Galvanomagnetic effects in tellurium whiskers
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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

Galvanomagnetic effects in tellurium whiskers

DOI:https://doi.org/10.1002/pssb.201552373

Pag. 255-259

Averkiev Nikita1, Berezoveţ Veaceslav12, Savchenko Grigorii13, Nikolaeva Albina24
 
1 Ioffe Physical-Technical Institute, RAS,
2 International Laboratory of High Magnetic Fields and Low Temperatures,
3 Saint-Petersburg Electrotechnical University LETI,
4 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova
 
 
Disponibil în IBN: 20 iunie 2022


Rezumat

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. 

Cuvinte-cheie
Hall effect, Shubnikov-de-Haas oscillations, Tellurium, Whiskers