Vortex pinning and stability in the low field, superconducting phases of UPt_3

Vortex pinning and stability in the low field, superconducting phases of UPt_3
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UPt_3 低场超导相中的涡旋钉扎和稳定性

DOI:
10.1103/physrevlett.80.1078
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发表时间:
1998
影响因子:
8.6
通讯作者:
M. Sigrist
M. Sigrist
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
E. Shung;T. Rosenbaum;M. Sigrist

文献摘要

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我们使用一个微型霍尔探针磁强计阵列来探测磁通在单晶环面或重费米子超导体UPt_3中的进入和流动。在洞的局部测量是非常敏感的涡运动的任何地方在环面,他们允许我们检测雪崩限制在较低温度的超导阶段,并与一个尖锐的发病。计算机模拟支持的机制依赖于超导序参量的退化性质。
We use an array of miniature Hall probe magnetometers to probe the entry and flow of flux in a single crystal torus or the heavy fermion superconductor UPt_3. Local measurements over the hole are exquisitely sensitive to vortex motion anywhere in the torus, and they permit us to detect avalanches restricted to and with a sharp onset in the lower temperature superconducting phase. Computer simulations support a mechanism dependent upon the degenerate nature of the superconducting order parameter.