约瑟夫森-当前的签名的不配对的花束马约拉纳费米子
Rekha Kumari1, Babak Seradjeh2,3,4, Arijit Kundu1
1Department of Physics, <a href="https://ror.org/05pjsgx75">Indian institute of technology</a>, Kanpur, India.
Physical review letters
|November 22, 2024
概括
我们理论上研究了约瑟夫森电流在驱动的拓超导体中. 我们的发现揭示了可调节的约瑟夫森电流和一个新的"约瑟夫森Floquet总和规则"Floquet Majorana费米子.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子超导性 量子超导性 量子超导性
- 拓学材料 拓学材料
背景情况:
- 在拓超导体中,存在着诸如马约拉纳费米子之类的奇特准粒子.
- 浮板工程允许使用周期性驱动对材料特性进行动态控制.
- 约瑟夫森连接对于研究超导体中的量子现象至关重要.
研究的目的:
- 从理论上探索未配对的Floquet Majorana费米子的运输特征.
- 分析它们对受驱动的拓超导体中约瑟夫森电流的影响.
- 发现新的现象和这些系统的规则.
主要方法:
- 对于Floquet Majorana的分析表达式的导出 费米子职业.
- 对约瑟夫森电流周期性和振幅依赖性的分析.
- 分析结果的数值确认.
主要成果:
- 约瑟夫森电流表现出4π周期性和线性合依赖性,类似于静态情况.
- 电流振幅可以通过化学电位波调节.
- 一个新的"约瑟夫森Floquet总和规则"被确定为驱动的超导体.
结论:
- 在驱动的拓超导体中,Floquet Majorana铁米子提供可调节的传输特性.
- 发现的总和规则为驱动超导系统提供了新的理解.
- 理论预测通过数值模拟来验证.
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