The role of vector potential coupling in the hot electron cooling power in bilayer graphene at low temperature

A theory of hot electron cooling power due to polar optical phonons P is developed in 3D Dirac semimetal (3DDS) CdAs taking account of hot phonon effect. Hot phonon distribution N and P are investigated as a function of electron temperature T , electron density n, and phonon relaxation time [Formula: see text]. It is found that P increases rapidly (slowly) with T at lower (higher) temperature regime. Whereas, P is weakly decreasing with increasing n. The results are compared with those for three-dimensional electron gas (3DEG) in CdAs semiconductor. Hot phonon effect is found to reduce P considerably and it is stronger in 3DDS CdAs than in CdAs semiconductor. P is also compared with the hot electron cooling power due to acoustic phonons P. We find that a crossover takes place from P dominated cooling at low T to P dominated cooling at higher T. The temperature at which this crossover occurs shifts towards higher values with the increase of n . Also, hot electron energy relaxation time [Formula: see text] is discussed. It is suggested that [Formula: see text] can be tuned to achieve faster or slower energy loss for suitable applications of CdAs.

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Oscillations of the electron energy loss rate in two-dimensional transition-metal dichalcogenides in the presence of a quantizing magnetic field

Bich

Kubakaddi

Đình

et al. 2021

Phys. Rev. B

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The role of vector potential coupling in the hot electron cooling power in bilayer graphene at low temperature

Cited by 4 publications

References 34 publications

Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave

Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave

Hot electron cooling in Dirac semimetal Cd₃As₂ due to polar optical phonons

Oscillations of the electron energy loss rate in two-dimensional transition-metal dichalcogenides in the presence of a quantizing magnetic field

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The role of vector potential coupling in the hot electron cooling power in bilayer graphene at low temperature

Cited by 4 publications

References 34 publications

Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave

Theoretical investigation of hot electron cooling process in GaAs/AlAs cylindrical quantum wire under the influence of an intense electromagnetic wave

Hot electron cooling in Dirac semimetal Cd3As2 due to polar optical phonons

Oscillations of the electron energy loss rate in two-dimensional transition-metal dichalcogenides in the presence of a quantizing magnetic field

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Hot electron cooling in Dirac semimetal Cd₃As₂ due to polar optical phonons