Physical properties of SrSn4 single crystals
  We present detailed thermodynamic and transport measurements on single crystals of the recently discovered binary intermetallic superconductor, SrSn4. We find this material to be a slightly anisotropic three-dimensional, strongly-coupled, possibly multi-band, superconductor. Hydrostatic pressure causes a decrease in the superconducting transition temperature at the rate of -0.068 K/kbar. Band structure calculations are consistent with experimental data on Sommerfeld coefficient and upper superconducting critical field anisotropy and suggest complex, multi-sheet Fermi surface formed by four bands. 
Xiao Lin, Sergey L. Bud'ko, German D. Samolyuk, Milton S.   Torikachvili, and Paul C. Canfield
cond-mat.supr-con