Anomalous spin Josephson effect
Mei-Juan Wang, Jun Wang, Lei Hao, Jun-Feng Liu
DOI 10.1103/PhysRevB.94.155443 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report a theoretical study on the spin Josephson effect arising from the exchange coupling of the two ferromagnets (Fs), which are deposited on a two-dimensional (2D) time-reversal-invariant topological insulator. An anomalous spin supercurrent Jsz∼sin(α+α0) is found to flow in between the two Fs and the ground state of the system is not limited to the magnetically collinear configuration (α=nπ,n is an integer) but determined by a controllable angle α0, where α is the crossed angle between the two F magnetizations. The angle α0 is the dynamic phase of the electrons traveling in between the two Fs and can be controlled electrically by a gate voltage. This anomalous spin Josephson effect, similar to the conventional φ0 superconductor junction, originates from the definite electron chirality of the helical edge states in the 2D topological insulator. These results indicate that the magnetic coupling in a topological system is different from the usual one in conventional materials.
Similar papers
Exchange-field-modulated 0-π transition and chiral edge supercurrents in a superconductor/ferromagnetic topological insulator/superconductor junction
similarity 0.93Jianfei Zou & Guojun Jin
Source status unknown — claims are unverified
Topological Josephson ϕ0 junctions
similarity 0.92Fabrizio Dolcini et al.
Source status unknown — claims are unverified
Spin-triplet superconductor–quantum anomalous Hall insulator–spin-triplet superconductor Josephson junctions: 0−π transition, ϕ0 phase, and switching effects
similarity 0.91Qiang Cheng et al.
Source status unknown — claims are unverified
Flux-induced topological superconductor in planar Josephson junction
similarity 0.90Jie Liu et al.
Source status unknown — claims are unverified
Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions
similarity 0.90Andreas Costa et al.
Source status unknown — claims are unverified
Spin supercurrent, magnetization dynamics, and φ-state in spin-textured Josephson junctions
similarity 0.90Iryna Kulagina & Jacob Linder
Source status unknown — claims are unverified