Dirac versus Weyl Fermions in Topological Insulators: Adler-Bell-Jackiw Anomaly in Transport Phenomena
SCIE
SCOPUS
- Title
- Dirac versus Weyl Fermions in Topological Insulators: Adler-Bell-Jackiw Anomaly in Transport Phenomena
- Authors
- Kim, HJ; Kim, KS; Wang, JF; Sasaki, M; Satoh, N; Ohnishi, A; Kitaura, M; Yang, M; Li, L
- Date Issued
- 2013-12-10
- Publisher
- AMERICAN PHYSICAL SOCIETY
- Abstract
- Dirac metals (gapless semiconductors) are believed to turn into Weyl metals when perturbations, which break either time reversal symmetry or inversion symmetry, are employed. However, no experimental evidence has been reported for the existence of Weyl fermions in three dimensions. Applying magnetic fields near the topological phase transition from a topological insulator to a band insulator in Bi-1 - Sb-x(x) we observe not only the weak antilocalization phenomenon in magnetoconductivity near zero magnetic fields (B< 0.4 T), but also its upturn above 0.4 T only for E/ / B B. This "incompatible'' coexistence between weak antilocalization and "negative'' magnetoresistivity is attributed to the Adler-Bell-Jackiw anomaly ("topological'' E . B term) in the presence of weak antilocalization corrections.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12512
- DOI
- 10.1103/PHYSREVLETT.111.246603
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 111, no. 24, page. 246603-1 - 246603-5, 2013-12-10
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.