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Theory of unconventional superconductivity in strongly correlated systems : real space pairing and statistically consistent mean-field theory : in perspective
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Theory of unconventional superconductivity in strongly correlated systems : real space pairing and statistically consistent mean-field theory : in perspective
Bibliographic description
| title: | Theory of unconventional superconductivity in strongly correlated systems : real space pairing and statistically consistent mean-field theory : in perspective |
| author: | Spałek Józef 
|
| journal title: | Acta Physica Polonica. A |
| title of volume: | Proceedings of the XV-th National School "Hundred Years of Superconductivity", Kazimierz Dolny, October 9-13, 2011 and Proceedings of the 9th National Symposium of Synchrotron Radiation Users, Warsaw, September 26-27, 2011 and Selected papers presented at the Tenth Symposium of Magnetic Measurements, Warsaw, September 17-19, 2011 |
| volume: | 121 |
| issue: | 4 |
| date of publication: | 2012 |
| pages: | 764-784 |
| ISSN: |
0587-4246 |
| eISSN: |
1898-794X |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | In this brief overview we discuss the principal features of real space pairing as expressed via corresponding low-energy (t J or periodic Anderson-Kondo) effective Hamiltonian, as well as consider concrete properties of those unconventional superconductors. We also rise the basic question of statistical consistency within the so-called renormalized mean-field theory. In particular, we provide the phase diagrams encompassing the stable magnetic and superconducting states. We interpret real space pairing as correlated motion of fermion pair coupled by short-range exchange interaction of magnitude J comparable to the particle renormalized band energy ≈ tx, where x is the carrier number per site. We also discuss briefly the difference between the real-space and the paramagnon-mediated sources of superconductivity. The paper concentrates both on recent novel results obtained in our research group, as well as puts the theoretical concepts in a conceptual as well as historical perspective. No slave-bosons are required to formulate the present approach. |
| number of pulisher's sheets: | 1,3 |
| affiliation: | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego |
| type: | journal article |
| subtype: | academic paper |
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