TY - JOUR AU - Tóth, Boglárka AU - Farkas, Dániel Gergely AU - Amelin, K. AU - Rõõm, T. AU - Nagel, U. AU - Udvardi, László AU - Szunyogh, László AU - Rózsa, Levente AU - Ito, T. AU - Bordács, Sándor TI - Terahertz spin-wave excitations in the transverse conical phase of BiFeO3 JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 109 PY - 2024 IS - 14 PG - 10 SN - 2469-9950 DO - 10.1103/PhysRevB.109.144424 UR - https://m2.mtmt.hu/api/publication/34823661 ID - 34823661 N1 - Department of Physics, Institute of Physics, Budapest University of Technology and Economics, Muegyetem rakpart 3, Budapest, H-1111, Hungary National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, Tallinn, 12618, Estonia Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Muegyetem rakpart 3, Budapest, H-1111, Hungary HUN-REN-BME Condensed Matter Physics Research Group, Budapest University of Technology and Economics, Muegyetem rakpart 3, Budapest, H-1111, Hungary Department of Theoretical Solid State Physics, Institute for Solid State Physics and Optics, HUN-REN Wigner Research Centre for Physics, Budapest, H-1525, Hungary National Institute of Advanced Industrial Science and Technology, Ibaraki, Tsukuba, 305-8562, Japan Experimental Physics v, Center for Electronic Correlations and Magnetism, University of Augsburg, Augsburg, D-86135, Germany Export Date: 10 May 2024 Funding details: Eesti Teadusagentuur, ETAg, PRG736 Funding details: NKM2022-27/2023, NKM 2018-47, NKM 2021-24 Funding details: 2022-2.1.1-NL-2022-00004 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, K 131938, FK 135003, K 142652, FK 142601 Funding details: European Regional Development Fund, ERDF, TK134 Funding details: Magyar Tudományos Akadémia, MTA, BO/00178/23/11 Funding text 1: We thank R.S. Fishman for discussions. The authors acknowledge the support of the bilateral program of the Estonian and Hungarian Academies of Sciences under Contracts No. NKM 2018-47, No. NKM 2021-24, and No. NKM2022-27/2023. We acknowledge support from Estonian Research Council Grant No. PRG736 and European Regional Development Fund Project No. TK134. This research was supported by the Ministry of Culture and Innovation and the National Research, Development and Innovation Office within the Quantum Information National Laboratory of Hungary (Grant No. 2022-2.1.1-NL-2022-00004). This work was supported by the Hungarian National Research, Development and Innovation Office (NKFIH Grants No. FK 135003, No. K 131938, No. K 142652, and No. FK 142601), as well as by the Hungarian Academy of Sciences via a J\\u00E1nos Bolyai Research Grant (Grant No. BO/00178/23/11). LA - English DB - MTMT ER - TY - JOUR AU - Nagyfalusi, Balázs AU - Szunyogh, László AU - Palotás, Krisztián TI - Real-space nonlocal Gilbert damping from exchange torque correlation applied to bulk ferromagnets and their surfaces JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 109 PY - 2024 IS - 9 PG - 8 SN - 2469-9950 DO - 10.1103/PhysRevB.109.094417 UR - https://m2.mtmt.hu/api/publication/34749016 ID - 34749016 LA - English DB - MTMT ER - TY - JOUR AU - Nagyfalusi, Balázs AU - Udvardi, László AU - Szunyogh, László AU - Rózsa, Levente TI - Chemical potential of magnetic skyrmion quasiparticles in heavy-metal/iron bilayers JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 109 PY - 2024 IS - 9 PG - 9 SN - 2469-9950 DO - 10.1103/PhysRevB.109.094418 UR - https://m2.mtmt.hu/api/publication/34749006 ID - 34749006 LA - English DB - MTMT