High-temperature stability of electron transport in semiconductors with strong spin-orbital interaction
| Autor: | G. Tomaka, J. Grendysa, P. Śliż, C. R. Becker, J. Polit, R. Wojnarowska, A. Stadler, E. M. Sheregii |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Magnetoresistance Condensed matter physics business.industry Conductance 02 engineering and technology Conductivity Quantum Hall effect 021001 nanoscience & nanotechnology 01 natural sciences Amplitude Semiconductor 0103 physical sciences 010306 general physics 0210 nano-technology business Spin-½ Surface states |
| Zdroj: | Physical Review B. 93 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.93.205419 |
| Popis: | Experimental results of the magnetotransport measurements (longitudinal magnetoresistance ${R}_{xx}$ and the Hall resistance ${R}_{xy}$) are presented over a wide interval of temperatures for several samples of ${\mathrm{Hg}}_{1\ensuremath{-}x}{\mathrm{Cd}}_{x}\mathrm{Te}$ ($x\ensuremath{\approx}0.13--0.15$) grown by MBE---thin layers (thickness about 100 nm) strained and not strained and thick ones with thickness about $1\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{m}$. An amazing temperature stability of the SdH-oscillation period and amplitude is observed in the entire temperature interval of measurements up to 50 K. Moreover, the quantum Hall effect (QHE) behavior of the Hall resistance is registered in the same temperature interval. These peculiarities of the ${R}_{xx}$ and ${R}_{xy}$ for strained thin layers are interpreted using quantum Hall conductivity (QHC) on topologically protected surface states (TPSS) [C. Br\"une et al., Phys. Rev. Lett. 106, 126803 (2011)]. In the case of not strained layers it is assumed that the QHC on the TPSS (or on the resonant interface states) contributes also to the conductance of the bulk samples. |
| Databáze: | OpenAIRE |
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