Angular Dependent Magnetoresistance Oscillation of a Quasi-Two-Dimensional System in a Periodic Potential

Abstract

(BEDT-TTF)${}_2$MHg(SCN)${}_4$[M:K,Rb,Tl] shows typical two-dimensional angular dependent magnetoresistance oscillation (ADMRO) at high temperature (T$>$8K), but at lower temperature it shows anomalously large magnetoresistance, and the ADMRO pattern changes. These low temperature behaviors are explained as effects of a periodic potential. The present explanation is different from that by Kartsovnik et al. [J. Phys. I France {\bf 3} (1993) 1187] in that reconstruction of the cylindrical Fermi surface into an open Fermi surface is not assumed. It is also predicted that if the periodic potential exists at quantizing magnetic field, resistivity peak of new origin should be observed.

4 pages, revtex, no figures, submitted to J. Phys. Soc. Jpn

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• Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal
• Superconducting properties and Fermi-surface topology of the quasi-two-dimensional organic superconductor $\lambda$-(BETS)${}_2$GaCl${}_4$
• Interlayer Aharonov-Bohm interference in tilted magnetic fields in quasi-one-dimensional layered conductors
• Field-induced metal-insulator transition in a two-dimensional organic superconductor
• Magnetoresistance and magnetic breakdown in the quasi-two-dimensional conductors (BEDT-TTF)${}_2$MHg(SCN)${}_4$[M=K,Rb,Tl]
• Angular magnetoresistance oscillations in bilayers in tilted magnetic fields
• Magnetic quantum oscillations in the charge-density-wave state of the organic metals $\alpha$-(BEDT-TTF)${}_2$MHg(SCN)${}_4$ with M = K and Tl