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ID 33916
file
creator
Kuroda, Kenta
Miyahara, Hirokazu
Ye, Mao
Eremeev, S. V.
Koroteev, Yu. M.
Krasovskii, E. E.
Chulkov, E. V.
Hiramoto, Shozo
Arita, Masashi
Ueda, Yoshifumi
NDC
Physics
abstract
The experimental evidence is presented of the topological insulator state in PbBi2Te4. A single surface Dirac cone is observed by angle-resolved photoemission spectroscopy with synchrotron radiation. Topological invariants Z2 are calculated from the ab initio band structure to be 1;(111). The observed two-dimensional isoenergy contours in the bulk energy gap are found to be the largest among the known three-dimensional topological insulators. This opens a pathway to achieving a sufficiently large spin current density in future spintronic devices.
journal title
Physical Review Letters
volume
Volume 108
issue
Issue 20
start page
206803
date of issued
2012
publisher
American Physical Society
issn
0031-9007
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
(c) 2012 American Physical Society
relation url
department
Graduate School of Science
Hiroshima Synchrotron Radiation Center