تأثیر میدان های الکتریکی ومغناطیسی بر ویژگی های الکترونی نانونوارهای استانینی

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

1 عضو هیئت علمی گروه فیزیک دانشگاه زنجان

2 دانشگاه زنجان

چکیده

استانین، یک نانوساختار دو بعدی از اتم های Sn، دارای ساختار لانه زنبوری می باشد. بر هم کنش اسپین-مدار ذاتی قوی استانین، موجب ایجاد شکاف انرژی تا حدود 0.07 الکترون ولت در ساختار نواری آن می شود. در این پژوهش، ویژگی های الکترونی نانونوارهای استانینی لبه زیگزاگ با مدل تنگ بست و روش تابع گرین در حضور میدان های الکتریکی و مغناطیسی را بررسی می نماییم. در حضور میدان الکتریکی عمودی، در نانونوارهای استانینی زیگزاگ گذار فازهای فلز-نیم فلز و نیم فلز-نیم رسانا مشاهده می نماییم. در حضور میدان الکتریکی عرضی و یا مغناطیسی جداشدگی اسپینی خواهیم داشت. نتایج ما نشان می دهد که با تنظیم بزرگی و جهت میدان الکتریکی و مغناطیسی می توان ویژگی های الکتریکی، اسپینی و نوری سامانه را کنترل نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of electric and magnetic fields on electronic properties of stanene nanoribbons

نویسندگان [English]

  • Farhad Khoeini 1
  • Leila Esmaeili 2
2 University of Zanjan
چکیده [English]

Stanene, a two-dimensional nanostructure of Sn atoms, has a honeycomb structure. The strong intrinsic spin-orbit interaction of stanene causes an energy gap 0.07 eV in its band structure. In this research, the electronic properties of the stanene nanoribbons with the zigzag edges are investigated by the tight binding model and the Green’s function method and in the presence of electric and magnetic fields. In the presence of a vertical electric field, we observe metal-semimetal and semimetal-semiconductor phase transitions in the system. In the presence of a transverse electric field and or magnetic field, we will have spin band splitting. Our results show that by tuning the magnitude and direction of the electric and magnetic fields, we can control the electrical, spin and optical properties of the system.

کلیدواژه‌ها [English]

  • Stanene
  • Tight binding model
  • Electronic properties
  • Band structure
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