Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions
Abstract
We exploit facet-dependent Andreev phase shifts to control topological superconductivity with a phase bias in a three-dimensional altermagnetic topological-insulator Josephson junction. In the weak link between two conventional s-wave superconductors, the d-wave altermagnetic order produces anisotropic momentum shifts of the surface Dirac cones. The resulting net momentum of the states involved in Andreev reflection generates additional propagation phases that differ between facets. Consequently, the facet-resolved Andreev spectra exhibit gap closings at distinct phase biases, giving rise to topological superconducting regimes that host Majorana zero modes (MZMs). We further show that the spatial locations of the MZMs can be controlled by the phase bias. Moreover, these topological superconducting transitions are only weakly affected by moderate variations in the chemical potential, obviating the need for fine-tuning to the Dirac point. Our results establish a platform for realizing and spatially controlling MZMs by tuning the superconducting phase bias in altermagnetic topological-insulator Josephson junctions.
Related
- Tunneling spectroscopy of topological insulator Josephson junctions
- Magnetotransport experiments on side-contacted topological insulator three-terminal Josephson junctions
- Phase Transitions in Disordered Altermagnetic Josephson Junctions
- Finite-Temperature Transconductance of Multiterminal Josephson Junctions with Topological Andreev Spectra
- Evanescent-mode Casimir-Josephson force and gate-controlled resonances in ballistic graphene Josephson junctions
BibTeX
@misc{dong2026phasecontrolled,
title = {{Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions}},
author = {Hao Dong and Xun-Jiang Luo and Xiao-Hong Pan and Xin Liu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.11633},
eprint = {2609.11633},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.11633},
}
RIS
TY - UNPB
TI - Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions
AU - Hao Dong
AU - Xun-Jiang Luo
AU - Xiao-Hong Pan
AU - Xin Liu
PY - 2026
DA - 2026/09/11
PB - arXiv
DO - 10.48550/arxiv.2609.11633
UR - https://arxiv.org/abs/2609.11633
AB - We exploit facet-dependent Andreev phase shifts to control topological superconductivity with a phase bias in a three-dimensional altermagnetic topological-insulator Josephson junction. In the weak link between two conventional s-wave superconductors, the d-wave altermagnetic order produces anisotropic momentum shifts of the surface Dirac cones. The resulting net momentum of the states involved in Andreev reflection generates additional propagation phases that differ between facets. Consequently, the facet-resolved Andreev spectra exhibit gap closings at distinct phase biases, giving rise to topological superconducting regimes that host Majorana zero modes (MZMs). We further show that the spatial locations of the MZMs can be controlled by the phase bias. Moreover, these topological superconducting transitions are only weakly affected by moderate variations in the chemical potential, obviating the need for fine-tuning to the Dirac point. Our results establish a platform for realizing and spatially controlling MZMs by tuning the superconducting phase bias in altermagnetic topological-insulator Josephson junctions.
ER -