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quick and unfortunately dirty fix for the dirty s-wave. Doku not up-to-date yetgit status -uno

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suter_a 2014-09-03 13:52:48 +02:00
parent 78d8fe95f3
commit 0a4cad9348
1 changed files with 5 additions and 8 deletions
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13
src/external/libGapIntegrals/TGapIntegrals.cpp vendored
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@ -1039,23 +1039,20 @@ double TGapPowerLaw::operator()(double t, const vector<double> &par) const {
//--------------------------------------------------------------------
/**
* <p>Superfluid density for a dirty s-wave superconductor.
* For details see also the Memo GapIntegrals.pdf, especially Eq.(7) and (15).
* For details see also the Memo GapIntegrals.pdf, especially Eq.(8) and (15).
* Here we use INTENTIONALLY the temperature dependence of the gap according
* to A. Carrington and F. Manzano, Physica C 385 (2003) 205
*/
double TGapDirtySWave::operator()(double t, const vector<double> &par) const {
assert((par.size() == 2) || (par.size() == 3)); // two or three parameters: Tc (K), Delta(0) (meV), [a (1)]
double a = 1.0;
if (par.size() == 3) {
a = par[2];
}
assert(par.size() == 2); // two parameters: Tc (K), Delta(0) (meV)
if (t<=0.0)
return 1.0;
else if (t >= par[0])
return 0.0;
double deltaT(tanh(0.2707214816*par[0]/par[1]*sqrt(a*(par[0]/t-1.0)))); // DeltaS(T) : tanh(pi kB Tc / Delta(0) * sqrt()), pi kB = 0.2707214816 meV/K
double deltaT(tanh(1.82*pow(1.018*(par[0]/t-1.0),0.51)));
return deltaT*tanh(par[1]*deltaT/(0.172346648*t)); // Delta(T)/Delta(0)*tanh(Delta(T)/2 kB T), kB in meV/K
}