Quantum interference in superposed lattices

• 成果类型: Article
• 署名作者: Feng, Yejun; Wang, Yishu; Rosenbaum, T. F.; Littlewood, P. B.; Chen, Hua
• 署名单位: Okinawa Institute of Science & Technology Graduate University; University of Tennessee System; University of Tennessee Knoxville; University of Tennessee System; University of Tennessee Knoxville; California Institute of Technology; University of Chicago; University of Chicago; University of St Andrews; Colorado State University System; Colorado State University Fort Collins
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14951
• DOI: 10.1073/pnas.2315787121
• 发表日期: 2024-02-13
• 关键词: fermi-surface; magnetic breakdown; antiferromagnetism; dependence; phase

摘要

Charge transport in solids at low temperature reveals a material's mesoscopic properties and structure. Under a magnetic field, Shubnikov-de Haas (SdH) oscillations inform complex quantum transport phenomena that are not limited by the ground state characteristics and have facilitated extensive explorations of quantum and topological interest in two- and three-dimensional materials. Here, in elemental metal Cr with two incommensurately superposed lattices of ions and a spin-density-wave ground state, we reveal that the phases of several low-frequency SdH oscillations in sigma(xx) (rho(xx)) and sigma yy (rho(yy)) are no longer identical but opposite. These relationships contrast with the SdH oscillations from normal cyclotron orbits that maintain identical phases between sigma(xx) (rho(xx)) and sigma(yy) (rho(yy)) . We trace the origin of the low-frequency SdH oscillations to quantum interference effects arising from the incommensurate orbits of Cr's superposed reciprocal lattices and explain the observed pi-phase shift by the reconnection of anisotropic joint open and closed orbits.