Export citation

Export citation

Choose format for download:

Download Citation

    Robust quantized thermal conductance of Majorana floating edge bands in d-wave superconductors

    Yanmiao Han1,*, Yu-Hao Wan2,*,†, Zhaoqin Cao3, Rundong Zhao1,‡, and Qing-Feng Sun2,4,§

    • *These authors contributed equally to this work.
    • †Contact author: wanyh@stu.pku.edu.cn
    • ‡Contact author: rdzhao@buaa.edu.cn
    • §Contact author: sunqf@pku.edu.cn

    Phys. Rev. B 113, 155407 – Published 6 April, 2026

    DOI: https://doi.org/10.1103/cpp8-bgz5

    Abstract

    We propose and characterize a different class of Majorana boundary states, i.e., floating Majorana edge bands (FMEBs), which emerge in two-dimensional superconductors that break time-reversal symmetry yet host helical-like transport. In contrast to conventional chiral or helical edge modes, FMEBs form isolated, momentum-separated counterpropagating Majorana modes detached from the bulk continuum. We identify a minimal mechanism for their emergence via anisotropic Wilson masses in a two-band Bogoliubov–de Gennes model, and demonstrate their microscopic realization in a quantum anomalous Hall (QAH) insulator proximitized by a d-wave superconductor. Using nonequilibrium Green's function simulations, we uncover clear transport fingerprints: a quantized total thermal conductance in two-terminal devices, and a robust half-quantized plateau in four-terminal geometries that cleanly distinguishes FMEBs from chiral N=±2 QAH phases. This thermal response remains remarkably stable under finite temperature, moderate long-range disorder, and finite chemical potential. Our findings establish FMEBs as an experimentally accessible route toward helical-like Majorana transport in systems without time-reversal symmetry, with direct implications for topological quantum computation.

    Physics Subject Headings (PhySH)

    Authorization Required

    We need you to provide your credentials before accessing this content.

    References (Subscription Required)

    Outline

    Information

    Sign In to Your Journals Account

    Filter

    Filter

    Article Lookup

    Enter a citation