timescales for switching. The size of the induced moments, however, turns out to be insufficient to lead to fully deterministic switching. Instead, we find that a certain degree of thermal activation is required to help overcome the relevant energy barrier.}, keywords = {Materials Science, Multidisciplinary; Physics, Applied}, year = {2022}, eissn = {2469-9969}, orcid-numbers = {Deák, András/0000-0002-3210-2947} } @article{MTMT:32008881, title = {Element‐Specific Magnetization Damping in Ferrimagnetic DyCo 5 Alloys Revealed by Ultrafast X‐ray Measurements}, url = {https://m2.mtmt.hu/api/publication/32008881}, author = {Abrudan, Radu and Hennecke, Martin and Radu, Florin and Kachel, Torsten and Holldack, Karsten and Mitzner, Rolf and Donges, Andreas and Khmelevskyi, Sergii and Deák, András and Szunyogh, László and Nowak, Ulrich and Eisebitt, Stefan and Radu, Ilie}, doi = {10.1002/pssr.202100047}, journal-iso = {PHYS STATUS SOLIDI-R}, journal = {PHYSICA STATUS SOLIDI - RAPID RESEARCH LETTERS}, volume = {15}, unique-id = {32008881}, issn = {1862-6254}, year = {2021}, eissn = {1862-6270}, orcid-numbers = {Deák, András/0000-0002-3210-2947; Radu, Ilie/0000-0001-8503-3503} } @article{MTMT:31960740, title = {Spin-orbit coupling induced splitting of Yu-Shiba-Rusinov states in antiferromagnetic dimers}, url = {https://m2.mtmt.hu/api/publication/31960740}, author = {Beck, P and Schneider, L and Rózsa, Levente and Palotás, Krisztián and Lászlóffy, András and Szunyogh, László and Wiebe, J and Wiesendanger, R}, doi = {10.1038/s41467-021-22261-6}, journal-iso = {NAT COMMUN}, journal = {NATURE COMMUNICATIONS}, volume = {12}, unique-id = {31960740}, issn = {2041-1723}, year = {2021}, eissn = {2041-1723}, orcid-numbers = {Rózsa, Levente/0000-0001-9456-5755; Palotás, Krisztián/0000-0002-1914-2901} } @article{MTMT:32025792, title = {Proper and improper chiral magnetic interactions}, url = {https://m2.mtmt.hu/api/publication/32025792}, author = {dos Santos Dias, M. and Brinker, S. and Lászlóffy, András and Nyári, Bendegúz Tamás and Blügel, S. and Szunyogh, László and Lounis, S.}, doi = {10.1103/PhysRevB.103.L140408}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {103}, unique-id = {32025792}, issn = {2469-9950}, year = {2021}, eissn = {2469-9969}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995} } @article{MTMT:32169176, title = {Electronic and magnetic properties of building blocks of mn and fe atomic chains on nb(110)}, url = {https://m2.mtmt.hu/api/publication/32169176}, author = {Lászlóffy, András and Palotás, Krisztián and Rózsa, Levente and Szunyogh, László}, doi = {10.3390/nano11081933}, journal-iso = {NANOMATERIALS-BASEL}, journal = {NANOMATERIALS}, volume = {11}, unique-id = {32169176}, year = {2021}, eissn = {2079-4991}, orcid-numbers = {Palotás, Krisztián/0000-0002-1914-2901; Rózsa, Levente/0000-0001-9456-5755} } @article{MTMT:32575599, title = {Relativistic first-principles theory of Yu-Shiba-Rusinov states applied to Mn adatoms and Mn dimers on Nb(110)}, url = {https://m2.mtmt.hu/api/publication/32575599}, author = {Nyári, Bendegúz Tamás and Lászlóffy, András and Szunyogh, László and Csire, G and Park, K and Ujfalussy, Balázs}, doi = {10.1103/PhysRevB.104.235426}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {104}, unique-id = {32575599}, issn = {2469-9950}, abstract = {We present a fully relativistic first-principles-based theoretical approach for the calculation of the spectral properties of magnetic impurities on the surface of a superconducting substrate, providing a material specific framework for the investigation of the Yu-Shiba-Rusinov (YSR) states. By using a suitable orbital decomposition of the local densities of states we discuss in great detail the formation of the YSR states for an Mn adatom and for two kinds of Mn dimers placed on the Nb(110) surface and compare our results to recent experimental findings. In the case of the adatom we find that the spin-orbit coupling slightly shifts some of the YSR peaks and also the local spin polarization on the Nb atoms has marginal effects on their positions. Moreover, by scaling the exchange field on the Mn site we could explain the lack of the dx(2)-y(2)-like YSR state in the spectrum. While our results for a close packed ferromagnetic dimer are in satisfactory agreement with the experimentally observed splitting of the YSR states, in the case of an antiferromagnetic dimer we find that the spin-orbit coupling is not sufficiently large to explain the splitting of the YSR states seen in the experiment. Changing the relative orientation of the magnetic moments in this dimer induces splitting of the YSR states and also shifts their energy, leading even to the formation of a zero bias peak in the case of the deepest YSR state.}, keywords = {SUPERCONDUCTOR}, year = {2021}, eissn = {2469-9969}, orcid-numbers = {Nyári, Bendegúz Tamás/0000-0001-5524-9995} }