Size Effects in Quantum Single Crystal Bismuth Wires in Glass Cover

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Abstract:

The present paper describes the results of researches in the size effects (classical and quantum ones) in single-crystal bismuth nanowires of strictly cylindrical form in a glass isolation, obtained by liquid phase casting with a minimum diameter of 45 nm. The results of the complex study of temperature and thickness dependences of the resistance, thermopower, longitudinal (LMR) and transverse (TMR) magnetoresistance in magnetic fields up to 14 T, in the temperature range 1.5–300 K and under the influence of anisotropic elastic deformation are discussed. A number of new effects in Bi nanowires observed for the first time, such as semiconductor type of conductivity, thermopower sign inversion, and formation of a maximum in the positive range, depending on the wire diameter d; disappearance of ShdH oscillations at d < 80 nm; presence of negative magnetoresistance in the perpendicular magnetic field (H⊥I) are interpreted in terms of manifestation of the quantum size effect with regard for theoretical justification.

Keywords: ELASTIC DEFORMATION; FERMI SURFACE; NANOWIRES; QUANTUM SIZE EFFECT; SURFACE STATE; THERMOPOWER

Document Type: Review Article

DOI: http://dx.doi.org/10.1166/jno.2009.1004

Publication date: April 1, 2009

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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