Questions tagged [fermi-liquids]
Fermi liquid theory (also known as Landau–Fermi liquid theory) is a theoretical model of interacting fermions that describes the normal state of most metals at sufficiently low temperatures. The phenomenological theory of Fermi liquids was introduced by the Soviet physicist Lev Davidovich Landau in 1956.
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Spin of quasi-particles in a Fermi Liquid à la Landau
I'm having troubles with understanding the motivation underlying the fact that a quasi-particle in a Fermi liquid à la Landau alway has spin 1/2. In section 1.1 of Landau's Theoretical Physics, volume ...
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What is a marginal fermi liquid in a nutshell?
I would like to know what are the main differences between the normal Fermi liquid theory and a marginal fermi liquid theory. What kind of systems can be described by the marginal liquid theory? What ...
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What is invalidated when turning on many body interactions in a crystal?
I have just started to think about strongly interacting particles and Fermi liquid theory, and I have two questions.
For non interacting particles moving in an potential field, we know that the ...
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Self-energy of a Fermi liquid
A weakly correlated many-electron system can be viewed in a first approximation as a Fermi liquid, meaning that it behaves similarly to a non-interacting electron gas with renormalized parameters.
In ...
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Properties of materials _not_ dependent on fermi surface?
So I'm studying a second solid state physics course where we've covered calculating things like magnetic susceptibility, specific heat and resistivity by considering excitations of electrons around ...
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Specific Heat of a Fermi Liquid
Let me give a bit of context before asking the actual questions:
In the second edition of Condensed Matter Physics, Michael P. Marder derives the specific heat of Fermi liquids in chapter 17.5.4.
He ...
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Landau's fermi liquid theory: With four parameters I can fit an elephant, and with five I can make him wiggle his trunk!
I have no intention of mocking Landau's theory by the quote of John von Neumann (Attributed to von Neumann by Enrico Fermi). I want to understand why we are saying this theory of Landau is remarkably ...
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Is that possible to derive Landau-Fermi liquid theory from microscopic equation?
This question arises from reading Wen's book "Quantum Field Theory of Many-body Systems (Oxford 2004)" p204
To appreciate the brilliance of Landau-Fermi liquid theory, let us look at the
many-...
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Strong interacting v.s. Strong Coupling v.s. Strong Correlated
One of the active research areas in present is Strong interacting, Strong Coupling, Strong Correlated regime of the phases of matters.
It seems to me that some physicists in the fields often mix the ...
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No Lagrangian description v.s. No quasi-particle description
This post is aimed to stimulate some discussions.
We are familiar with many physical descriptions and theories of the (many-body quantum) system, with both quasi-particle description and Lagrangian ...
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