|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Electronic orders in multi-orbital Hubbard models with lifted orbital degeneracy | | Shintaro Hoshino
; Philipp Werner
; | | Date: |
19 Feb 2016 | | Abstract: | We study the symmetry-broken phases in two- and three-orbital Hubbard models
with lifted orbital degeneracy using dynamical mean field theory. On the
technical level, we explain how symmetry relations can be exploited to measure
the four-point correlation functions needed for the calculation of the lattice
susceptibilities. In the half-filled two-orbital model with crystal field
splitting, we find an instability of the metallic phase to spin-orbital order
with neither spin nor orbital moment. This ordered phase is shown to be related
to the recently discovered fluctuating-moment induced spin-triplet
superconducting state in the orbitally degenerate model with shifted chemical
potential. In the three-orbital case, we consider the effect of a crystal field
splitting on the spin-triplet superconducting state in the model with positive
Hund coupling, and the spin-singlet superconducting state in the case of
negative Hund coupling. It is demonstrated that for certain crystal field
splittings the higher energy orbitals instead of the lower ones are relevant
for superconductivity, and that $T_c$ can be enhanced by the crystal field
effect. We comment on the implications of our results for the superconductivity
in strontium ruthenates, and for the recently reported light-enhanced
superconducting state in alkali-doped fullerides. | | Source: | arXiv, 1602.6054 | | 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 Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER