A simple theory for high Δ/ T c ratio in d-wave superconductors
| Autor: | X. Leyronas, R. Combescot |
|---|---|
| Přispěvatelé: | Laboratoire de Physique Statistique de l'ENS (LPS), Université Paris Diderot - Paris 7 (UPD7)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Gasiorek, Nelly |
| Rok vydání: | 2001 |
| Předmět: |
Coupling constant
Superconductivity Physics Condensed matter physics Scattering Condensed Matter - Superconductivity Order (ring theory) Fermi surface [PHYS.COND.CM-S] Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] 0103 physical sciences 010306 general physics 0210 nano-technology Sign (mathematics) Boson |
| Zdroj: | The European Physical Journal B: Condensed Matter and Complex Systems The European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2001, 23, pp.159-163 The European Physical Journal B: Condensed Matter and Complex Systems, 2001, 23, pp.159-163 |
| ISSN: | 1434-6028 1434-6036 |
| DOI: | 10.1007/s100510170063 |
| Popis: | We investigate a simple explanation for the high maximum gap to $T_{c}$ ratio found experimentally in high $T_{c}$ compounds. We ascribe this observation to the lowering of $T_{c}$ by boson scattering of electrons between parts of the Fermi surface with opposite sign for the order parameter. We study the simplest possible model within this picture. Our quantitative results show that we can account for experiment for a rather small value of the coupling constant, all the other ingredients of our model being already known to exist in these compounds. A striking implication of this theory is the fairly high value of the critical temperature in the absence of boson scattering. Comment: 5 pages, revtex, 2 figures |
| Databáze: | OpenAIRE |
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