Absence of Fermi surface reconstruction in pressure-driven overdoped YBCO

2023/12/03 by S. W. Tozer, Tozer, Stanley W., William A. Coniglio +13
Physics and Astronomy · #Advanced Chemical Physics Studies #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.2312.01439

openalex publication_date 2023/12/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

The evolution of the critical superconducting temperature and field, quantum oscillation frequencies and effective mass m^* in underdoped YBa₂Cu₃O_7-δ (YBCO) crystals (p = 0.11, with p the hole concentration per Cu atom) points to a partial suppression of the charge orders with increasing pressure up to 7 GPa, mimicking doping. Application of pressures up to 25 GPa pushes the sample to the overdoped side of the superconducting dome. Contrary to other cuprates, or to doping studies on YBCO, the frequency of the quantum oscillations measured in that pressure range do not support the picture of a Fermi-surface reconstruction in the overdoped regime, but possibly point to the existence of a new charge order.

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