摘要
Trigonal PtBi_(2)(γ-PtBi_(2))is a newly discovered polymorphic material with novel topological and superconducting properties[1,2].Due to its non-centrosymmetric structure,γ-PtBi_(2)hosts triply degenerate points and Weyl fermions[3–6].On the other hand,bulk superconductivity inγ-PtBi_(2)has been observed with a critical temperature Tc up to 0.6 K[7].Recent studies also uncover its surface superconductivity with Tc of 10 K[6,8].Therefore,γ-PtBi_(2),possessing non-trivial electronic topology and superconductivity,is a potential candidate for realizing the Fu-Kane topological superconductivity[6,9,10],which is timely needed to be further studied by low-temperature scanning tunneling microscopy(STM).However,as the first step,STM evidences of the topological surface states inγ-PtB_(2)are still lacking.
基金
supported by the National Natural Science Foundation of China(92365201,12234011,12374053,12334003,and 52388201)
the Ministry of Science and Technology of the People’s Republic of China(2022YFA1403100 and 2023YFA1406400)
the Innovation Program for Quantum Science and Technology(2021ZD0302402)
the National Key Research and Development Program of China(2022YFA1403400 and 2020YFA0308800)
the Beijing National Laboratory for Condensed Matter Physics(2023BNLCMPKF007)
the Beijing Natural Science Foundation(Z210006)
supported by the Innovation Program for Quantum Science and Technology(2023ZD0300500)
the National Science Fund for Distinguished Young Scholars(12025405)
the Beijing Advanced Innovation Center for Future Chip(ICFC),and the Beijing Advanced Innovation Center for Materials Genome Engineering.
