Quantum oscillations in the hole-doped cuprates and the confinement of spinons

• 成果类型: Article
• 署名作者: Bonetti, Pietro M.; Christos, Maine; Sachdev, Subir
• 署名单位: Harvard University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-9476
• DOI: 10.1073/pnas.2418633121
• 发表日期: 2024-12-10
• 关键词: high-temperature superconductor; fermi-surface; quasi-particles; ground-states; metal; excitations; EVOLUTION

摘要

A long-standing problem in the study of the under-hole-doped cuprates has been the description of the Fermi surfaces underlying the high magnetic field quantum oscillations, and their connection to the higher temperature pseudogap metal. Harrison and Sebastian [ Phys. Rev. Lett. 106, 226402 (2011)] proposed that the pseudogap Fermi arcs are reconstructed into an electron pocket by field-induced charge density wave order. But computations on such a model [Zhang and Mei, Europhys. Lett. 114, 47008 (2016)] show an unobserved additional oscillation frequency from a Fermi surface arising from the backsides of the hole pockets completing the Fermi arcs. We describe a transition from a fractionalized Fermi liquid (FL*) model of the pseudogap metal, to a metal with bidirectional charge density wave order without fractionalization. We show that the confinement of the fermionic spinon excitations of the FL* across this transition can eliminate the unobserved oscillation frequency.