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A Mechanism of DC-AC Conversion in the Organic Thyristor
Department of Applied Physics, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa 277-8581, Japan
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
* Author to whom correspondence should be addressed.
Received: 5 February 2010; in revised form: 18 February 2010 / Accepted: 16 March 2010 / Published: 19 March 2010
Abstract: The charge ordered organic salt θ-(BEDT-TTF)2CsZn(SCN)4 exhibits a giant nonlinear conduction at low temperatures. The voltage-current characteristics of this compound are similar to those of a thyristor device, after which we named it the organic thyristor. This material shows current oscillation in the presense of dc voltage, which arises from a mechanism different from conventional oscillating circuits, because the oscillation appears in a sample that does not show negative derivative resistance. We have performed a standard circuit analysis, and show that the voltage-current curve is “blurred” in the high current region, and the oscillation occurs in the blurred region. This type of oscillation has never been reported, and a possible origin for this is suggested.
Keywords: organic conductor; charge order; nonlinear conduction; current oscillation
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Suko, T.; Terasaki, I.; Mori, H.; Mori, T. A Mechanism of DC-AC Conversion in the Organic Thyristor. Materials 2010, 3, 2027-2036.
Suko T, Terasaki I, Mori H, Mori T. A Mechanism of DC-AC Conversion in the Organic Thyristor. Materials. 2010; 3(3):2027-2036.
Suko, Tomohiro; Terasaki, Ichiro; Mori, Hatsumi; Mori, Takehiko. 2010. "A Mechanism of DC-AC Conversion in the Organic Thyristor." Materials 3, no. 3: 2027-2036.