0467694 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Vondráček, Martin - Cornils, L. - Minár, J. - Warmuth, J. - Michiardi, M. - Piamonteze, C. - Barreto, L. - Miwa, J.A. - Bianchi, M. - Hofmann, Ph. - Zhou, L. - Kamlapure, A. - Khajetoorians, A.A. - Wiesendanger, R. - Mi, J.L. - Iversen, B. B. - Mankovsky, S. - Borek, S. - Ebert, H. - Schüler, M. - Wehling, T. - Wiebe, J. - Honolka, Jan
Nickel: the time-reversal symmetry conserving partner of iron on a chalcogenide topological insulator.
Physical Review B. Roč. 94, č. 16 (2016), s. 1-5, č. článku 161114. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR(CZ) GA14-30062S; GA AV ČR(CZ) Fellowship J. E. Purkyně; GA MŠMT LO1409; GA MŠMT(CZ) LM2011029
Grant ostatní: AV ČR(CZ) Fellowship J. E. Purkyně
Program: Fellowship J. E. Purkyně
Institucionální podpora: RVO:68378271
Klíčová slova: surface * dichroism * beamline
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.836, rok: 2016 ; AIS: 1.227, rok: 2016
DOI: https://doi.org/10.1103/PhysRevB.94.161114

We report on the quenching of single Ni adatom moments on Te-terminated Bi2Te2Se and Bi2Te3 topological insulator surfaces. The effect is noted as a missing x-ray magnetic circular dichroism for resonant L3,2 transitions into partially filled Ni 3d states of theory-derived occupancy nd = 9.2. On the basis of a comparative study of Ni and Fe using scanning tunneling microscopy and ab initio calculations, we are able to relate the element specific moment formation to a local Stoner criterion. Our theory shows that while Fe adatoms form large spin moments of ms = 2.54μ B with out-of-plane anisotropy due to a sufficiently large density of states at the Fermi energy, Ni remains well below an effective Stoner threshold for local moment formation.

Trvalý link: http://hdl.handle.net/11104/0265745