Magnetic Field Dependence of the Energy Gap and the Current Density for a Superconductor
Open Access
- 1 March 1964
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 31 (3) , 388-398
- https://doi.org/10.1143/ptp.31.388
Abstract
We obtained a formula showing the decrease of the energy gap at finite temperature for a superconductor in the presence of a static magnetic field. We calculated the decrease up to the second order in the field strength both in the London limit and the Pippard limit. In the London limit there appear terms depending on A2 as well as B2. Near the absolute zero of temperature, we determined the temperature dependence of them explicitly. The results agree with Nambu and Tuan's, as the temperature tends to zero. Using the above result, we extended the Ginzburg-Landau equation for a superconductor of the London type. This has a new term. And this agrees with GLG equation when the temperature approaches the temperature of the critical point.Keywords
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