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Dien Tang Thi,Ba Cao Thi Vi,Bau Nguyen Quang,Anh Nguyen Thi Nguyet 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.12
The infuence of confned optical phonons (confned OP) and electromagnetic waves on the Peltier efects in rectangular quantum wires (RQW) in a parallel magnetic feld is investigated. Theoretical results for the parallel Peltier coefcient (PC) are determined using the quantum kinetic equation method. It is defned as a function of the external magnetic feld, amplitude, and frequency of the electromagnetic wave, temperature, and size of the RQW, especially quantum numbers m1, and m2 characterizing the confned OP. The theoretical results are numerically appraised and graphed for the GaAs RQW model. It shows that confned OP not only increases the parallel PC but also expands the resonance position compared to the unconfned OP case. Besides, the parallel PC increases signifcantly as the temperature rises and the confned OP is the main cause of the increase in the parallel PC at low temperatures. In addition, the resonance peaks of the parallel PC are shifted to the region of the larger magnetic feld. When the width of the RQW is less than 20 nm, the parallel PC increases signifcantly. When the width of the RQW rises to infnity, the results of bulk semiconductors could be obtained.