Perfect metal phases of one-dimensional and anisotropic higher-dimensional systems

Article

关键词: TOPOLOGICAL INSULATORS;    2-DIMENSIONAL METAL;    LIPID COMPLEXES;    LOCALIZATION;    TRANSITION;    MODELS;   

DOI  :  10.1103/PhysRevB.90.241101

来源: SCIE

【 摘 要 】

We show that a one-dimensional quantum wire with 23 channels of interacting fermions has a perfect metal phase in which all weak perturbations that could destabilize this phase are irrelevant. Consequently, weak disorder does not localize it, a weak periodic potential does not open a gap, and contact with a superconductor also fails to open a gap. Similar phases occur for N >= 24 channels of fermions, except for N = 25, and for 8k channels of interacting bosons, with k >= 3. Arrays of perfect metallic wires form higher-dimensional fermionic or bosonic perfect metals, albeit highly anisotropic ones.

【 授权许可】

Free