Spin-gapped incoherent metal with preformed pairing in the doped antiferromagnetic Mott insulator

2007/02/28 by Ki-Seok Kim, Ki‐Seok Kim, Mun Dae Kim
Physics and Astronomy · #Antiferromagnetism #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Electrical resistivity and conductivity #Metal–insulator transition #Mott insulator #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin liquid #Spin (aerodynamics) #Spin polarization #Superconductivity #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.77.125103

published as Phys. Rev. B 77, 125103 (2008)

arxiv created 2007/08/13 · openalex publication_date 2008/03/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate how the antiferromagnetic Mott insulator evolves into the d-wave BCS superconductor through hole doping. Allowing spin fluctuations in the strong-coupling approach, we find a spin-gapped incoherent metal with preformed pairing as an intermediate phase between the antiferromagnetic Mott insulator and d-wave superconductor. This non-Fermi-liquid metal is identified with an infrared stable fixed point in the spin-decomposition gauge theory, analogous to the spin liquid insulator in the slave-boson gauge theory. We consider the single particle spectrum and dynamical spin susceptibility in the anomalous metallic phase, and discuss physical implications.

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