کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5422099 | 1507903 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles study of atomic structures and electronic properties of ultrathin Bi films on Ge(111)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: First-principles study of atomic structures and electronic properties of ultrathin Bi films on Ge(111) First-principles study of atomic structures and electronic properties of ultrathin Bi films on Ge(111)](/preview/png/5422099.png)
چکیده انگلیسی
The atomic and electronic structures of ultrathin bismuth films on Ge(111) surface were investigated using first-principles calculations at Bi coverages ranging from 1/3Â ML to 5Â ML. Morphology of the surfaces varied as the coverage of Bi was increased. The first layer of bismuth atoms followed the well-known trimer model, exhibiting large Rashba spin-splittings. At 2Â ML, bismuth atoms of the second monolayer form the second stacking layer of trimers, whereas at 3Â ML and 5Â ML, bismuth atoms of the two topmost monolayers form a buckled honeycomb structure. While the electronic structures of the two topmost layers exhibit two-dimensional nontrivial topological insulating phase, the bismuth atoms lying under these layers play an important role in p-type doping of the system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 626, August 2014, Pages 68-75
Journal: Surface Science - Volume 626, August 2014, Pages 68-75
نویسندگان
Chia-Hsiu Hsu, Hua-Rong Chang, Feng-Chuan Chuang, Yu-Tzu Liu, Zhi-Quan Huang, Hsin Lin, Vidvuds Ozolinš, Arun Bansil,