Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors
Sudhansu S. Mandal, T. V. Ramakrishnan
DOI 10.1103/PhysRevB.102.024514 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Recent experiments on disordered superconductors find that the superfluid density ns(T) decreases dramatically and characteristically with disorder, differently from what is expected for a mean order parameter field or BCS, amplitude only, picture for the superconductor. We describe here a new microscopic free energy functional which explicitly describes its dependence on both the amplitude and phase of superconducting order, in a gauge invariant manner. We use this here in an approximation of noninteracting phase fluctuations (Gaussian or harmonic approximation) to obtain ns(T) in the presence of (static) disorder. We compare our results successfully with experiment.
Similar papers
Effects of Thermal Phase Fluctuations in a Two-Dimensional Superconductor: An Exact Result for the Spectral Function
similarity 0.91A. M. Tsvelik & F. H. L. Essler
Source status unknown — claims are unverified
Fluctuation conductivity of high-Tc superconductors
similarity 0.91Kazumi Maki & R. S. Thompson
Source status unknown — claims are unverified
Disorder-Induced Freezing of Dynamical Spin Fluctuations in Underdoped Cuprate Superconductors
similarity 0.90Brian M. Andersen et al.
Source status unknown — claims are unverified
Critical fluctuation effects near the normal-metal–superconductor phase transition at low temperatures
similarity 0.90V. P. Mineev & M. Sigrist
Source status unknown — claims are unverified
Quench dynamics of superconducting fluctuations and optical conductivity in a disordered system
similarity 0.89Yonah Lemonik & Aditi Mitra
Source status unknown — claims are unverified
Density of states in d-wave superconductors disordered by extended impurities
similarity 0.89İnanç Adagideli et al.
Source status unknown — claims are unverified