Number of holes contained within the Fermi surface volume in underdoped high-temperature superconductors

Article

关键词: T-C SUPERCONDUCTOR;    DENSITY-WAVE ORDER;    QUANTUM OSCILLATIONS;    CUPRATE SUPERCONDUCTOR;    CHARGE ORDER;    YBA2CU3O6.67;    TRANSITION;    PSEUDOGAP;    TRANSPORT;    INSULATOR;   

DOI  :  10.1103/PhysRevB.94.085129

来源: SCIE

【 摘 要 】

We provide a potential solution to the longstanding problem relating Fermi surface reconstruction to the number of holes contained within the Fermi surface volume in underdoped high T-c superconductors. On considering uniaxial and biaxial charge-density wave order, we show that there exists a relationship between the ordering wave vector, the hole doping, and the cross-sectional area of the reconstructed Fermi surface whose precise form depends on the volume of the starting Fermi surface. We consider a large starting Fermi surface comprising 1 + p hole carriers, as predicted by band structure calculations, and a small starting Fermi surface comprising p hole carriers, as proposed in models in which the Coulomb repulsion remains the dominant energy. Using the reconstructed Fermi surface cross-sectional area obtained in quantum oscillation experiments in YBa2Cu3O6+x and HgBa2CuO4+x and the established methods for estimating the chemical hole doping, we find the ordering vectors obtained from x-ray scattering measurements to show a close correspondence with those expected for the small starting Fermi surface. We therefore show the quantum oscillation frequency and charge-density wave vectors provide accurate estimates for the number of holes contributing to the Fermi surface volume in the pseudogap regime.

【 授权许可】

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