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Title: Stability of polarized states for diamond valleytronics

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 electron-phonon scattering processes allowed by symmetry considerations. We determine electron-phonon coupling constants by Time-of-Flight measurements and Monte Carlo simulations and use these data to map out the relaxation time temperature dependency. The relaxation time for diamond can be microseconds or longer below 100 K and 100 V/cm due to the strong covalent bond, which is highly encouraging for future use in valleytronic applications.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Division for Electricity, Uppsala University, Box 534, S-751 21 Uppsala (Sweden)
  2. Element Six Technologies, 3901 Burton Drive, Santa Clara, CA 95054 (United States)
Publication Date:
OSTI Identifier:
22300028
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPUTERIZED SIMULATION; COVALENCE; DIAMONDS; ELECTRON-PHONON COUPLING; ELECTRONS; MONTE CARLO METHOD; PHONONS; POLARIZATION; POLARIZED PRODUCTS; RELAXATION TIME; SCATTERING; STABILITY; SYMMETRY; TIME-OF-FLIGHT METHOD