Dephasing Due to Carrier-Carrier Scattering in 2D

Current relaxation due to hot carrier scattering in graphene

In this paper, we present direct time-domain investigations of the relaxation of electric currents in graphene due to hot carrier scattering. We use coherent control with ultrashort optical pulses to photoinject a current and detect the terahertz (THz) radiation emitted by the resulting current surge. We pre-inject a background of hot carriers using a separate pump pulse, with a variable delay ...

Dephasing times in quantum dots due to elastic LO phonon-carrier collisions

Interpretation of experiments on quantum dot (QD) lasers presents a challenge: the phonon bottleneck, which should strongly suppress relaxation and dephasing of the discrete energy states, often seems to be inoperative. We suggest and develop a theory for an intrinsic mechanism for dephasing in QDs: second-order elastic interaction between quantum dot charge carriers and LO phonons. The calcula...

Artificial carrier heating due to the introduction of ab initio Coulomb scattering in Monte Carlo simulations

Accurately treating ionised impurity scattering in a way suitable to describe the influence of random dopant fluctuations on device characteristics is important in next generation MOSFETs. Statistical variations are unobservable using a continuous treatment of the doping, requiring a discrete representation of impurities. In particle-based simulations the P3M method, which resolves the Coulomb ...

Carrier Scattering in Metals and Semiconductors

apparent coincidence with the positron lines has deepened the mystery of the origin of these pairs. Despite such subsequent discoveries, this splendid review, with its full documentation, will remain useful to orient anyone who wants to study the fundamentals of heavy-ion-atom collision physics. The volume concludes with a pedagogic review of beam-foil spectroscopy by one of its practitioners, ...

Carrier-carrier scattering in the gain dynamics of InxGa1-xAs/AlyGa1-yAs diode lasers.