| SANCHEZ-BARRIGA, J., A. VARYKHALOV, G. SPRINGHOLZ, H. STEINER, R. KIRCHSCHLAGER, G. BAUER, Ondřej CAHA, E. SCHIERLE, E. WESCHKE, A. A. UENAL, S. VALENCIA, M. DUNST, J. BRAUN, H. EBERT, J. MINAR, E. GOLIAS, L. V. YASHINA, A. NEY, Václav HOLÝ and O. RADER. Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1-xMnx)(2)Se-3. Nature Communications. London: Nature Publishing Group, 2016, vol. 7, February, p. nestránkováno, 10 pp. ISSN 2041-1723. Available from: https://dx.doi.org/10.1038/ncomms10559. |
Other formats:
BibTeX
LaTeX
RIS
@article{1373358,
author = {SanchezandBarriga, J. and Varykhalov, A. and Springholz, G. and Steiner, H. and Kirchschlager, R. and Bauer, G. and Caha, Ondřej and Schierle, E. and Weschke, E. and Uenal, A. A. and Valencia, S. and Dunst, M. and Braun, J. and Ebert, H. and Minar, J. and Golias, E. and Yashina, L. V. and Ney, A. and Holý, Václav and Rader, O.},
article_location = {London},
article_number = {February},
doi = {http://dx.doi.org/10.1038/ncomms10559},
keywords = {SURFACE; FERROMAGNETISM; TRANSITION; GA1-XMNXAS; FERMIONS},
language = {eng},
issn = {2041-1723},
journal = {Nature Communications},
title = {Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1-xMnx)(2)Se-3},
url = {http://www.nature.com/articles/ncomms10559},
volume = {7},
year = {2016}
}
TY - JOUR
ID - 1373358
AU - Sanchez-Barriga, J. - Varykhalov, A. - Springholz, G. - Steiner, H. - Kirchschlager, R. - Bauer, G. - Caha, Ondřej - Schierle, E. - Weschke, E. - Uenal, A. A. - Valencia, S. - Dunst, M. - Braun, J. - Ebert, H. - Minar, J. - Golias, E. - Yashina, L. V. - Ney, A. - Holý, Václav - Rader, O.
PY - 2016
TI - Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1-xMnx)(2)Se-3
JF - Nature Communications
VL - 7
IS - February
SP - nestránkováno
EP - nestránkováno
PB - Nature Publishing Group
SN - 20411723
KW - SURFACE
KW - FERROMAGNETISM
KW - TRANSITION
KW - GA1-XMNXAS
KW - FERMIONS
UR - http://www.nature.com/articles/ncomms10559
L2 - http://www.nature.com/articles/ncomms10559
N2 - Magnetic doping is expected to open a band gap at the Dirac point of topological insulators by breaking time-reversal symmetry and to enable novel topological phases. Epitaxial (Bi1-xMnx)(2)Se-3 is a prototypical magnetic topological insulator with a pronounced surface band gap of similar to 100 meV. We show that this gap is neither due to ferromagnetic order in the bulk or at the surface nor to the local magnetic moment of the Mn, making the system unsuitable for realizing the novel phases. We further show that Mn doping does not affect the inverted bulk band gap and the system remains topologically nontrivial. We suggest that strong resonant scattering processes cause the gap at the Dirac point and support this by the observation of in-gap states using resonant photoemission. Our findings establish a mechanism for gap opening in topological surface states which challenges the currently known conditions for topological protection.
ER -
SANCHEZ-BARRIGA, J., A. VARYKHALOV, G. SPRINGHOLZ, H. STEINER, R. KIRCHSCHLAGER, G. BAUER, Ondřej CAHA, E. SCHIERLE, E. WESCHKE, A. A. UENAL, S. VALENCIA, M. DUNST, J. BRAUN, H. EBERT, J. MINAR, E. GOLIAS, L. V. YASHINA, A. NEY, Václav HOLÝ and O. RADER. Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1-xMnx)(2)Se-3. \textit{Nature Communications}. London: Nature Publishing Group, 2016, vol.~7, February, p.~nestránkováno, 10 pp. ISSN~2041-1723. Available from: https://dx.doi.org/10.1038/ncomms10559.
|
