2015/02/11 by A. Vasserman, Richard Berkovits, R. Berkovits · 2 citations
Chemistry · Physics and Astronomy · #Chemistry #Condensed matter physics #Electrical resistivity and conductivity #Gaussian #Insulator (electricity) #Materials science #Metal #Metal–insulator transition #Model system #Optoelectronics #Physics #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Superlattice #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1016/j.physe.2015.05.003
published in Physica E Low-dimensional Systems and Nanostructures 72, 160-164 (Elsevier BV) · 6 pages, 7 figures
arxiv created 2015/02/11 · openalex publication_date 2015/05/06 · arxiv updated 2015/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we study the persistent current (PC) of a staggered Harper model, close to the half-filling. The Harper model, which is a quasi-periodic system, is different than other one dimensional systems with uncorrelated disorder in the fact that it can be in the metallic regime. Nevertheless, the PC for a wide range of parameters of the Harper model does not show typical metallic behavior, although the system is in the metallic regime. This is a result of the nature of the central band states, which are a hybridization of Gaussian states localized in superlattice points. When the superlattice is not commensurate with the system length, the PC behaves as in an insulator. Thus even in the metallic regime a typical finite Harper model may exhibit a PC expected from an insulator.