PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS

Dahm T, TEWORDT L (1995)
PHYSICAL REVIEW B 52(2): 1297-1308.

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Autor*in
Dahm, ThomasUniBi; TEWORDT, L
Abstract / Bemerkung
We have calculated within the fluctuation exchange approximation the full momentum and real-frequency dependence of the quasiparticle self-energy, the gap function, and the dynamic spin susceptibility for the two-dimensional Hubbard model near half filling. The spin-density-wave (SDW) instability is reached only asymptotically in the limit of infinite U or zero temperature. Near the SDW instability we find approximately marginal Fermi-liquid behavior, a pseudogap in the density of states, and a singlet d(x)2(-gamma)2 pairing instability. Below T-c, gaps open rapidly in the frequency spectra of the gap function, the quasiparticle scattering rate, and the density of states. The spectral density of the dynamic spin susceptibility agrees qualitatively with the neutron-scattering data on La2-xSrxCuO4. The quasiparticle scattering rate and spin-lattice relaxation rate T-1(-1) decrease rapidly below T-c. The photoemission intensities along the antinode and node of the gap are in good agreement with the angle-resolved photoemission spectroscopy data on Bi 2212. Including next-nearest-neighbor hopping we obtain for sufficiently large coupling (U/t greater than or similar to 7) a broad commensurate neutron-scattering peak like the observed one in YBa2Cu3O6+x.
Erscheinungsjahr
1995
Zeitschriftentitel
PHYSICAL REVIEW B
Band
52
Ausgabe
2
Seite(n)
1297-1308
ISSN
0163-1829
eISSN
1095-3795
Page URI
https://pub.uni-bielefeld.de/record/2330412

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Dahm T, TEWORDT L. PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS. PHYSICAL REVIEW B. 1995;52(2):1297-1308.
Dahm, T., & TEWORDT, L. (1995). PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS. PHYSICAL REVIEW B, 52(2), 1297-1308. https://doi.org/10.1103/PhysRevB.52.1297
Dahm, T., and TEWORDT, L. (1995). PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS. PHYSICAL REVIEW B 52, 1297-1308.
Dahm, T., & TEWORDT, L., 1995. PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS. PHYSICAL REVIEW B, 52(2), p 1297-1308.
T. Dahm and L. TEWORDT, “PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS”, PHYSICAL REVIEW B, vol. 52, 1995, pp. 1297-1308.
Dahm, T., TEWORDT, L.: PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS. PHYSICAL REVIEW B. 52, 1297-1308 (1995).
Dahm, Thomas, and TEWORDT, L. “PHYSICAL QUANTITIES IN NEARLY ANTIFERROMAGNETIC AND SUPERCONDUCTING STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL AND COMPARISON WITH CUPRATE SUPERCONDUCTORS”. PHYSICAL REVIEW B 52.2 (1995): 1297-1308.

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