Band splitting in Cd3As2 measured by magnetotransport

Desrat Wilfried; Krishtopenko Sergey S.; Piot Benjamin A.; Orlita Milan; Conséjo Christophe; Ruffenach Sandra; Knap Wojciech; Nateprov Alexander; Arushanov Ernest; Teppe Fréd́eric

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DESRAT, Wilfried, KRISHTOPENKO, Sergey S., PIOT, Benjamin A., ORLITA, Milan, CONSÉJO, Christophe, RUFFENACH, Sandra, KNAP, Wojciech , NATEPROV, Alexander, ARUSHANOV, Ernest, TEPPE, Fréd́eric. Band splitting in Cd3As2 measured by magnetotransport. In: Physical Review B, 2018, vol. 97, p. 0. ISSN 2469-9950. DOI: https://doi.org/10.1103/PhysRevB.97.245203

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Physical Review B

Volumul 97 / 2018 / ISSN 2469-9950 /ISSNe 2469-9969

Band splitting in Cd3As2 measured by magnetotransport

DOI:https://doi.org/10.1103/PhysRevB.97.245203

Pag. 0-0

Desrat Wilfried¹, Krishtopenko Sergey S.¹², Piot Benjamin A.³, Orlita Milan³, Conséjo Christophe¹, Ruffenach Sandra¹, Knap Wojciech , Nateprov Alexander⁴, Arushanov Ernest⁴, Teppe Fréd́eric¹

¹ University of Montpellier,
² Institute for Physics of Microstructures RAS,
³ LNCMI, CNRS-UGA-UPS-INSA-EMFL, Grenoble,
⁴ Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 9 august 2018

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Magnetotransport measurements have been performed on (112)-oriented bulk Cd3As2 samples with in situ rotation at low temperature. The frequency analysis of the Shubnikov-de Haas oscillations reveals two weakly separated frequencies arising from two Fermi ellipsoids. The angle dependence of these frequencies is fitted by an analytical expression that we derived for any magnetic field orientation. It is based on an 8×8 k·p model which includes the spin-orbit coupling, the crystal field splitting due to tetragonal distortion, and the additional band splitting occurring in noncentrosymmetric crystals. This band splitting is evaluated to a finite value of 30 meV, demonstrating the absence of inversion symmetry in our Cd3As2 crystal.

Cuvinte-cheie
Arsenic compounds, Crystal symmetry, temperature

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