TY - JOUR
AU1 - Wang, Xing
AU2 - Chen, Jianyong
AB - Driving topological nontrivial materials into superconductors is promising to realizing topological superconductors which lay the foundation towards fault-tolerant quantum computing. However, material realization so far is rare and less satisfied. Recently, two-dimensional topological nodal lines semimetal CuSe (Adv. Mater., 30 (2018) 1,707,055) and Cu2Si (Nat. Commun., 8 (2017) 1007) are successfully fabricated. Based on complete and reliable first-principle calculations, we predict that both CuSe and Cu2Si are intrinsic superconductors with transition temperature of 0.36 K and 1.54 K. For dynamic stability, spin–orbit coupling is essential to obtain positive phonon dispersion of free-standing CuSe. As a suitable substrate, graphene can not only preserve the nodal line and the electron–phonon coupling (EPC) but also substantially enhance the dynamical stability of CuSe. In addition, electron–electron correlation in CuSe enhances the EPC of E'mode by a factor of 1.84. Tc of Cu2Si decreases with the increasing of strains. The coexistence of superconductivity and nontrivial topology in Cu2Si and CuSe makes them a promising candidate for realizing topological superconductivity.
TI - Dynamical Stability and Superconductivity in Two-dimensional Nodal Line Semimetal CuSe and Cu2Si
JF - Journal of Superconductivity and Novel Magnetism
DO - 10.1007/s10948-021-05924-9
DA - 2021-09-01
UR - https://www.deepdyve.com/lp/springer-journals/dynamical-stability-and-superconductivity-in-two-dimensional-nodal-g5FPuwae0H
SP - 2229
EP - 2237
VL - 34
IS - 9
DP - DeepDyve
ER -