Josephson diode effect in a line-centered honeycomb lattice based superconductor junction

Ya-Jun Wei; Juan-Juan Wang; J. Wang

doi:10.1103/PhysRevB.108.054521

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Josephson diode effect in a line-centered honeycomb lattice based superconductor junction

Ya-Jun Wei, Juan-Juan Wang, J. Wang

DOI 10.1103/PhysRevB.108.054521 · Physical Review B

T1

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Abstract

The Josephson diode effect (JDE) is the asymmetry of the critical supercurrent flowing along opposite current directions. We study a mechanism in this work to generate a possible JDE in the two-dimensional line-centered honeycomb (LCH) lattice based Josephson junction in which the supercurrent flows via the topological edge states. Since the two helical edge states of the LCH topological insulator have different Fermi velocities, the field-free Josephson junction is shown to exhibit a spin-resolved JDE in which the critical supercurrent is asymmetric over the two opposite current directions for each spin species. By introducing magnetization in the circuit, a charge version of JDE occurs in the system.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ni3C12(NH)6S6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown