Big, Fast Vortices in the d-RVB theory of High Temperature Superconductivity
Big, Fast Vortices in the d-RVB theory of High Temperature Superconductivity
复制标题
高温超导 d-RVB 理论中的大而快速的涡旋
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Millis
中科院分区：
文献类型：
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作者：
L. Ioffe;A. Millis
利用从属玻色子U(1)规范理论模型，研究了Mott绝缘相附近对d波超导体超流性质的影响。该模型有两个对应于超导电性的极限，要么出现在重整化的费米液体区域，要么出现在非费米液体区域。确定了三个关键的物理参数：涡旋的大小由它引起的超流确定，超流与准粒子的耦合，以及“非耗散时间导数”项。随着Mott相的临近，由超流定义的核心尺寸发散，超流和准粒子之间的耦合消失，非耗散时间导数的大小急剧增加。研究发现，由于涡旋运动引起的耗散随掺杂的3次方而变化。估计了上临界场和可观察到副电导的临界区的大小，发现它受超流长度尺度的控制。
The effect of proximity to a Mott insulating phase on the superflow properties of a d-wave superconductor is studied using the slave-boson U(1)-gauge-theory model. The model has two limits corresponding to superconductivity emerging either out of a ``renormalized Fermi-liquid' or out of a non-Fermi-liquid regime. Three crucial physical parameters are identified: the size of the vortex as determined from the supercurrent it induces, the coupling of the superflow to the quasiparticles, and the ``nondissipative time derivative' term. As the Mott phase is approached, the core size as defined from the supercurrent diverges, the coupling between superflow and quasiparticles vanishes, and the magnitude of the nondissipative time derivative dramatically increases. The dissipation due to a moving vortex is found to vary as the third power of the doping. The upper critical field and the size of the critical regime in which paraconductivity may be observed are estimated and found to be controlled by the supercurrent length scale.