Electrically controlled 0-π oscillations and antiferromagnetic Josephson spin valve with PT symmetry
- 1Department of Physics, University of Science and Technology
- 2Institute for Theoretical Solid State Physics, IFW Dresden
- 3RIKEN Center for Emergent Matter Science (CEMS)
Abstract
We propose that unconventional Josephson effects can typically emerge in PT-symmetric antiferromagnetic (AFM) bilayer systems. When proximitized by a conventional superconductor, these heterostructures host dominant interlayer pairing correlation that features a distinctive spin texture enabled by the strong exchange field. Specifically, we demonstrate a novel mechanism for electrically tunable 0-π oscillations in lateral Josephson junctions, controlled by an out-of-plane electric displacement field. This behavior originates from field-induced finite-momentum pairing correlation, a hallmark of the unique layer-pseudospin structure in PT-symmetric AFM bilayers. Furthermore, we introduce a AFM Josephson spin valve based on these exotic proximity-induced spin-layer-locked pairing correlation, in which the supercurrent exhibits a strong dependence on the internal Néel order. Our findings establish PT-symmetric AFM bilayers as a versatile platform for phase-controllable Josephson junctions and superconducting magnetic random-access memory, with promising applications in superconducting circuits and ultralow-power computing.
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BibTeX
@article{hu2026electrically,
title = {{Electrically controlled 0-π oscillations and antiferromagnetic Josephson spin valve with PT symmetry}},
author = {Jin-Xin Hu and Mengli Hu and Ying-Ming Xie and K. T. Law},
journal = {npj Quantum Materials},
year = {2026},
month = jul,
doi = {10.1038/s41535-026-00920-5},
url = {https://doi.org/10.1038/s41535-026-00920-5},
note = {CC BY},
}
RIS
TY - JOUR
TI - Electrically controlled 0-π oscillations and antiferromagnetic Josephson spin valve with PT symmetry
AU - Jin-Xin Hu
AU - Mengli Hu
AU - Ying-Ming Xie
AU - K. T. Law
PY - 2026
DA - 2026/07/01
JO - npj Quantum Materials
DO - 10.1038/s41535-026-00920-5
UR - https://doi.org/10.1038/s41535-026-00920-5
AB - We propose that unconventional Josephson effects can typically emerge in PT-symmetric antiferromagnetic (AFM) bilayer systems. When proximitized by a conventional superconductor, these heterostructures host dominant interlayer pairing correlation that features a distinctive spin texture enabled by the strong exchange field. Specifically, we demonstrate a novel mechanism for electrically tunable 0-π oscillations in lateral Josephson junctions, controlled by an out-of-plane electric displacement field. This behavior originates from field-induced finite-momentum pairing correlation, a hallmark of the unique layer-pseudospin structure in PT-symmetric AFM bilayers. Furthermore, we introduce a AFM Josephson spin valve based on these exotic proximity-induced spin-layer-locked pairing correlation, in which the supercurrent exhibits a strong dependence on the internal Néel order. Our findings establish PT-symmetric AFM bilayers as a versatile platform for phase-controllable Josephson junctions and superconducting magnetic random-access memory, with promising applications in superconducting circuits and ultralow-power computing.
SN - 2397-4648
ER -