Microscopic neutron investigation of the Abrikosov state of high-temperature superconductors

Pramana

Joel Mesot1¹  Johan Juul Chang¹ 

[1] Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland$$

关键词: High-temperature superconductivity;    vortex lattice structures;    small angle neutron scattering.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Using small angle neutron scattering we have been able to observe for the first time a well-defined vortex lattice (VL) structure both in the hole-doped LSCO and electron-doped NCCO superconductors. Our measurements on optimally doped LSCO reveal the existence of a magnetic field-induced phase transition from a hexagonal to a square coordination of the VL. Various scenarios to explain such phase transition are presented. In NCCO also a clear square VL could be detected, which is unexpectedly kept down to the lowest measurable magnetic fields.

【 授权许可】

Unknown