Pomeranchuk instabilities
WebJan 25, 2024 · The key idea of our approach is to assume a uniform circular Fermi liquid state made up of fermions with density operator \({\overline{\rho }}(\vec {k})\) and … WebMay 10, 2002 · Therefore, the investigation of interplay and rivalry between the Pomeranchuk instability and ferromagnetism, and other phases in the 2D t− t′ Hubbard model at the Van Hove filling is a considerable task. We will consider the leading instabilities depending on the ratio U /t (in all papers cited above it was fixed).
Pomeranchuk instabilities
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WebIn the present paper we extend the method to detect Pomeranchuk instabilities in lattice systems developed in previous works to study more general situations. The main result … WebCompetition between Pomeranchuk instabilities in the nematic and hexatic channels in a two-dimensional spinless Fermi fluid Daniel G. Barci,1 Marta Trobo,2,3 Victoria Ferna´ndez,2,3 and Luis E. Oxman4 1Departamento de F´ısica Teorica Universidade do Estado do Rio de Janeiro. Rua S˜ao Francisco Xavier 524, 20550-013, Rio de Janeiro, RJ ...
The Pomeranchuk instability is an instability in the shape of the Fermi surface of a material with interacting fermions, causing Landau’s Fermi liquid theory to break down. It occurs when a Landau parameter in Fermi liquid theory has a sufficiently negative value, causing deformations of the Fermi surface to be … See more In a 3D isotropic Fermi liquid, consider small density fluctuations $${\textstyle \delta n_{k}=\Theta ( k -p_{\mathrm {F} })-\Theta ( k -p_{\mathrm {F} }'({\hat {k}}))}$$ around the Fermi momentum $${\textstyle p_{\mathrm {F} }}$$, … See more • Kohn anomaly • Pomeranchuk's theorem • Lindhard theory See more The Pomeranchuk instability manifests in the dispersion relation for the zeroth sound, which describes how the localized fluctuations of the momentum density function $${\textstyle \delta n_{k}}$$ propagate through space and time. Just as the … See more WebPomeranchuk instabilities in the particle-hole channel with nonzero angular momentum. This point of view has been the focus of much recent work, both in continuum …
WebPomeranchuk Instability - Department of Physics WebGeneralized Pomeranchuk instabilities in graphene C.A. Lamas,1 D.C. Cabra,1,2,3 and N. Grandi1 1Departamento de F´ısica, Universidad Nacional de La Plata, Casilla de Correos 67, 1900 La Plata, Argentina 2Laboratoire de Physique Th´eorique, Universit´e Louis Pasteur, 3 Rue de l’Universit´e, 67084 Strasbourg, C´edex, France.
WebSep 28, 2006 · We address at the mean field level the emergence of a Pomeranchuk instability in a uniform Fermi liquid with central particle-particle interactions. We find that …
WebMay 1, 2024 · A bstract We develop a method to detect instabilities leading to nematic phases in strongly coupled metallic systems. We do so by adapting the well-known … birch tea bagsWebApr 7, 2024 · Fig. 3: Isospin Pomeranchuk effect and spin entropy. a, ρxx as a function of ν0 and Btot oriented at an angle of 9.1° relative to the sample plane, measured at 5 K and 10 … dallas news obituaries todayWebApr 13, 2024 · Finally, there are some phenomena that have only been observed in twisted stacks, such as Chern insulators 103,104,105,106,107,108,109, nematicity 110, Pomeranchuk effect 111,112 or re-entrant ... dallas news obits todayWebWe study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (F{sub l}{sup a} (l > 0)). The ordered phases are classified into two classes, dubbed the {alpha} and {beta}-phases by analogy to the superfluid {sup 3}He-A and B-phases. The Fermi surfaces in the {alpha}-phases exhibit spontaneous anisotropic … dallas newspaper classifieds rentWebMay 15, 2024 · Such constraints forbid certain Pomeranchuk instabilities of a FL, e.g., towards phases with order parameters that coincide with charge and spin currents. We provide diagrammatic derivations of these constraints and of the general (Leggett) formula for the susceptibility in arbitrary angular momentum channel, and illustrate the general … dallasnews sportsWebAug 1, 2014 · We approach the instabilities from the ordered ferromagnetic phase. We find “quantum multi-criticality” as approach to the ferromagnetic instability drives instability in … dallas newspaper sports sectionWebWe study the effect of weak and dilute disorder on the order parameter equation and transition temperature of a Pomeranchuk-type Fermi-surface instability using replica … dallas news nbc 5