Sarker, Sanjoy K. ; Jayaprakash, C. ; Krishnamurthy, H. R. (1994) Non-fermi liquid behavior in a mean-field study of the t-J model: role of zero-point spin fluctuations Physica C: Superconductivity, 228 (3-4). pp. 309-318. ISSN 0921-4534
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/092145...
Related URL: http://dx.doi.org/10.1016/0921-4534(94)90420-0
Abstract
We present analytic results to show that the Schwinger-boson hole-fermion mean-field state exhibits non-Fermi liquid behavior due to spin-charge separation. The physical electron Green's function consists of three additive components. (a) A Fermi-liquid component associated with the bose condensate. (b) A non-Fermi liquid component which has a logarithmic peak and a long tail that gives rise to a linear density of states that is symmetric about the Fermi level and a momentum distribution function with a logarithmic discontinuity at the Fermi surface. (c) A second non-Fermi liquid component associated with the thermal bosons which leads to a constant density of states. It is shown that zero-point fluctuations associated with the spin-degrees of freedom are responsible for the logarithmic instabilities and the restoration of particle-hole symmetry close to the Fermi surface.
Item Type: | Article |
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ID Code: | 17641 |
Deposited On: | 16 Nov 2010 12:56 |
Last Modified: | 06 Jun 2011 05:52 |
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