Why is the exciton binding energy slightly smaller than the band …
2016年12月7日 · I might suggest looking at Jacques Pankove's excellent 'Optical Processes in Semiconductors', where excitons are introduced on page 12. Some relevant quotes to …
Excitons in metals-do they exist? - Physics Stack Exchange
Excitons are a transient response of metals to optical excitation. For early experimental and theoretical ...
Excitons - Increase in absorption - Physics Stack Exchange
2020年10月13日 · This neutral bond pair is called an exciton." My understanding is - We first need to supply E > Eg for excitons to form. Once excitons exist in a material, they facilitate the …
quantum mechanics - What are dark excitons and how to find …
2019年3月18日 · Dark excitons can therefore actually be thought of as three-particle complexes consisting of an electron, a hole and a phonon. As experiments are conducted at finite …
Spin and wavefunction of Excitons - Physics Stack Exchange
2022年2月3日 · Excitons are quasi-particles made by a bound electron-hole pair. In general one refers to exciton as spin conserving excitations. In case spin is a good quantum number, the …
Energy of exciton formation in semiconductors
2020年10月20日 · As we increase the energy that we supply to the material in the form of photonic energy we can force the material to form excitons with n = 2 (using photon energy of …
condensed matter - Why are excitons not found in metals?
2017年1月11日 · But excitons in metals had been able to be not observed so far, since the life time is so short. That is about a few femtoseconds. Recently, it has been reported that …
optics - Why is an exciton only observed when we excite to the ...
Excitons can be observed when we excite electrons to the conduction band. I don't know about excitons being observed when we excite the electrons to an electronic level that would …
How to understand exciton? - Physics Stack Exchange
2017年10月28日 · Sorted by: An exciton really is a electron coupled to a hole, just as you said. A electron gets excited to a higher band, leaving a hole in the lower band behind (a bit like a …
quantum mechanics - exciton binding energy and orbital binding …
2016年3月22日 · The binding energy of an exciton is not the energy released when they recombine; it is the energy required to create a free electron and hole from it. The electron and …