Topological quantum oscillation of magnetization in the Josephson φ0 junction

被引：4
|
作者：
Kim, Gwang-Hee [1 ]
Choi, Han-Yong [2 ,3 ,4 ]
机构：
[1] Sejong Univ, Dept Phys & Astron, Seoul 05006, South Korea
[2] Sungkyunkwan Univ, Dept Phys, Suwon 16419, South Korea
[3] Sungkyunkwan Univ, Inst Basic Sci Res, Suwon 16419, South Korea
[4] Asia Pacific Ctr Theoret Phys, Pohang 37673, South Korea
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 491卷
基金：
新加坡国家研究基金会;
关键词：
Molecular magnets; Quantum tunneling of magnetization; PHASE INTERFERENCE; FIELD; SYSTEMS;
D O I：
10.1016/j.jmmm.2019.165535
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We show that the ground state tunnel splitting of the magnetization can be topologically quenched in a nano-magnetic Josephson phi(0) junction. Due to the relative strength of the spin-orbit interaction the tunnel splitting is found to oscillate with the bias current applied to the junction as well as the magnetic field along the hard axis. Spin-coherent-state path integrals are used to obtain an analytic expression for the tunnel splitting controlled by topological interference of two tunnel paths of opposite windings and the condition in which the tunnel splitting is frozen. This feature is expected to be observable in existing experimental technique.
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收藏
页数：8
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