Effect of Pressure on the Interlayer Charge Transport and the Electronic Structure of the Metallic Layers in the Organic Two-Dimensional Bilayer Metal (BETS)4CoBr4(DCB)

Autor: Vladimir N. Zverev, A. M. Flakina, S. I. Pesotskii, Elena I. Zhilyaeva, Rimma N. Lyubovskaya, Rustem B. Lyubovskii
Rok vydání: 2021
Předmět:
Zdroj: Journal of Experimental and Theoretical Physics. 133:104-108
ISSN: 1090-6509
1063-7761
Popis: The resistance and magnetoresistance of the organic (BETS)4CoBr4(DCB) metal are studied at atmospheric pressure and a hydrostatic pressure of up to 10 kbar. The interlayer resistance at atmospheric pressure increases with decreasing temperature to T ≈ 25 K and then decreases as the temperature decreases further. The behavior of magnetoresistance exhibits incoherent transfer over the entire temperature range. The low-temperature metal-like behavior is related to transfer through resonance impurities. Pressure weakens the nonmetallic increase in the resistance and the transfer remains incoherent. The Fourier spectrum of the Shubnikov–de Haas oscillations at atmospheric pressure contains two fundamental frequencies, namely, Fα ≈ 860 T and Fβ ≈ 4400 T, with cyclotron masses mα ≈ 1.0me and mβ ≈ 1.9me. The applied pressure increases the fundamental frequencies by a few percent, which is most likely to be associated with the pressure-induced decrease in the unit cell size. The cyclotron mass under pressure remains almost the same.
Databáze: OpenAIRE
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