SUPERCONDUCTIVITY NEAR POMERANCHUK INSTABILITIES IN THE SPIN CHANNEL
| Autor: | Daniel G. Barci, Paulo S. A. Bonfim |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Superconductivity
Physics Coupling constant Angular momentum Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences Statistical and Nonlinear Physics Condensed Matter Physics Instability Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Metastability Phase space Phase (matter) Phase diagram |
| Zdroj: | Modern Physics Letters B. 27:1350102 |
| ISSN: | 1793-6640 0217-9849 |
| Popis: | We study the competition between a Pomeranchuk instability in the spin channel with angular momentum $\ell=1$ and an attractive interaction, favoring Cooper-pair formation. We found that the superconducting gap strongly suppresses the phase space for the Pomeranchuk instability. We computed a mean-field phase diagram displaying a first order transition between two superconductor phases with different symmetries: p-wave (with spontaneously generated spin-orbit interaction) and s-wave for greater values of the coupling constant. Moreover, we have looked for a possible modulated superconducting phase. We have found that this phase appears only as a meta-stable state in the strong coupling regime. Comment: 12 pages, 2 figures, paper greatly improved, intra-band interactions added, phase diagram (Fig. 1) changed. To appear in MPLB |
| Databáze: | OpenAIRE |
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