【摘 要】
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Nontrivial topological behaviors in superconducting materials provide resourceful ground for the emergence and study of unconventional quantum states.Charge doping by the controlled intercalation of donor atoms is an efficient route for enhancing/induceme
【机 构】
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National Synchrotron Radiation Laboratory,CAS Center for Excellence in Nanoscience,CAS Key Laborator
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Nontrivial topological behaviors in superconducting materials provide resourceful ground for the emergence and study of unconventional quantum states.Charge doping by the controlled intercalation of donor atoms is an efficient route for enhancing/inducement of superconducting and topological behaviors in layered topological insulators and semimetals.Herein,we enhanced the superconducting temperature of TaSe2 by 20-folds (～ 3 K) through Sn atoms intercalation.Using first-principles calculations,we demonstrated the existence of nontrivial topological features.Sn0.5TaSe2 displays topological nodal lines around the K high symmetry point in the Brillouin zone,with drumhead-like shaped surface states protected by inversion symmetry.Altogether,the coexistence of these properties makes Sn0.5TaSe2 a potential candidate for topological superconductivity.
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