AI Article Synopsis
- The charge order state of the organic conductor α-(BEDT-TTF)(2)I(3) shows a power law behavior in its current-voltage characteristics at low temperatures.
- The observed power law is linked to the changes in the electric field's effect on the potential between thermally excited electrons and holes.
- A transition resembling Kosterlitz-Thouless behavior occurs between 30 to 45 K, where the number of unbound electron-hole pairs fluctuates based on temperature.
Article Abstract
The current-voltage characteristics in the charge order state of the two-dimensional organic conductor α-(BEDT-TTF)(2)I(3) exhibit power law behavior at low temperatures. The power law is understood in terms of the electric-field-dependent potential between electrons and holes, which are thermally excited from the charge order state. The power law exponent steeply changes from 1 to 3 in the range from 30 to 45 K with decreasing temperature, thereby suggesting the occurrence of a Kosterlitz-Thouless-type transition; many (few) unbound electron-hole pairs are thermally excited above (below) the transition. The effects of the finite size and interlayer coupling on the power law behavior are discussed.
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| http://dx.doi.org/10.1103/PhysRevLett.110.196602 | DOI Listing |
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