Tunable periodic evolution and quantum phase transition in mesoscopic two-band superconducting loops
Tunable periodic evolution and quantum phase transition in mesoscopic two-band superconducting loops
复制标题
介观双带超导环中的可调谐周期演化和量子相变
DOI:
10.1063/1.4808295
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发表时间:
2013-06
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, Qiang;Zhou, Shi-Ping
The magnetic flux dependence of the superconducting state evolution for mesoscopic two-band noncircular loops is studied by numerically solving the generalized Bogoliubov-de Gennes equations self-consistently. The crossover from hc / e- to hc/2e-flux periodicity of the current can be controlled by increasing the interband coupling strength or the temperature. For sufficiently small interband coupling, the order parameters of the two bands may exhibit different winding numbers in narrow flux ranges. Moreover, different patterns of flux-tuned quantum phase transitions between the superconducting state and the resistive/normal state, which are strongly sensitive to the temperature and the strength of the pairing interaction as well as the loop geometry, are demonstrated in the present two-band samples. Similar coherent phenomena are expected for the superconducting multi-layer or effectively multi-band systems.
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影响因子:
3.7
作者:
J. Berger;M. Milovsevi'c
通讯作者:
J. Berger;M. Milovsevi'c
影响因子:
8.6
作者:
Eom, D;Qin, S;Shih, CK
通讯作者:
Shih, CK
DOI:
10.1103/physrevb.80.014523
发表时间:
2009-05
期刊:
arXiv: Superconductivity
影响因子:
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作者:
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通讯作者:
Xiang Hu;C. Ting;Jian-Xin Zhu
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3.7
作者:
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通讯作者:
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影响因子:
8.6
作者:
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通讯作者:
Y. Barash