منابع مشابه
Pressure effects on Ca60Al40 metallic glass superconductors
Theoretical computation of the pressure dependence superconducting state parameters of binary Ca60Al40 is reported using model potential formalism. Explicit expressions have been derived for the volume dependence of the electron–phonon coupling strength λ and the Coulomb pseudopotential μ* considering the variation of Fermi momentum KF and Debye temperature ӨD with volume. Well known Ashcroft’s...
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It has been shown that a gravitational dual to a superconductor can be obtained by coupling anti-de Sitter gravity to a Maxwell field and charged scalar. We review our earlier analysis of this theory and extend it in two directions. First, we consider all values for the charge of the scalar field. Away from the large charge limit, backreaction on the spacetime metric is important. While the qua...
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A B.C.S. type of theory (see BARDEEX, COOPER and SCHREIFFER, Phys. Rev. 108, 1175 (1957)) is sketched for very dirty superconductors, where elastic scattering from physical and chemical impurities is large compared with the energy gap. This theory is based on pairing each one-electron state with its exact time reverse, a generalization of the k up, -k down pairing of the B.C.S. theory which is ...
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I INTRODUCTION When a superconduct ing magnet i s quoted t o be " s t a b l e " , t h i s a lmost c e r t a i n l y means t h a t no-matter-what mechanical , thermal o r e l e c t r i c a l p e r t u r b a t i o n induces a t r a n s i t i o n f rom the superconduct ing s t a t e t o t h e normal s t a t e , t he sur round ing medium i s capable o f e x t r a c t i n g t h i s sudden q u a n t ...
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ژورنال
عنوان ژورنال: Physica C: Superconductivity and its Applications
سال: 2007
ISSN: 0921-4534
DOI: 10.1016/j.physc.2007.03.163