Abstract
In this study, we investigated the electric field effect on the transport properties of a Bi nanowire. These effects were modeled by a surface potential. The electron states of Bi nanowires were numerically analyzed by effective mass equations at the T-point and L-point taking into account surface potential due to an external electric field. The Seebeck coefficients of Bi nanowires were calculated by using the Boltzmann equation with a constant relaxation time. It was found that the Seebeck coefficients increased when the sign of the surface potential parameter was negative. In particular, when the surface potential parameter was \(-\)1 eV and the skin depth was 10 nm in a 20-nm-diameter nanowire, the maximum absolute value of the Seebeck coefficient was larger than 1 mV/K, which was greatly improved compared to that without an external electric field.
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Komine, T., Aono, T., Nabatame, Y. et al. Enhancement of Seebeck Coefficient in Bi Nanowires by Electric Field Effect. J. Electron. Mater. 45, 1555–1560 (2016). https://doi.org/10.1007/s11664-015-4113-x
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DOI: https://doi.org/10.1007/s11664-015-4113-x