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Induced Hall-Like Current by Acoustic Phonons in Semiconductor Fluorinated Carbon Nanotube

DOI: 10.4236/wjcmp.2020.102005, PP. 71-87

Keywords: Carbon Nanotube, Fluorinated, Hall-Like Current, Cyclotron

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Abstract:

We show that Hall-like current can be induced by acoustic phonons in a nondegenerate, semiconductor fluorine-doped single-walled carbon nanotube (FSWCNT) using a tractable analytical approach in the hypersound regime \"\"?(q is the modulus of the acoustic wavevector and \"\" is the electron mean free path). We observed a strong dependence of the Hall-like current on the magnetic field, H, the acoustic wave frequency, \"\" , the temperature, T, the overlapping integral, \"\" , and the acoustic wavenumber, q. Qualitatively, the Hall-like current exists even if the relaxation time \"\" does not depend on the carrier energy but has a strong spatial dispersion, and gives different results compared to that obtained in bulk semiconductors. For \"\" and \"\" , the Hall-like current is \"\" in the absence of an electric field and in the presence of an electric field at 300 K. Similarly, the surface electric field \"\" due to the Hall-like current is \"\" in the absence of an external electric field. In the presence of an external electric field, \"\" and \"\" for \"\" at 300 K. q and \"\" can be used to tune the Hall-like current and \"\" of the FSWCNT. This offers the potential for room temperature application as an acoustic switch or transistor, as well as a material for ultrasound current source density imaging (UCSDI) and AE hydrophone device in biomedical engineering.

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