Superconductivity in Cage Compounds La$T{r}_2$Al${}_{20}$ with $Tr$ = Ti, V, Nb, and Ta

Akira Yamada, Ryuji Higashinaka, Tatsuma D. Matsuda +1

Electrical resistivity, magnetic susceptibility, and specific heat measurements on single crystals of La$T{r}_2$Al${}_{20}$ ($Tr$ = Ti, V, Nb, and Ta) revealed that these four compou…