Drift velocity saturation and large current density in an intrinsic three-dimensional Dirac semimetal cadmium arsenide

Abstract

Transport of electrons at high electric fields is investigated in an intrinsic three-dimensional Dirac semimetal cadmium arsenide, considering the scattering of electrons from acoustic and optical phonons. Screening and hot phonon effect are taken in to account. Expressions for the hot electron mobility $\mu$ and power loss $P$ are obtained as a function of electron temperature $T_e$. The dependence of drift velocity $v_d$ on electric field $E$ and electron density $n_e$ has been studied. Hot phonon effect is found to set in the saturation of $v_d$ at relatively low $E$ and significantly degrades its magnitude. The drift velocity is found to saturate at a value $v_{ds}\sim 10^7$ cm/s and it is weakly dependent on $n_e$. A large saturation current density $\sim 10^6$ A/cm${}^2$ is predicted.

References in corpus (27)

• Weyl and Dirac Semimetals in Three Dimensional Solids
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Graphene field-effect-transistors with high on/off current ratio and large transport band gap at room temperature
• Experimental Realization of a Three-Dimensional Dirac Semimetal
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
• Negative Magnetoresistance in Dirac Semimetal Cd3As2
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Inelastic Scattering and Current Saturation in Graphene
• Large linear magnetoresistance in Dirac semi-metal Cd3As2 with Fermi surfaces close to the Dirac points
• Thermoelectric properties of Weyl and Dirac semimetals
• Energy Relaxation of Hot Dirac Fermions in Graphene
• Observation of the quantum Hall effect in confined films of the three-dimensional Dirac semimetal Cd3As2
• Landau level splitting in Cd3As2 under high magnetic fields
• Anisotropic Fermi Surface and Quantum Limit Transport in High Mobility 3D Dirac Semimetal Cd3As2
• 3D Dirac semimetal Cd3As2: A review of material properties
• Carrier screening, transport, and relaxation in 3D Dirac semimetals
• Mechanism for current saturation and energy dissipation in graphene transistors
• Hydrodynamic theory of transport in doped graphene
• Ultrafast Relaxation Dynamics of Photoexcited Dirac Fermion in The Three Dimensional Dirac Semimetal Cadmium Arsenide
• Two-Dimensional Dirac Fermions in Thin Films of Cd3As2
• Electronic Cooling in Weyl and Dirac Semimetals
• Enhanced Thermoelectric Properties of Dirac Semimetal Cd3As2
• Tuning the scattering mechanism in three-dimensional Dirac semimetal Cd${}_3$As${}_2$
• Hot electron cooling in Dirac semimetal Cd${}_3$As${}_2$ due to polar optical phonons

Cited by in corpus (1)

• Plasmon Fizeau drag in 3D Dirac and Weyl semimetals