ER - TY - JOUR AU - Martínez-Carracedo, G. AU - Oroszlány, László AU - García-Fuente, A. AU - Nyári, Bendegúz Tamás AU - Udvardi, László AU - Szunyogh, László AU - Ferrer, J. TI - Relativistic magnetic interactions from nonorthogonal basis sets JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 108 PY - 2023 IS - 21 PG - 18 SN - 2469-9950 DO - 10.1103/PhysRevB.108.214418 UR - https://m2.mtmt.hu/api/publication/34470105 ID - 34470105 LA - English DB - MTMT ER - TY - JOUR AU - Lászlóffy, András AU - Nyári, Bendegúz Tamás AU - Csire, Gábor AU - Szunyogh, László AU - Ujfalussy, Balázs TI - Topological superconductivity from first principles. II. Effects from manipulation of spin spirals: Topological fragmentation, braiding, and quasi-Majorana bound states JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 108 PY - 2023 IS - 13 PG - 11 SN - 2469-9950 DO - 10.1103/PhysRevB.108.134513 UR - https://m2.mtmt.hu/api/publication/34394425 ID - 34394425 LA - English DB - MTMT ER - TY - JOUR AU - Nyári, Bendegúz Tamás AU - Lászlóffy, András AU - Csire, Gábor AU - Szunyogh, László AU - Ujfalussy, Balázs TI - Topological superconductivity from first principles. I. Shiba band structure and topological edge states of artificial spin chains JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 108 PY - 2023 IS - 13 PG - 11 SN - 2469-9950 DO - 10.1103/PhysRevB.108.134512 UR - https://m2.mtmt.hu/api/publication/34394419 ID - 34394419 LA - English DB - MTMT ER - TY - JOUR AU - Lászlóffy, András AU - Nyári, Bendegúz Tamás AU - Szunyogh, László AU - Park, K. AU - Ujfalussy, Balázs TI - Classification of Yu-Shiba-Rusinov states of magnetic impurities on superconducting surfaces: A fully relativistic first-principles study JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 107 PY - 2023 IS - 22 PG - 8 SN - 2469-9950 DO - 10.1103/PhysRevB.107.224515 UR - https://m2.mtmt.hu/api/publication/34069735 ID - 34069735 LA - English DB - MTMT ER - TY - JOUR AU - Dannegger, Tobias AU - Deák, András AU - Rózsa, Levente AU - Galindez-Ruales, E. AU - Das, Shubhankar AU - Baek, Eunchong AU - Klaeui, Mathias AU - Szunyogh, László AU - Nowak, Ulrich TI - Magnetic properties of hematite revealed by an ab initio parameterized spin model JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 107 PY - 2023 IS - 18 PG - 11 SN - 2469-9950 DO - 10.1103/PhysRevB.107.184426 UR - https://m2.mtmt.hu/api/publication/34011109 ID - 34011109 N1 - Export Date: 08 March 2024 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Beck, P. AU - Nyári, Bendegúz Tamás AU - Schneider, L. AU - Rózsa, Levente AU - Lászlóffy, András AU - Palotás, Krisztián AU - Szunyogh, László AU - Ujfalussy, Balázs AU - Wiebe, J. AU - Wiesendanger, R. TI - Search for large topological gaps in atomic spin chains on proximitized superconducting heavy-metal layers JF - COMMUNICATIONS PHYSICS J2 - COMM PHYS VL - 6 PY - 2023 IS - 1 PG - 10 SN - 2399-3650 DO - 10.1038/s42005-023-01196-y UR - https://m2.mtmt.hu/api/publication/33887288 ID - 33887288 LA - English DB - MTMT ER - TY - JOUR AU - Park, K. AU - Nyári, Bendegúz Tamás AU - Lászlóffy, András AU - Szunyogh, László AU - Ujfalussy, Balázs TI - Effects of strong spin-orbit coupling on Shiba states from magnetic adatoms using first-principles theory JF - NEW JOURNAL OF PHYSICS J2 - NEW J PHYS VL - 25 PY - 2023 IS - 3 PG - 19 SN - 1367-2630 DO - 10.1088/1367-2630/acc1ff UR - https://m2.mtmt.hu/api/publication/33728446 ID - 33728446 LA - English DB - MTMT ER -