Spin correlations in the algebraic spin liquid: Implications for high-T-c superconductors

Article

关键词: VALENCE BOND STATE;    LARGE-N LIMIT;    J MODEL;    GAUGE-THEORY;    GAP;    FLUCTUATIONS;    TEMPERATURE;    SUSCEPTIBILITY;    EXCITATIONS;    TRANSITION;   

DOI  :  10.1103/PhysRevB.66.144501

来源: SCIE

【 摘 要 】

We propose that underdoped high-T-c superconductors are described by an algebraic spin liquid (ASL) at high energies, which undergoes a spin-charge recombination transition at low energies. The spin correlation in the ASL is calculated via its effective theory-a system of massless Dirac fermions coupled to a U(1) gauge field. We find that without fine-tuning any parameters the gauge interaction strongly enhances the staggered spin correlation even in the presence of a large single-particle pseudogap. This allows us to show that the ASL plus spin-charge recombination picture can explain many highly unusual properties of underdoped high-T-c superconductors.

【 授权许可】

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