Stability of Polarized States for Diamond Valleytronics

Abstract

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.

References in corpus (9)

• Control of valley polarization in monolayer MoS2 by optical helicity
• Valley polarization in MoS2 monolayers by optical pumping
• MoS_2 as an ideal material for valleytronics: valley-selective circular dichroism and valley Hall effect
• Valley contrasting physics in graphene: magnetic moment and topological transport
• Valley filter and valley valve in graphene
• Valley susceptibility of an interacting two-dimensional electron system
• Valley splitting of AlAs two-dimensional electrons in a perpendicular magnetic field
• Valley Polarization in Si(100) at Zero Magnetic Field
• Graphene quantum dots for valley-based quantum computing: A feasibility study

Cited by in corpus (4)

• A valleytronic diamond transistor: electrostatic control of valley-currents and charge state manipulation of NV centers
• Semiconductor Bloch equation analysis of optical Stark and Bloch-Siegert shifts in monolayers WSe${}_2$ and MoS${}_2$
• Ultrafast room-temperature valley manipulation in silicon and diamond
• Observation of transferred-electron oscillations in diamond