Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters
Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters
We study the effects of anisotropic order parameters on the temperature dependence of London penetration depth anisotropy ${\ensuremath{\gamma}}_{\ensuremath{\lambda}}(T)$. After ${\mathrm{MgB}}_{2}$, this dependence is commonly attributed to distinct gaps on multiband Fermi surfaces in superconductors. We have found, however, that the anisotropy parameter may depend on temperature also in one-band materials …