Abstract

We report novel angle-dependent magnetotransport phenomena in quasi-two-dimensional layered conductors under interlayer electric fields. Interlayer conduction shows the Stark cyclotron resonance when the orbital motion of an electron becomes periodic in k -space, and the amplitude of the reasonance oscillates depending on magnetic field orientations. A conventional angle-dependent magnetoresistance oscillation switches to this oscillation at high electric fields. Using the organic conductor α-(BEDT-TTF) 2 NH 4 Hg(SCN) 4 , we have successfully observed an angle-dependent Stark cyclotron resonance for the first time.

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