Ordering mechanism and quantum anomalous Hall effect of magnetically doped topological insulators
Journal Article
·
· Physical Review B
- Univ. of California, Irvine, CA (United States)
- Pohang Univ. of Science and Technology (POSTECH) (Korea)
- Univ. of Texas, Austin, TX (United States)
We investigate magnetic ordering and the quantum anomalous Hall effect (QAHE) in Cr-doped topological insulators using systematic first-principles calculations, explaining the mechanism responsible for ferromagnetic order and the reason why Sb2Te3 is a better QAHE host than Bi2Se3 or Bi2Te3. In this work, we conclude that these magnetic topological insulators have relatively long-range exchange interactions within quintuple layers and weak interactions between quintuple layers. Our analyses for the spin splitting of the topological surface states suggest that the temperature at which the QAHE occurs in these materials can be enhanced significantly by Mo-Cr co-doping.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation of Korea (NRF); Welch Foundation
- Grant/Contract Number:
- SC0012670; 2011-0030046; TBF1473
- OSTI ID:
- 1470134
- Alternate ID(s):
- OSTI ID: 1404740
- Journal Information:
- Physical Review B, Vol. 96, Issue 14; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 22 works
Citation information provided by
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