Effective mass Definition and 65 Threads

Could somebody tell what is connection between effective mass of electron and its energy? As I know rest energy of electron is about 500 KeV what is pretty big. In some materials effective mass of electron is one thousand of its rest mass. Could we create some energy storage device which...

The literature i have on the origins / need for an effective mass of electrons seems only to relate it to the explanation of heat capacity of metals but it seems like the concept has applications far beyond this. Can someone pls provide a more general summary of its derivation and applications...

Hi all, according to textbook definition the effective mass of a particle in a periodic potential is \frac{\hbar^2}{m*} = \frac{d^2}{d k^2} E(k) where E(k) is the energy dispersion. Is this definition applicable at a generic point of a band, or only at the center and edge of the Brillouin...

in indirect band gap semiconductors ,the effective mass isn't constant , because of the anisotropie of this effective mass there are (longitidinal and transversal effective mass). for calculate the optical parameters in semiconductor , i need electron and hole effective masses , what the value...

Homework Statement In chapter 8, page 207 Kittel derives an equation for the fermi level in an intrinsic conductor: \mu=½Eg + \frac{3}{4}kBT*ln(me/mh) How am I to understand the ln(me/mh) part? Earlier he states that the effective mass is proportional to the curvature of the energy band...

Hello- I feel that this is a "graduate-level" question, so I hope that this question is not found to be insultingly easy. Can someone help me gain an understanding of why bandgap and electron effective mass in semiconductors are proportional to one another (e.g. trend of C, Si, Ge...

Hallo ... I would like to know about the effect of the effective mass on the band structre of the materails..

what is effective mass? and how does it effect both the electrical and optical properties of a crystaline structure?

If effective mass in schrodinger equation takes into account for coupling by other bands or so to say by other electrons, and in this way we don't care about effect of other electrons and deal with lattice potential.

Homework Statement Here is the problem: http://img413.imageshack.us/img413/748/64my8.th.jpg The Attempt at a Solution I got the effective mass. That's trivial. My question is, what are these graphs actually of? The horizontal and vertical axes are not labeled. Is it an energy...

could anyone elucidate on how Ashcroft and Mermin get \sqrt{\frac{det M}{M_{zz}}} for the cyclotron effective mass (page 571)? Is this true for all energy contours or only certain ones? And if that's the case which because they don't seem to specify? thanks.

Hello, I am a junior undergrad taking an advanced senior/1st yr grad lab. I've been having some difficulty with a few points in the lab materials we were given (we are analyzing the reflectance spectra for GaAs/AlGaAs quantum wells). We were given the effective mass of the electrons, heavy and...

Can anyone explains the concept of effective mass in solid state physics to me? Thanks a lot~:smile:

Homework Statement Calculate the effective mass for a free electron. Homework Equations The Attempt at a Solution I know the above equation comes from, in the case of the free electron dispersion relation, . However I'm not at all sure how to go about calculating it for a...

Does anyone have a link or reference to a table on the effective mass of electrons in the common metals? thanks