All Questions
Tagged with topological-insulators topological-phase
98
questions
6
votes
2
answers
2k
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Topological insulator vs. topological superconductors in any dimension
My question today is simple. What is the difference between a topological insulator and a topological superconductor? How that difference depends on the dimensionality of space(time)? What is the ...
- 6,611
5
votes
0
answers
256
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Topolgical insulators order parameter
For topological insulators
Is there any way to define order parameter for topological phase transitions?
- 331
6
votes
1
answer
2k
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$Z_2$ topological insulator: odd vs. even number of edge state pairs
I am having trouble in understanding why in $Z_2$ topological insulators odd number of Kramers' pairs on one edge are protected by time reversal symmetry against elastic backscattering while even ...
- 1,566
6
votes
1
answer
2k
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Kane and Mele's argument on the existence of edge states in quantum spin Hall effect of graphene
Borrowing from Laughlin's argument on quantum Hall effect, Kane and Mele argued why there must be edge states in graphene with spin-orbit coupling in one paragraph, which is above the one with ...
- 1,566
9
votes
1
answer
2k
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Jordan Wigner Transformation in 1d Majorana chain
So, I was reading the paper by Fidkowski and Kitaev on 1d fermionic phase http://arxiv.org/abs/1008.4138. It explains the classification of 1d fermionic SPT phases with $\mathbb{Z}_2^T$ symmetry for ...
- 733
11
votes
2
answers
6k
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Is band-inversion a 'necessary and sufficient' condition for Topological Insulators?
According to my naive understanding of topological insulators, an inverted band strucure in the bulk (inverted with respect to the vaccum/trivial insulator surrounding it) implies the existence of a ...
4
votes
1
answer
803
views
Vortices and chemical potential in topological superconductors
I am trying to read up some review articles about Majorana physics in topological material, but I am not really familiar with the condensed matter terminology (with condensed matter in general I ...
- 649
1
vote
0
answers
318
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Finding parity eigenvalues from a character table
The all-electron code Wien2K will optionally calculate the character tables for a specified list of $k$-points. I'd like to know the parity eigenvalue for a given $k$-point and band index. Is there ...
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