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ترابرد الکتریکی در یک سیم کوانتومی "Ga1-xAlxAs" در حضور برهمکنش الکترون- فونون | ||
فصلنامه علمی اپتوالکترونیک | ||
مقاله 1، دوره 6، شماره 1 - شماره پیاپی 14، آذر 1402، صفحه 1-12 اصل مقاله (1.36 M) | ||
نوع مقاله: پژوهشی | ||
شناسه دیجیتال (DOI): 10.30473/jphys.2023.68907.1161 | ||
نویسندگان | ||
اکبر خلج* 1؛ علی اصغر شکری2؛ نادیا سلامی3 | ||
1گروه فیزیک دانشگاه پیام نور مرکز تهران شرق | ||
2استاد، گروه فیزیک نظری و نانو، دانشگاه الزهرا، تهران، ایران | ||
3گروه فیزیک، واحد یاسوج، دانشگاه آزاد اسلامی، یاسوج، ایران | ||
چکیده | ||
در این مقاله، با استفاده از رهیافت تابع گرین خواص ترابرد الکتریکی یک ساختار متجانس شبه یک بعدی مبتنی بر (مانند سیم کوانتومی) در حضور برهمکنش الکترون- فونون به طور نظری مطالعه میشود. برای این منظور، ساختار مورد نظر با طول محدود را بین دو الکترود نیمبینهایت فلزی در نظر میگیریم. با استفاده از هامیلتونی این ساختار در چارچوب تقریب بستگی قوی، ضریب عبوردهی الکترون را در رهیافت تابع گرین در غلظتهای مختلف Al و طولهای متفاوت سیم کوانتمی ناحیه میانی به دست میآوریم. برای مطالعه اثر الکترون- فونون، یک نیروی واداشته تابع مکان و زمان را به هر اتم در یک زنجیرهی خطی در تقریب هماهنگ در نظر میگیریم. جابجایی هر اتم در انرژی پرش آن با همسایهها موثر است. نتایج محاسباتی این مقاله میتواند به درک ما از برهمکنش الکترون- فونون و تاثیر آن در خواص ترابرد الکتریکی کمک کند. | ||
کلیدواژهها | ||
برهمکنش الکترون – فونون؛ سیم کوانتومی؛ ضریب عبوردهی الکترونی؛ مدل تابع گرین؛ تقریب هماهنگ | ||
عنوان مقاله [English] | ||
Electrical transport in a Ga1-xAlxAs quantum wire in the presence of electron-phonon interaction | ||
نویسندگان [English] | ||
Akbar Khalaj1؛ Aliasghar shokri2؛ Nadia Salami3 | ||
1Department of physic, in Tehran shargh Payamnoor University | ||
2Professor, Department of Theoretical and Nano Physics, Alzahra University, Tehran, Iran. | ||
3Department of Physics, Yasuj Branch, Islamic Azad University, Yasuj, Iran | ||
چکیده [English] | ||
In this paper, the electrical transport properties of a quasi-one dimensional heterostructure based on the GaAs (such as quantum wire) are studied in the presence of the electron-phonon interaction, theoretically. In this regards, a homogeneous quasi-one dimensional quantum wire with a given length is considered which is coupled between two semi-infinite metal leads. Using the Hamiltonian of the system the framework of the tight binding method within the effective mass approximation, the electron transmission coefficient are studied as a function of the electron energy and also the applied filed frequency. Different values of the length as well as Al concentrations of the central region are considered. In order to investigate the electron-phonon effects, we consider a time and space dependent external field which is applied on each atoms in a linear chain within the harmonic approximation. The numerical results of this paper can have shed light on the electron-phonon impacts on the electron transport of the nanowire. | ||
کلیدواژهها [English] | ||
Electron-phonon interaction, Quantum wire, Transmission coefficient, Green’s function, Harmonic approximation | ||
مراجع | ||
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