Topological insulator homojunctions including magnetic layers: the example of n-p type (n-QLs Bi.sub.2./sub.Se.sub.3./sub./Mn-Bi.sub.2./sub.Se.sub.3./sub.) heterostructures

0473845 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Vališka, M. - Warmuth, J. - Michiardi, M. - Vondráček, Martin - Ngankeu, A.S. - Holý, V. - Sechovský, V. - Springholz, G. - Bianchi, M. - Wiebe, J. - Hofmann, P. - Honolka, Jan
Topological insulator homojunctions including magnetic layers: the example of n-p type (n-QLs Bi₂Se₃/Mn-Bi₂Se₃) heterostructures.
Applied Physics Letters. Roč. 108, č. 26 (2016), 1-4, č. článku 262402. ISSN 0003-6951. E-ISSN 1077-3118
Grant CEP: GA AV ČR(CZ) Fellowship J. E. Purkyně; GA MŠMT(CZ) LM2011029; GA MŠMT LO1409; GA ČR(CZ) GA14-30062S
Grant ostatní: AV ČR(CZ) Fellowship J. E. Purkyně
Program: Fellowship J. E. Purkyně
Institucionální podpora: RVO:68378271
Klíčová slova: topological insulator * Mn-Bi2Se₃ * homojunction * ARPES
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.411, rok: 2016

Homojunctions between Bi2Se3 and its Mn-doped phase are investigated as a sample geometry to study the influence of spin degrees of freedom on topological insulator properties. n quintuple layers of Bi2Se3 are grown on top of Mn-doped Bi2Se3 by molecular beam epitaxy for 0 <= n <= 30 QLs, allowing to unhamperedly monitor the development of electronic and topological properties by surface sensitive techniques like angle resolved photoemission spectroscopy. With increasing n, a Mn-induced gap at the Dirac point is gradually filled in an “hourglass” fashion to reestablish a topological surface state at n similar to 9 QLs.
Trvalý link: http://hdl.handle.net/11104/0270972