کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1516853 | 1511573 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Superconductivity and non-metallicity induced by doping the topological insulators Bi2Se3 and Bi2Te3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Superconductivity and non-metallicity induced by doping the topological insulators Bi2Se3 and Bi2Te3 Superconductivity and non-metallicity induced by doping the topological insulators Bi2Se3 and Bi2Te3](/preview/png/1516853.png)
چکیده انگلیسی
We show that by Ca doping the Bi2Se3 topological insulator, the Fermi level can be fine tuned to fall inside the band gap and therefore suppresses the bulk conductivity. Non-metallic Bi2Se3 crystals are obtained. On the other hand, the Bi2Se3 topological insulator can also be induced to become a bulk superconductor, with Tc∼3.8 K, by copper intercalation in the van der Waals gaps between the Bi2Se3 layers. Likewise, an as-grown crystal of metallic Bi2Te3 can be turned into a non-metallic crystal by slight variation in the Te content. The Bi2Te3 topological insulator shows small amounts of superconductivity with Tc∼5.5 K when reacted with Pd to form materials of the type PdzBi2Te3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 72, Issue 5, May 2011, Pages 572–576
Journal: Journal of Physics and Chemistry of Solids - Volume 72, Issue 5, May 2011, Pages 572–576
نویسندگان
Y.S. Hor, J.G. Checkelsky, D. Qu, N.P. Ong, R.J. Cava,