Kavli Affiliate: Yi Zhou
| First 5 Authors: Tian Le, Ruiyang Jiang, Linfeng Tu, Renji Bian, Yiwen Ma
| Summary:
Quantum magneto-oscillations have long been a vital subject in condensed
matter physics, with ubiquitous quantum phenomena and diverse underlying
physical mechanisms. Here, we demonstrate the intrinsic and reproducible
DC-current-driven quantum electro-oscillations with a periodicity in the
inverse of the current (1/I), in quasi-one-dimensional charge-density-wave
(CDW) insulators (TaSe$_4$)$_2$I and TaS$_3$ nanowires. Such oscillations
manifest in the nearly infinite Fr"ohlich conductivity region where the
undamped CDW flow forms in a finite electric current, and finally disappear
after the oscillation index n reaches 1. A systematic investigation on the
effect of temperature and magnetic field establishes that the observed
electro-oscillations are a coherent quantum phenomenon. We discuss the
possibilities of the physical mechanisms, including the formation of
sliding-driven inherent Floquet sidebands. Our results introduce a new member
in the family of quantum oscillations, and shed light on plausible avenues to
explore novel physics and potential applications of coherent density-wave
condensates.
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