Charge density wave depinning and switching in NbSe3

Defects, Order, and Hysteresis in Driven Charge-Density Waves

“…This bistable behavior in the strong pinning regime will manifest itself in the currentvoltage characteristics of the sample. This is known as "switching" and is a generic feature of low-temperature CDWs [2,[28][29][30]. This behavior, which follows naturally from our approach, is in qualitative agreement with recent transport measurements of Lemay et al [2].…”

Charge Density Wave Phase Transitions in Large-Scale Few-Layer 1T-VTe2 Grown by Molecular Beam Epitaxy

“…The CDW phase transition could be driven not only by temperature but also by the electrical field. [10][11][12]20,39 More importantly, electrically driven CDW phase transition could be applied to high-efficiency oscillators and memristive switching devices. 10−12 In the VTe 2 films, we also found that the typical resistivity switching could be driven by an in-plane electrical field and the resistivity states are nonvolatile, which could be applied to nonvolatile memory devices.…”

“…Hall et al utilized a temperature-dependent investigation into CDW depinning in NbSe 3 to distinguish between the CDW slide and CDW switch. 20 The CDW slide was shown to result in a kink-type transition in the I−V response, while the CDW switch caused an abrupt change in resistance. In addition, the onset field of the CDW slide was explored and exhibited a negative correlation with temperature.…”

“…Charge density wave (CDW) as a novel effect in two-dimensional TMDs has obtained a rapid rise of interest for its physical nature and potential applications in oscillators , and memory devices . The CDW state is a quantum state consisting of a periodic modulation of the electronic charge density accompanied by a periodic distortion of the atomic lattice. − Early works on CDW effects were performed with bulk samples, for example, TaS 3 or NbSe 3 crystals, which have quasi-1D crystal structures of strongly bound 1D atomic chains, which are weakly bound together by van der Waals forces. − In the 1D system, the transition to the CDW state is conventionally described as the result of Fermi surface nesting giving an energy gap at the Fermi energy. Although the Fermi surface nesting theory is established well in the 1D system, the question of whether this theory actually applies to two-dimensional TMDs is on debate.…”

Switching and Phase-Slip Centers in Charge-Density-Wave Conductors

“…2 -3 In the temperature regime of switching, the threshold fields for the onset of switching are roughly temperature independent, although the associated hysteresis grows with decreasing temperature. 7 For the samples studied here, switching was no longer observed above 50 K in Fe x NbSe 3 or above 30 K in NbSe 3 . The experiments described above were repeated at various temperatures within and above the switching regime.…”