Abstract：
:The temperature dependence of the resistivity (ρ) of Ag-doped Bi2Se3 (AgxBi2-xSe3) shows insulating behavior above 35 K, but below 35 K, ρ suddenly decreases with decreasing temperature, in contrast to the metallic behavior for non-doped Bi2Se3 at 1.5-300 K. This significant change in transport properties from metallic behavior clearly shows that the Ag doping of Bi2Se3 can effectively tune the Fermi level downward. The Hall effect measurement shows that carrier is still electron in AgxBi2-xSe3 and the electron density changes with temperature to reasonably explain the transport properties. Furthermore, the positive gating of AgxBi2-xSe3 provides metallic behavior that is similar to that of non-doped Bi2Se3, indicating a successful upward tuning of the Fermi level.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Uesugi E,Uchiyama T,Goto H,Ota H,Ueno T,Fujiwara H,Terashima K,Yokoya T,Matsui F,Akimitsu J,Kobayashi K,Kubozono Ydoi
10.1038/s41598-019-41906-7subject
Has Abstractpub_date
2019-03-29 00:00:00pages
5376issue
1issn
2045-2322pii
10.1038/s41598-019-41906-7journal_volume
9pub_type
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