The origin of the quantum superconductor to metal transition at zero temperature in two-dimensional superconductors is still an open problem,which has caused intensely discussion.Here,we report the observation of a qu...The origin of the quantum superconductor to metal transition at zero temperature in two-dimensional superconductors is still an open problem,which has caused intensely discussion.Here,we report the observation of a quantum superconductor-to-metal transition in La Al O_(3)/KTa O_(3)(111)interface,driven by magnetic field.When a small magnetic field perpendicular to the film plane is applied,the residual saturated resistance is observed,indicating the emergence of an anomalous metallic state associated with a failed superconductor.The dependence of saturated resistance on magnetic field at low temperature indicates that the observed metal state is a Bose metal state.From our findings,magnetic field regulating La Al O_(3)/KTa O_(3)(111)interface emerges as a platform to scrutinize the details of the anomalous metallic state in a controllable way.展开更多
基金the National Natural Science Foundation of China(Grant Nos.92065110,11974048,and 12074334)the National Basic Research Program of China(Grant Nos.2014CB920903 and 2013CB921701)。
文摘The origin of the quantum superconductor to metal transition at zero temperature in two-dimensional superconductors is still an open problem,which has caused intensely discussion.Here,we report the observation of a quantum superconductor-to-metal transition in La Al O_(3)/KTa O_(3)(111)interface,driven by magnetic field.When a small magnetic field perpendicular to the film plane is applied,the residual saturated resistance is observed,indicating the emergence of an anomalous metallic state associated with a failed superconductor.The dependence of saturated resistance on magnetic field at low temperature indicates that the observed metal state is a Bose metal state.From our findings,magnetic field regulating La Al O_(3)/KTa O_(3)(111)interface emerges as a platform to scrutinize the details of the anomalous metallic state in a controllable way.
