Stability of Polarized States for Diamond Valleytronics
| Autor: | J. Hammersberg, Markus Gabrysch, Daniel J. Twitchen, Nattakarn Suntornwipat, Jan Isberg, Kiran Kumar Kovi, Saman Majdi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Coupling constant Condensed Matter - Materials Science Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Scattering Monte Carlo method Diamond Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Electron engineering.material Polarization (waves) Microsecond Valleytronics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) engineering |
| Popis: | The stability of valley polarized electron states is crucial for the development of valleytronics. A long relaxation time of the valley polarization is required to enable operations to be performed on the polarized states. Here we investigate the stability of valley polarized states in diamond, expressed as relaxation time. We have found that the stability of the states can be extremely long when we consider the symmetry determined electron-phonon scattering. By Time-of-Flight measurements and Monte Carlo simulations, we determine electron-phonon coupling constants and use these data in order to map out the relaxation time temperature dependency. The relaxation time can be microseconds or longer below 100K and 100 V/cm for diamond due to the strong covalent bond, which is highly encouraging for valleytronic applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|