HOT-PHONON LIMITED ELECTRON ENERGY RELAXATION IN AlN/GaN

2002 ◽  
Vol 12 (02) ◽  
pp. 459-468 ◽  
Author(s):  
A. MATULIONIS ◽  
J. LIBERIS ◽  
L. ARDARAVIČIUS ◽  
J. SMART ◽  
D. PAVLIDIS ◽  
...  

Microwave noise technique is applied to study energy dissipation in an AlN/GaN heterostructure containing a two-dimensional electron gas channel. Measurements of the dissipated power and the noise temperature are performed at 80 K lattice temperature in the electric field range up to 40 kV/cm. The energy relaxation time is found to decrease from 40 ps to 0.55 ps when the bias is increased. The experimental data are discussed in the electron temperature approximation assuming electron energy dissipation on optical phonons and hot-phonon effects. Dependencies of the hot-phonon number and the hot-phonon temperature on the hot-electron temperature are deduced. The frequency cutoff imposed by the limited energy dissipation through optical phonons is estimated.

2020 ◽  
Vol 34 (32) ◽  
pp. 2050322
Author(s):  
A. L. Vartanian ◽  
A. L. Asatryan ◽  
A. G. Stepanyan ◽  
K. A. Vardanyan ◽  
A. A. Kirakosyan

The energy relaxation of hot electrons is proposed based on the spin–orbit (SO) interaction of both Rashba and Dresselhaus types with the effect of hot phonons. A continuum theory of optical phonons in nanowires taking into account the influence of confinement is used to study the hot-electron energy relaxation. The energy relaxation due to both confined (CO) and interface (IO) optical phonon emission on nanowire radius, electrical field strength, parameters of SO couplings and electron temperature is calculated. For considered values of the nanowire radius as well as other system parameters, scattering by IO phonons prevails over scattering by CO phonons. The presence of an electric field leads to the decrease of power loss in transitions between states with the same spin quantum numbers. With the increase of the electric field strength, the influence of the Dresselhaus SO interaction on the energy relaxation rate decreases. The effect of SO interaction does not change the previously obtained increasing dependence of power loss on electron temperature. The sensitivity of energy relaxation to the electric field also through the Rashba parameter allows controlling the rate of energy by electric field.


1989 ◽  
Vol 4 (10) ◽  
pp. 852-857 ◽  
Author(s):  
N Balkan ◽  
B K Ridley ◽  
M Emeny ◽  
I Goodridge

2008 ◽  
Vol 23 (7) ◽  
pp. 075048 ◽  
Author(s):  
A Matulionis ◽  
J Liberis ◽  
E Šermukšnis ◽  
J Xie ◽  
J H Leach ◽  
...  

1999 ◽  
Vol 176 (1) ◽  
pp. 369-372 ◽  
Author(s):  
N. M. Stanton ◽  
P. Hawker ◽  
A. J. Kent ◽  
T. S. Cheng ◽  
C. T. Foxon

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