Bulk superconductivity in the Dirac semimetal TlSb

A feasible strategy to realize the Majorana fermions is searching for a simple compound with both bulk superconductivity and Dirac surface states. In this paper, we performed calculations of electronic band structure, Fermi states, as well measured resistivity, magnetization, specific heat TlSb CsCl-type structure. The structure show that semimetal when spin-orbit coupling taken into account. Meanwhile, first found type-II superconductor $T_c$ = 4.38 K, $H_{c1}$(0) 148 Oe, $H_{c2}$(0) 1.12 T $\kappa_{GL}$ 10.6, confirmed it be moderately coupled s-wave superconductor. Although can not determine which bands near level $E_F$ responsible superconductivity, its coexistence topological states implies may material platform fault-tolerant quantum computations.