Anomalous Fermi liquid and strong-coupling superconductivity in cuprates

1996 ◽  
Vol 46 (S2) ◽  
pp. 939-940
Author(s):  
A. Sherman ◽  
M. Schreiber
Keyword(s):  
Strong Coupling ◽  
Fermi Liquid

Transverse spin waves in normal and superfluid 3He

1987 ◽  
Vol 65 (11) ◽  
pp. 1330-1335 ◽  
Author(s):  
D. Candela ◽  
D. O. Edwards ◽  
A. Heff ◽  
N. Masuhara ◽  
D. S. Sherrill ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Spin Wave ◽  
Fermi Liquid ◽  
Spin Waves ◽  
Wave Spectrum ◽  
Superfluid 3He ◽  
Transverse Spin ◽  
Published Data ◽  
Normal Liquid ◽  
Spin Wave Spectrum

After a brief review of experiment and theory for transverse spin waves in normal liquid 3He, we compare previously published data at 0, 6.3, and 12.3 bar (1 bar = 100 kPa) in superfluid 3He–B with a new version of the theory of Combescot for the spin-wave spectrum. The new theory includes the Fermi-liquid parameters [Formula: see text] and [Formula: see text] (as well as [Formula: see text], which was in the old version). The equations give an excellent fit to the data at 0 bar using values of [Formula: see text] and [Formula: see text] from the normal liquid, and [Formula: see text] from the B-phase susceptibility. At 6.3 bar, the fit is not quite so good, perhaps because of nontrivial strong-coupling effects. At 12.3 bar, the experimental uncertainties make the comparison inconclusive.

Exchange-Correlation Energy Densities and Response Potentials: Connection Between Two Definitions and Analytical Model for the Strong-Coupling Limit of a Stretched Bond

2019 ◽  
Author(s):  
S. Giarrusso ◽  
Paola Gori-Giorgi
Keyword(s):  
Density Functional Theory ◽  
Strong Coupling ◽  
Density Functional ◽  
Correlation Energy ◽  
Order Term ◽  
Strong Coupling Limit ◽  
Local Form ◽  
Coupling Constant ◽  
Functional Theory ◽  
Exchange Correlation

We analyze in depth two widely used definitions (from the theory of conditional probablity amplitudes and from the adiabatic connection formalism) of the exchange-correlation energy density and of the response potential of Kohn-Sham density functional theory. We introduce a local form of the coupling-constant-dependent Hohenberg-Kohn functional, showing that the difference between the two definitions is due to a corresponding local first-order term in the coupling constant, which disappears globally (when integrated over all space), but not locally. We also design an analytic representation for the response potential in the strong-coupling limit of density functional theory for a model single stretched bond.<br>

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