Programs
- B. Sc. Clinical Nutrition, Dietetics, and Food Science - Undergraduate
- Post Doctoral Fellowship in EEG & Clinical Epileptology - Fellowship
Publication Type : Journal Article
Source : New Journal of Physics 15, 023023, published 15 February 2013
Url : https://iopscience.iop.org/article/10.1088/1367-2630/15/2/023023/meta
Campus : Chennai
School : School of Engineering
Department : Physics
Year : 2013
Abstract : We show that the presence of a spin-dependent random potential in a superconductor or a superfluid atomic gas leads to distinct transitions at which the energy gap and average order parameter vanish, generating an intermediate gapless superfluid phase, in marked contrast to the case of spin-symmetric randomness where no such gapless superfluid phase is seen. By allowing the pairing amplitude to become inhomogeneous, the gapless superconducting phase persists up to considerably higher disorder compared with the prediction of Abrikosov–Gorkov. The low-lying excited states are located predominantly in regions where the pairing amplitude vanishes and coexist with the superfluid regions with a finite pairing. Our results are based on inhomogeneous Bogoliubov–de Gennes mean field theory for a two-dimensional attractive Hubbard model with spin-dependent disorder.
Cite this Research Publication : M. Jiang, Ravindra Nanguneri, N. Trivedi, G. G. Batrouni, R. T. Scalettar, "Gapless inhomogeneous superfluid phase with spin-dependent disorder," New Journal of Physics 15, 023023, published 15 February 2013