Superconducting coherence length
Encyclopedia
A Superconducting coherence length, usually denoted as 
, can be interpreted in two different ways:
The superconducting coherence length (
, Greek lowercase xi) is one of two parameters in a Ginzburg-Landau theory
of superconductivity.
It is given by:
, can be interpreted in two different ways:- It gives approximate spatial dimension (size) of the Cooper pairCooper pairIn condensed matter physics, a Cooper pair or BCS pair is two electrons that are bound together at low temperatures in a certain manner first described in 1956 by American physicist Leon Cooper...
, - It sets the length scale on which the superconducting order parameter changes considerably.
The superconducting coherence length (
, Greek lowercase xi) is one of two parameters in a Ginzburg-Landau theoryGinzburg-Landau theory
In physics, Ginzburg–Landau theory, named after Vitaly Lazarevich Ginzburg and Lev Landau, is a mathematical theory used to model superconductivity. It does not purport to explain the microscopic mechanisms giving rise to superconductivity...
of superconductivity.
It is given by:
See also
- phenomenological Ginzburg-Landau theoryGinzburg-Landau theoryIn physics, Ginzburg–Landau theory, named after Vitaly Lazarevich Ginzburg and Lev Landau, is a mathematical theory used to model superconductivity. It does not purport to explain the microscopic mechanisms giving rise to superconductivity...
of superconductivity - microscopic BCS theoryBCS theoryBCS theory — proposed by Bardeen, Cooper, and Schrieffer in 1957 — is the first microscopic theory of superconductivity since its discovery in 1911. The theory describes superconductivity as a microscopic effect caused by a "condensation" of pairs of electrons into a boson-like state...
of superconductivity