No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
Two-band model interpretation of the p
- to n
-transition in ternary tetradymite topological insulators
1.D. Hsieh, Y. Xia, D. Qian, L. Wray, F. Meier, J. H. Di, J. Osterwalder, L. Patthey, A. V. Fedorov, H. Lin, A. Bansil, D. Grauer, Y. S. Hor, R. J. Cava, and M. Z. Hasan, Phys. Rev. Lett. 103, 146401 (2009).
3.Y. Xia, D. Qian, D. Hsieh, L. Wray, A. Pal, H. Lin, A. Bansil, D. Grauer, Y. S. Hor, R. J. Cava, and M. Z. Hasan, Nat. Phys. 5, 398 (2009).
21.B. M. Askerov, Electron Transport Phenomena in Semiconductors (World Scientific, Singapore, 1994).
24.G. N. Gordiakova, G. V. Kokosh, and S. S. Sinani, Sov. Phys.-Tech. Phys. 3, 1 (1958).
26.A. Kulbachinskii, M. Inoue, M. Sasaki, H. Negishi, W. X. Gao, K. Takase, Y. Giman, P. Lostak, and J. Horak, Phys. Rev. B 50, 16921 (1995).
36.D. Wolf, Spin Temperature and Nuclear-Spin Relaxation in Matter (Oxford, Clarendon, 1979).
Article metrics loading...
The requirement for large bulk resistivity in topological insulators has led to the design of complex ternary and quaternary phases with balanced donor and acceptor levels. A common feature of the optimized phases is that they lie close to the p- to n-transition. The tetradymite Bi2Te3−x
system exhibits minimum bulk conductance at the ordered composition Bi2Te2Se. By combining local and integral measurements of the density of states, we find that the point of minimum electrical conductivity at x = 1.0 where carriers change from hole-like to electron-like is characterized by conductivity of the mixed type. Our experimental findings, which are interpreted within the framework of a two-band model for the different carrier types, indicate that the mixed state originates from different types of native defects that strongly compensate at the crossover point.
Full text loading...
Most read this month