تاثیر جفت شدگی اسپین مدار بر خواص الکترونی حلقه‌های کوانتومی دو بعدی

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم، دانشگاه یاسوج، یاسوج، ایران

چکیده

در این مقاله، یک حلقه‌ی کوانتومی را در نظر گرفته و سپس ترازهای انرژی آن تحت تأثیر میدان‌های‌ الکتریکی و مغناطیسی خارجی و در حضور برهم‌کنش اسپین مدار راشبا و درسل هاوس مورد بررسی قرار می‌گیرد. بدین منظور، ابتدا هامیلتونی سیستم را در حضور جفت شدگی اسپین مدار و در حضور میدان‌های الکتریکی و مغناطیسی خارجی نوشته و سپس با استفاده از روش قطری‌سازی، ویژه مقدارهای انرژی سیستم را محاسبه کرده و تاثیر میدان‌های خارجی و پهنای حلقه را بر ویژه مقادیر انرژی سیستم مطالعه می‌کنیم. نتایج به‌دست آمده نشان می‌دهد که برهم‌کنش اسپین مدار، میدان‌های خارجی و پهنای حلقه تاثیر قابل توجهی بر ترازهای انرژی سیستم دارند

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Spin-orbit interaction effects on the electronic structure of two-dimensional quantum rings

نویسندگان [English]

  • Ghasem Rezaei
  • Sahar Habibi Nasab,
Department of Physics, Faculty of Sciences, Yasouj University, Yasouj, Iran
چکیده [English]

In this paper, electronic structure of a two dimensional quantum ring under the influence of external electric and magnetic fields are studied in the presence of Rashba and Dresselhaus spin-orbit interactions. To do this, at first, the effective Hamiltonian of the system by considering the spin-orbit coupling is demonstrated in the presence of applied electric and magnetic fields and afterwards the Schrodinger equation is solved using the matrix diagonalization approach. Then, we investigate the effects of external fields and the size of the ring on the eigenvalues the system. Our results indicate that, spin-orbit interactions, external fields and the ring size have a great influence on the electronic structure of the system.

کلیدواژه‌ها [English]

  • Quantum rings
  • Spin-orbit interactions
  • external fields
  • diagonalization method
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