Theoretical study of superconducting diode effect in planar Td−MoTe2 Josephson junctions

Gong-Qi Wang; Jian-Jian Miao; Wei-Qiang Chen

doi:10.1103/kwz7-5stj

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Theoretical study of superconducting diode effect in planar Td−MoTe2 Josephson junctions

Gong-Qi Wang, Jian-Jian Miao, Wei-Qiang Chen

DOI 10.1103/kwz7-5stj · Physical Review B

T1

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Abstract

We investigate the Josephson diode effect (JDE) within quasi-2D planar systems featuring the C1v spin-orbit coupling (SOC) and Zeeman fields in the normal region. Our analysis is based on experimental observations conducted on MoTe2 planar Josephson junctions (JJ) subjected to out-of-plane magnetic fields. We emphasize the pivotal role of symmetry breaking in the current direction in the occurrence of JDE. Specifically, we observe the emergence of asymmetric Andreev bound states (ABSs) and 0−π-like transitions with φ0 shifts in the current phase relations (CPRs) in systems with specific symmetry breaking induced by SOC and Zeeman fields, leading to different critical current magnitudes in opposite directions. Additionally, we explore the influence of parameters such as the strength of SOC, Zeeman field magnitude and orientation, conduction channels with different transverse momenta, and junction lengths on the JDE efficiencies. Our results indicate the potential for diverse approaches to modulate efficiencies and provide insights that can aid in the discovery of materials and design of Josephson diodes with significantly enhanced efficiency.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MoTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown