Preprint Article Version 1 This version not peer reviewed

Light-Induced Current Oscillations in the Charge-Ordered State of (TMTTF)2SbF6

Version 1 : Received: 31 July 2017 / Approved: 3 August 2017 / Online: 3 August 2017 (10:10:21 CEST)

A peer-reviewed article of this Preprint also exists.

Peterseim, T.; Dressel, M. Light-Induced Current Oscillations in the Charge-Ordered State of (TMTTF)2SbF6. Crystals 2017, 7, 278. Peterseim, T.; Dressel, M. Light-Induced Current Oscillations in the Charge-Ordered State of (TMTTF)2SbF6. Crystals 2017, 7, 278.

Journal reference: Crystals 2017, 7, 278
DOI: 10.3390/cryst7090278

Abstract

Below T_CO=157 K the quasi-one-dimensional charge-transfer salt (TMTTF)_2SbF_6 undergoes a pronounced phase transition to a charge-ordered ground state. We have explored the non-linear and photoconductive behavior as a function of applied voltage, laser pulse energy and temperature. Besides a decay of the photoconductive signal in a double exponential fashion in the millisecond range, we discover current oscillations in the kHz range induced by the application of short laser pulses. While the resonance frequencies do not depend on voltage or laser intensity and vary only slightly with temperature, the amplitude changes linearly with the laser intensity and voltage. The findings are discussed and compared to comparable phenomena in other low-dimensional electron systems.

Subject Areas

charge-transfer salts; TMTTF; charge-order phase transition; non-linear transport; photoconductivity; current oscillations; calculations of band structure and optical conductivity

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