Superconductivity in the ternary intermetallics YbPd2Ge2, La

Type-I superconductivity in KBi2single crystals

“…In contrast, type-I SCs are thought empirically to occur mainly in elementary metals and metalloids and type-I superconducting compounds are very rare. 2 Recently, however, serval binary and ternary compounds are found to be type-I SCs, for instance, YbSb 2 , 3,4 TaSi 2 , 5 LaPd 2 Ge 2 , 6 LaRh 2 Si 2 , 7 (Lu, Y, La)Pd 2 Si 2 , 7 LaRhSi 3 , 8 Ag 5 Pb 2 O 6 , 9 ScGa 3 and LuGa 3 . 10 These studies break the empirical relation between type-I superconductivity and elemental metals and enlarge the family of type-I SCs to binary and ternary compounds.…”

Superconductivity at 3.85 K in BaPd 2 As 2 with the ThCr 2 Si 2 -type structure

“…The transition metal Pd-containing ThCr 2 Si 2 -type compounds have been studied by several groups, and some discovered superconductors are LaPd 2 Ge 2 (T c = 1.12 K) [16], CaPd 2 Ge 2 (T c = 1.98 K) [17], SrPd 2 Ge 2 (T c = 3.04 K) [14], CaPd 2 As 2 (T c = 1.27 K), SrPd 2 As 2 (T c = 0.92 K) [15], and LaPd 2 As 2 (T c = 1 K) etc. [18].…”

BaNiSn3-type ternary germanides SrMGe3 (M=Ir; Pd and Pt)

“…The structure of ThCr 2 Si 2 is the ordered ternary derivative of the binary BaAl 4 -type structure [1]. Although superconductivity is observed for some compounds, the critical temperature (T c ) is generally very low, as reported for LaPd 2 Ge 2 and LaIr 2 Ge 2 with T c 's of 1.12 [2] and 1.5 K [3], respectively. Many works were carried out for the discovery of new intermetallic superconductors with higher T c 's.…”