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

被引：0
作者：
Johan Juul Chang
Joel Mesot
机构：
[1] ETH Zurich and Paul Scherrer Institute,Laboratory for Neutron Scattering
来源：
Pramana | 2008年 / 71卷
关键词：
High-temperature superconductivity; vortex lattice structures; small angle neutron scattering; 61.12.Ex; 74.72.Dn;
D O I：
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中图分类号：
学科分类号：
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.
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页码：679 / 685
页数：6
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