Spin fluctuation effects on a quasi-2D itinerant electron system : a microscopic model for the marginal Fermi liquid

1992 ◽  
Vol 2 (10) ◽  
pp. 1853-1860 ◽  
Author(s):  
S. Charfi-Kaddour ◽  
R. J. Tarento ◽  
M. Héritier
Keyword(s):  
Fermi Liquid ◽  
Spin Fluctuation ◽  
Electron System ◽  
Microscopic Model ◽  
Itinerant Electron ◽  
System A ◽  
Marginal Fermi Liquid ◽  
Fluctuation Effects

ZERO—POINT SPIN FLUCTUATION EFFECTS IN ANHARMONIC WEAK ITINERANT ELECTRON MAGNETS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 585-588 ◽  
Author(s):  
ALEXANDER SOLONTSOV
Keyword(s):  
Inelastic Neutron Scattering ◽  
Spin Fluctuation ◽  
Landau Theory ◽  
Zero Point ◽  
Thermal Fluctuations ◽  
Inelastic Neutron ◽  
Spin Fluctuations ◽  
Itinerant Electron ◽  
Fluctuation Effects

The spin fluctuation theory of weak itinerant magnets is critically reviewed and is shown to be well established in the weak spin anharmonicity limit. A new self—consistent approach is formulated in terms of the Landau theory of phase transitions to account for zero—point and thermal fluctuations in anharmonic itinerant magnets. The role of spin fluctuations and Fermi excitations in MnSi, Ni3Al and ZrZn2 is discussed using the inelastic neutron scattering experiments.

A DOMAIN MODEL OF CUPRATES

1994 ◽  
Vol 08 (22) ◽  
pp. 3083-3094 ◽  
Author(s):  
V. DALLACASA
Keyword(s):  
Fermi Liquid ◽  
Characteristic Length ◽  
Domain Model ◽  
Linear Temperature Dependence ◽  
Arbitrary Length ◽  
Linear Temperature ◽  
Bcs Model ◽  
Marginal Fermi Liquid ◽  
System Length ◽  
Enhanced Superconductivity

We have investigated the occurrence of superconductivity in a Fermi liquid of finite volume, under the assumption of a sharp surface, by solving numerically (at arbitrary length) and analytically (at the smallest lengths) the Cooper–BCS model. We find that this model can predict enhanced superconductivity with respect to the bulk BCS model when the system length L ≪ L0, in which L0 is a characteristic length. Under the same conditions the normal state is found to behave anomalously with respect to the conventional Fermi liquid, with a linear temperature dependence of the resistivity and marginal Fermi liquid properties. The results are used to implement a domain model of high T c superconductors.

scholarly journals Transport Anomalies and Marginal-Fermi-Liquid Effects at a Quantum Critical Point

2000 ◽  
Vol 85 (21) ◽  
pp. 4602-4605 ◽  
Author(s):  
D. Belitz ◽  
T. R. Kirkpatrick ◽  
R. Narayanan ◽  
Thomas Vojta
Keyword(s):  
Critical Point ◽  
Fermi Liquid ◽  
Quantum Critical Point ◽  
Marginal Fermi Liquid ◽  
Quantum Critical
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