TY - JOUR
T1 - Quantum oscillations in a topological insulator Bi 2Te 2Se with large bulk resistivity (6 Ω cm)
AU - Xiong, Jun
AU - Petersen, A. C.
AU - Qu, Dongxia
AU - Hor, Y. S.
AU - Cava, R. J.
AU - Ong, N. P.
N1 - Funding Information:
We acknowledge support from the National Science Foundation under Grant DMR 0819860 and from the Nano Electronics Research Corporation (Award 2010-NE-2010G). We thank Liang Fu, Duncan Haldane and Andrei Bernevig for explaining the filling of LLs in the 2D Dirac system.
PY - 2012/2
Y1 - 2012/2
N2 - We report the observation of prominent Shubnikovde Haas oscillations in a Topological Insulator, Bi 2Te 2Se, with large bulk resistivity (6Ωcm at 4 K). By fitting the SdH oscillations, we infer a large metallicity parameter kFℓ=41, with a surface mobility ( μs∼2800 cm2/Vs) much larger than the bulk mobility ( μb∼50 cm2/Vs). The plot of the index fields Bν vs. filling factor ν shows a 12-shift, consistent with massless, Dirac states.
AB - We report the observation of prominent Shubnikovde Haas oscillations in a Topological Insulator, Bi 2Te 2Se, with large bulk resistivity (6Ωcm at 4 K). By fitting the SdH oscillations, we infer a large metallicity parameter kFℓ=41, with a surface mobility ( μs∼2800 cm2/Vs) much larger than the bulk mobility ( μb∼50 cm2/Vs). The plot of the index fields Bν vs. filling factor ν shows a 12-shift, consistent with massless, Dirac states.
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U2 - 10.1016/j.physe.2011.09.011
DO - 10.1016/j.physe.2011.09.011
M3 - Article
AN - SCOPUS:84859215628
SN - 1386-9477
VL - 44
SP - 917
EP - 920
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 5
ER -