Steering and local tunneling signatures of Majorana corner modes in altermagnetic Josephson junctions
Phys. Rev. B 114, 274507 – Published 13 November, 2026
DOI: https://doi.org/10.1103/7mrc-tqzl
Abstract
Dynamical manipulation of Majorana zero modes and their reliable distinction from topologically trivial states remain paramount challenges in topological quantum computation. Here, we propose a phase-biased altermagnetic Josephson junction as a versatile platform for generating and controlling Majorana corner configurations. Our platform utilizes the macroscopic superconducting phase difference and the Néel-vector orientation as independent control knobs to reshape the boundary mass. This allows the spatial configuration of Majorana corner modes (MCMs) to be selected at different corners of a fixed device geometry. This spatial reconfiguration yields a control-correlated conductance response. Across these configurations, the quantized zero-bias peak appears at the contacted corner in the ideal tunneling model when an MCM is present and is suppressed when it is absent. This correlation connects phase and magnetic control of corner configurations with local tunneling readout.
