Role of symmetry and dimension in pseudogap phenomena

S. Allen; H. Touchette; S. Moukouri; Y. M. Vilk; A. M.S. Tremblay

doi:10.1103/PhysRevLett.83.4128

Role of symmetry and dimension in pseudogap phenomena

S. Allen, H. Touchette, S. Moukouri, Y. M. Vilk, A. M.S. Tremblay

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Abstract

The attractive Hubbard model in d = 2 is studied through Monte Carlo simulations at intermediate coupling. There is a crossover temperature T_X where a pseudogap appears with concomitant precursors of Bogoliubov quasiparticles that are not local pairs. The pseudogap in A(k_F, ω) occurs in the renormalized classical regime when the correlation length is larger than the direction-dependent thermal de Broglie wavelength, ξ_th=ħv_F(k)/k_BT. The ratio T_X/T_c for the pseudogap may be made arbitrarily large when the system is close to a point where the order parameter has SO(n) symmetry with n > 2. This is relevant in the context of SO(5)theories of high T_c but has more general applicability.

Original language	English
Pages (from-to)	4128-4131
Number of pages	4
Journal	Physical Review Letters
Volume	83
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.83.4128
State	Published - 1 Jan 1999
Externally published	Yes

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General Physics and Astronomy

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title = "Role of symmetry and dimension in pseudogap phenomena",

abstract = "The attractive Hubbard model in d = 2 is studied through Monte Carlo simulations at intermediate coupling. There is a crossover temperature TX where a pseudogap appears with concomitant precursors of Bogoliubov quasiparticles that are not local pairs. The pseudogap in A(kF, ω) occurs in the renormalized classical regime when the correlation length is larger than the direction-dependent thermal de Broglie wavelength, ξth=ħvF(k)/kBT. The ratio TX/Tc for the pseudogap may be made arbitrarily large when the system is close to a point where the order parameter has SO(n) symmetry with n > 2. This is relevant in the context of SO(5)theories of high Tc but has more general applicability.",

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AU - Allen, S.

AU - Touchette, H.

AU - Moukouri, S.

AU - Vilk, Y. M.

AU - Tremblay, A. M.S.

PY - 1999/1/1

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N2 - The attractive Hubbard model in d = 2 is studied through Monte Carlo simulations at intermediate coupling. There is a crossover temperature TX where a pseudogap appears with concomitant precursors of Bogoliubov quasiparticles that are not local pairs. The pseudogap in A(kF, ω) occurs in the renormalized classical regime when the correlation length is larger than the direction-dependent thermal de Broglie wavelength, ξth=ħvF(k)/kBT. The ratio TX/Tc for the pseudogap may be made arbitrarily large when the system is close to a point where the order parameter has SO(n) symmetry with n > 2. This is relevant in the context of SO(5)theories of high Tc but has more general applicability.

AB - The attractive Hubbard model in d = 2 is studied through Monte Carlo simulations at intermediate coupling. There is a crossover temperature TX where a pseudogap appears with concomitant precursors of Bogoliubov quasiparticles that are not local pairs. The pseudogap in A(kF, ω) occurs in the renormalized classical regime when the correlation length is larger than the direction-dependent thermal de Broglie wavelength, ξth=ħvF(k)/kBT. The ratio TX/Tc for the pseudogap may be made arbitrarily large when the system is close to a point where the order parameter has SO(n) symmetry with n > 2. This is relevant in the context of SO(5)theories of high Tc but has more general applicability.

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Role of symmetry and dimension in pseudogap phenomena

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