Register to reply

Landauer formula

by aaaa202
Tags: formula, landauer
Share this thread:
aaaa202
#1
Jan2-14, 02:55 PM
P: 1,005
Consider a source and a drain connected by a wire. When a voltage is applied the chemical potential of source and drain are shifted relative to each such that:
μ_source = μ_drain + eV
now, one crucial step in deriving the Landauer formula for a system like this is to, as indicated in the link http://www.gianlucafiori.org/qpc/node7.html, to realize that the fermi functions for source and drain are different and that the current going to the right and left respectively are given as integrals of the fermi function. Now, why is this exactly? It is not like the source has more electrons than the drain. Is it because they are moving faster?
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

Register to reply

Related Discussions
Entropy increase,coarse-grained vs. Landauer's principle justification Classical Physics 3
Question regarding empirical formula and molecular formula(finding 2 variables)A Lvel Biology, Chemistry & Other Homework 3
Formula help needed... algebraic formula for intra-interval rate of acceleration General Math 2
Landauer formula in 1D Atomic, Solid State, Comp. Physics 2