Geometric effect on the phase transition in mesoscopic loops threaded by an Aharonov-Bohm flux
Geometric effect on the phase transition in mesoscopic loops threaded by an Aharonov-Bohm flux
复制标题
阿哈罗诺夫-玻姆通量对介观环相变的几何效应
DOI:
10.1063/1.4742051
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发表时间:
2012-08
影响因子:
3.2
通讯作者:
Zhou, Shi-Ping
中科院分区:
文献类型:
--
作者:
Zha, Guo-Qiao;Wang, Shan-Shan;Wang, Jing-Chao;Zhou, Shi-Ping
The quantum phase transition in mesoscopic noncircular loops threaded by an Aharonov-Bohm flux is systematically investigated by numerically solving the Bogoliubov-de Gennes equations self-consistently. We focus on the magnetic flux dependence of the s-wave superconducting order parameter and current in symmetric and asymmetric samples. The influence of surface indentation or bulge defects positioned at the inner or outer edge of the sample on the periodic oscillation is also discussed. We find various hc/e-flux periodicity evolution patterns, and the periodic phase transitions between the superconducing state and the resistive/normal state are demonstrated besides the superconducing state transitions. Our investigation may shed new light on material engineering and provide important insights to designing superconducting quantum devices.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
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