Stability of degenerate vortex states and multi-quanta confinement effects in a nanostructured superconductor with Kagome lattice of elongated antidots
Stability of degenerate vortex states and multi-quanta confinement effects in a nanostructured superconductor with Kagome lattice of elongated antidots
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具有细长解点 Kagome 晶格的纳米结构超导体中简并涡旋态的稳定性和多量子约束效应
DOI：
10.1088/1367-2630/aae02d
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发表时间：
2018-09
影响因子：
3.3
通讯作者：
You He Zhou
中科院分区：
文献类型：
--
作者：
Cun Xue;Jun Yi Ge;An He;Vyacheslav S Zharinov;Victor V Moshchalkov;You He Zhou
在本工作中，我们使用低温扫描霍尔探针显微镜直接观察由细长反点固定的巨大涡流组成的多量子笼（MQCs）。在不同磁场下观测到的周期性但充分隔离的MQCs与基于时间相关的金兹堡-朗道（tdGL）方程的模拟涡态符合得很好。由于间隙涡旋和固定的巨涡旋之间的竞争，可以通过改变磁场来调节MQCs的形成和坍塌。间隙涡旋的实验统计表明，在高磁场下，间隙涡旋的模式变得更加无序。利用tdGL模拟研究了外电流作用下简并涡旋态的稳定性和多量子约束效应。简并涡旋态自由能的分裂表明，外加电流可以消除部分简并涡旋态。
In the present work, we directly visualize the multi-quanta cages (MQCs) consisting of the giant vortices pinned by the elongated antidots using low-temperature scanning Hall probe microscopy. The periodic but sufficiently isolated MQCs, observed at various magnetic fields, are in a good agreement with the simulated vortex states based on the time-dependent Ginzburg–Landau (tdGL) equations. Due to the competition between the interstitial vortices and the pinned giant vortices, the formation and collapse of the MQCs can be tuned by varying magnetic field. The experimental statistics of the interstitial vortices confined in the MQCs show that the interstitial vortex patterns become more disordered at higher magnetic fields. The stability of the degenerate vortex states and the multi-quanta confinement effects under an external current are also investigated by using the tdGL simulations. The splitting of the free energy of the degenerate vortex states indicates that applying external current can eliminate parts of the degenerate vortex states.
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影响因子：
4.1
作者：
T. Winiecki;C. Adams
通讯作者：
T. Winiecki;C. Adams
影响因子：
8.6
作者：
R. Kramer;A. Silhanek;J. Vondel;B. Raes;V. Moshchalkov
通讯作者：
R. Kramer;A. Silhanek;J. Vondel;B. Raes;V. Moshchalkov
影响因子：
38.3
作者：
J. Trastoy;Maxime Malnou;C. Ulysse;Rozenn Bernard;N. Bergeal;G. Faini;J. Lesueur;J. Briatico;J. Villegas
通讯作者：
J. Trastoy;Maxime Malnou;C. Ulysse;Rozenn Bernard;N. Bergeal;G. Faini;J. Lesueur;J. Briatico;J. Villegas
DOI：
10.1103/physreve.86.056709
发表时间：
2012-11
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
P. J. Pereira;V. Moshchalkov;L. Chibotaru
通讯作者：
P. J. Pereira;V. Moshchalkov;L. Chibotaru
影响因子：
3.7
作者：
V. Schweigert;F. Peeters
通讯作者：
V. Schweigert;F. Peeters