TY - JOUR
AU - Xiaoqing Zhou
AU - Kyle Gordon
AU - Kyung-Hwan Jin
AU - Haoxiang Li
AU - Dushyant Narayan
AU - Hengdi Zhao
AU - Hao Zheng
AU - Huaqing Huang
AU - Gang Cao
AU - Nikolai Zhigadlo
AU - Feng Liu
AU - Daniel Dessau
AB - Most topological superconductors known to date suffer from low transition temperatures (T<sub>c</sub>) and/or high fragility to disorder and dopant levels, which is hampering the progress in this promising field. Here, utilizing a combination of angle-resolved photoemission spectroscopy measurements and density-functional theory calculations, we show the presence of a type of topological Dirac nodal line surface state on the [010] faces of the\&nbsp;T<sub>c</sub>=39\&nbsp;K BCS superconductor\&nbsp;MgB<sub>2</sub>. This surface state should be highly tolerant against disorder and inadvertent doping variations and is expected to go superconducting via the proximity effect to the bulk superconductor that this state is intimately connected to. This would represent a form of high-temperature topological superconductivity.
BT - Physical Review B
DA - 2019-10
DO - 10.1103/PhysRevB.100.184511
N2 - Most topological superconductors known to date suffer from low transition temperatures (T<sub>c</sub>) and/or high fragility to disorder and dopant levels, which is hampering the progress in this promising field. Here, utilizing a combination of angle-resolved photoemission spectroscopy measurements and density-functional theory calculations, we show the presence of a type of topological Dirac nodal line surface state on the [010] faces of the\&nbsp;T<sub>c</sub>=39\&nbsp;K BCS superconductor\&nbsp;MgB<sub>2</sub>. This surface state should be highly tolerant against disorder and inadvertent doping variations and is expected to go superconducting via the proximity effect to the bulk superconductor that this state is intimately connected to. This would represent a form of high-temperature topological superconductivity.
PY - 2019
EP - 184511
T2 - Physical Review B
TI - Observation of topological surface states in the high-temperature superconductor
UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.184511
VL - 100
SN - 2469-9950
ER -