|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Unconventional superconductivity in low density electron systems and conventional superconductivity in hydrogen metallic alloys under pressure | | Maxim Yu. Kagan
; | | Date: |
26 Apr 2016 | | Abstract: | In a short review-article we first discuss the results, which are mainly
devoted to the generalizations of the famous Kohn-Luttinger mechanism of
superconductivity in purely repulsive fermion systems at low electron
densities. In the context of repulsive-U Hubbard model and Shubin-Vonsovsky
model we consider detaily the superconducting phase diagrams and the symmetries
of the order parameter in novel strongly correlated electron systems including
iron based superconductors and idealized monolayer and bilayer graphene. We
stress that purely repulsive fermion systems are mainly the subject of
unconventional low-temperature superconductivity. To get the high temperature
superconductivity in cuprates (with T-c of the order of 100 K ) we should
consider t - J model with the Van der Waals interaction potential and the
competition between short-range repulsion and long-range attraction. Finally we
stress that to describe superconductivity in metallic hydrogen alloys under
pressure (with T-c of the order of 200K) it is reasonable to reexamine more
conventional mechanisms connected with electron-phonon interaction. This can be
done in the framework of the attractive-U Hubbard model with static onsite or
intersite attractive potential or more realistic theories (which include
retardation effects) such as Migdal-Eliashberg strong coupling theory or even
Fermi-Bose mixture theory of Alexandrov, Ranninger. | | Source: | arXiv, 1604.7583 | | 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