| | |
| | |
Stat |
Members: 3643 Articles: 2'488'730 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
The thermal Hall conductance of a symmetry-breaking topological insulator | Zi-Xiang Li
; Dung-Hai Lee
; | Date: |
10 May 2019 | Abstract: | In this note we point out that a model proposed by Hsu, Raghu and
Chakravarty[1] has the potential to explain the unusual thermal Hall effect
reported in Ref.[2]. This model describes a topological insulator that breaks
the spin rotation and point group symmetries. But it preserves the
time-reversal symmetry. This insulator possesses staggered spin current loops.
Like the spin Hall insulator, it exhibits helical edge modes, which are
protected by the time reversal and/or the U(1) spin rotation around the
symmetry-breaking axis. These edge modes conduct heat, and in the presence of a
magnetic field produce a thermal Hall conductivity $kappa_{xy}/T$, which
increases monotonically with magnetic field. Nonetheless the electric Hall
conductance is zero. Like the quantum spin Hall insulator, there should be
non-zero spin Hall and quantized two-terminal electrical conductances. The
helical edge modes persist in the presence of the Neel order, so long as the
latter is not too strong. Upon charge doping the system becomes a metal with
Fermi pockets. However, the edge states persist hence their thermal transport
properties remain. | Source: | arXiv, 1905.4248 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |