Register to reply

Regime of Fermi gas or liquid?

by SadScholar
Tags: fermi, liquid, regime
Share this thread:
SadScholar
#1
Mar16-12, 09:37 PM
P: 35
Hi, I was wondering if anyone could clarify for me what the correct regime is for treating the electrons in a material as a Fermi gas. When is it that you must use Fermi liquid theory?
Phys.Org News Partner Physics news on Phys.org
Interfaces within materials can be patterned as a means of controlling the properties of composites
A new, tunable device for spintronics
Researchers study gallium to design adjustable electronic components
vkroom
#2
Mar26-12, 12:39 AM
P: 27
In general Fermi liquid description is valid when

1. the interaction is short ranged.
2. the interaction energy scale is smaller than the kinetic energy of the electrons.

Although for short range interactions one can still get fermi liquids at relatively high (interaction energy) / (kinetic energy) ratio, for example in heavy fermion compunds, it is unclear to me where the limit of this ratio exactly lies.
SadScholar
#3
Mar27-12, 01:31 PM
P: 35
Ah ok. Thanks for your help!


Register to reply

Related Discussions
Fermi Energy of Liquid He3 Advanced Physics Homework 1
Fermi-Dirac statistics at the Fermi level Atomic, Solid State, Comp. Physics 17
Fermi energy and quasi-Fermi energies in pn-junctions Atomic, Solid State, Comp. Physics 0
Band structure and fermi liquid Atomic, Solid State, Comp. Physics 1
Fermi Gas Model / Fermi energy and momentum High Energy, Nuclear, Particle Physics 1