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SM ISO690:2012 AVERKIEV, Nikita, BEREZOVEŢ, Veaceslav, SAVCHENKO, Grigorii, NIKOLAEVA, Albina. Galvanomagnetic effects in tellurium whiskers. In: Physica Status Solidi (B) Basic Research, 2016, vol. 253, pp. 255-259. ISSN 0370-1972. DOI: https://doi.org/10.1002/pssb.201552373 |
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Physica Status Solidi (B) Basic Research | |
Volumul 253 / 2016 / ISSN 0370-1972 | |
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DOI:https://doi.org/10.1002/pssb.201552373 | |
Pag. 255-259 | |
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Galvanomagnetic effects on Te samples were studied. The measurements were made in the broad range of temperatures (1.5K≤T≤80K) and the values of the magnetic field induction. Shubnikov-de-Haas oscillations (SH) were detected in strong magnetic fields (ωcτ ≫ 1, where ωc is the cyclotrone frequency); as well as anomalous temperature dependence of the Hall potential in classically weak (ωcτ ≪ 1) magnetic fields. It was found out that the revealed SH oscillations are due to the Landau quantizations of the energy spectrum of three-dimensional (3D) charge carriers (holes) in the bulk samples under study. In the area of weak magnetic fields (ωcτ ≪ 1), the effect of anomalous magnetoresistance was found, which was due to the weak localization of 3D holes in the samples . The theory of the Hall effect for holes in weak magnetic fields (B < 0.2T) was developed. It is based on the solution of kinetic Boltzmann equation with the specific type of the collision integral; taking into account the carriers energy spectrum in tellurium. It was shown that the peculiarities of the Hall effect temperature dependence; which were found experimentally in weak magnetic fields; can be qualitatively explained if we bear in mind the complex structure of tellurium valence band. |
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Cuvinte-cheie Hall effect, Shubnikov-de-Haas oscillations, Tellurium, Whiskers |
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