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nbo10
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What is fermi surface nesting? I don't have a hard reference, but I've heard this term thrown around quite a bit lately when talking about SDW, CDW, and SC.
nbo10 said:What is fermi surface nesting? I don't have a hard reference, but I've heard this term thrown around quite a bit lately when talking about SDW, CDW, and SC.
Fermi surface nesting and SDW, CDW interests physisists mainly of existence of phase transition to gap state in some direction.sam_bell said:Can anyone elaborate on the connection between fermi surface nesting and SDW, CDW, etc. ? This has me kind-of puzzled too.
genneth said:Generally, the Fermi liquid is very unstable because it has such a large density of states near the Fermi level.
vkroom said:Are you sure? Fermi liquid theory works so well because of its stability to perturbations. For generic momenta even four fermion interactions are irrelevant. Only the Cooper channel makes four fermion interactions marginal and hence we get superconductors. This is one of the very few instabilities of a Fermi liquid.
Nesting is another such instability. Density waves result from effective period doubling of the crystal lattice, which is a response of the Fermi liquid to avert the nesting instability.
genneth said:The feeling I get from the gurus on this matter seems to be that serious work involving hard maths (algebraic geometry and the like) would be needed to start making dents on this issue...
Fermi Surface Nesting is a phenomenon in solid state physics where two parts of the Fermi surface overlap, resulting in a high density of states and potentially leading to electronic instabilities or phase transitions.
Fermi Surface Nesting occurs when there is a strong overlap between two parts of the Fermi surface, typically due to the symmetry of the crystal structure or the electronic band structure.
Fermi Surface Nesting has been studied in various materials for its potential applications in superconductivity, charge density waves, and other electronic instabilities. It can also provide insights into the electronic properties and behavior of materials.
Various experimental techniques such as angle-resolved photoemission spectroscopy (ARPES), x-ray diffraction, and magnetotransport measurements can be used to study the Fermi surface and identify nesting regions. Theoretical calculations and simulations are also commonly used to study Fermi Surface Nesting.
Fermi Surface Nesting is a natural phenomenon that occurs in materials with specific electronic and structural properties. While it cannot be directly controlled or manipulated, understanding and studying it can provide insights into the electronic properties and potential applications of materials.