A quasi Fermi level (also called imref, which is "fermi" spelled backwards) is a term used in quantum mechanics and especially in solid state physics for the Fermi level (chemical potential of electrons) that describes the population of electrons separately in the conduction band and valence band, when their populations are displaced from equilibrium. This displacement could be caused by the application of an external voltage, or by exposure to light of energy , which alter the populations of electrons in the conduction band and valence band. Since recombination rate (the rate of equilibration between bands) tends to be much slower than the energy relaxation rate within each band, the conduction band and valence band can each have an individual population that is internally in equilibrium, even though the bands are not in equilibrium with respect to exchange of electrons. The displacement from equilibrium is such that the carrier populations can no longer be described by a single Fermi level, however it is possible to describe using concept of separate quasi-Fermi levels for each band. (Wikipedia).
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From playlist Electronics I: Semiconductor Physics and Devices
Fermi Inversion Factor Part 2 - Fermi Level Splitting
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From playlist Optoelectronic and Photonic Devices
JEE Main Physics E & M #39 Extrinsic Semiconductors
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 For extrinsic semiconductors; when doping levels are increased A) Fermi-level of P and n-type semiconductors will not be affected. B)
From playlist THE "WHAT IS" PLAYLIST
Fermi Level Splitting Explained
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From playlist Optoelectronic and Photonic Devices
2020 Theory Winter School: Liang Fu
Topic: High-order Van Hove singularity and it’s consequences For more information on the 2020 Theory Winter School: https://nationalmaglab.org/news-events/events/for-scientists/winter-theory-school
From playlist 2020 Theory Winter School
Quantum Phases of Matter XXII - Fractionalized metallic phases in the single band - Subir Sachdev
Joint Course with TIFR, IAS and ICTS Quantum Phases of Matter XXII - Fractionalized metallic phases in the single band Hubbard model - Subir Sachdev Speaker: Subir Sachdev Date: December 01, 2021 Table of Contents (powered by https://videoken.com) 0:00:00 Start 0:00:15 Introduction 0:0
From playlist The Quantum Phases of Matter by Subir Sachdev
Fermi-Dirac Integral Explained
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From playlist Electronics I: Semiconductor Physics and Devices
Quantum Transport, Lecture 13: Superconductivity
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: basics of superconductivity, Cooper pairing, energy gap, Andreev reflection. Quantum Transport course development supported in part by the National Science Foundation under grant DM
From playlist Quantum Transport
MagLab User Summer School: Measuring Fermi Surfaces in Extreme Magnetic Fields
This video was recorded in 2016 at the National MagLab’s annual User Summer School, where early-career scientists learn from lab experts best practices for conducting experiments at the lab. For more information, please visit https://nationalmaglab.org/user-summer-school
From playlist User Summer School Talks
The Quantum Phases of Matter V - Quasiparticle lifetime; Superexchange interactions - Subir Sachdev
Joint Course with TIFR and IAS Topic: The Quantum Phases of Matter V Speaker: Subir Sachdev Affiliation: Harvard University; Member, School of Natural Sciences, IAS Date: September 20, 2021
From playlist Joint Course with TIFR and IAS
2020 Theory Winter School: Leonid Levitov (pt 2)
Topic: Symmetry-protected long-lived excitations in 2D electron fluids Part 2 For more information on the 2020 Theory Winter School: https://nationalmaglab.org/news-events/events/for-scientists/winter-theory-school
From playlist 2020 Theory Winter School
Solid State Physics in a Nutshell: Topic 10-3: Fermi Level
In this video, we consider how the density of states alters the temperature dependence of the Fermi level and establish the n*p product rule.
From playlist CSM: Solid State Physics in a Nutshell | CosmoLearning.org Physics
MagLab Theory Winter School 2018: Subir Sachdev - The SYK Model
The National MagLab held it's sixth Theory Winter School in Tallahassee, FL from January 8th - 13th, 2018.
From playlist 2018 Theory Winter School