The electric pulses induced multi-resistance states in the hysteresis temperature range of 1T-TaS2 and 1T-TaS1.6Se0.4

Abstract

The electric pulse-induced responses of 1T-TaS2 and 1T-TaS1.6Se0.4 crystals in the commensurate charge-density-wave (CCDW) phase in the hysteresis temperature range have been investigated. We observed that abrupt multi-steps of the resistance are excited by electric pulses at a fixed temperature forming multi-metastable like states. We propose that the response of the system corresponds to the rearrangements of the textures of CCDW domains and the multi-resistance states or the nonvolatile resistance properties excited simply by electric pulses have profound significance for the exploration of solid-state devices.

Direct identification of Mott Hubbard band pattern beyond charge density wave superlattice in monolayer 1T-NbSe2

“…For 2 example, the CDW order can induce a substantial narrowing of the band width near the Fermi level, and with further on-site Coulomb repulsion, a Mott gap is opened 19 . Hitherto, significant effort has been expended in manipulating the CDW order to induce the collapse of the Mott insulator, e.g., by pressure application 2,20 , chemical doping 21,22 , interfacial structure tuning 23,24 , interlayer stacking [25][26][27][28] , and pulse injection of ultrafast laser 25,29 , current 30,31 , or voltage [5][6][7] . The main efforts have focused on bulk TaS2 crystals.…”

A time-domain phase diagram of metastable states in a charge ordered quantum material

“…Such states are typically formed through phase transitions under non-equilibrium conditions and the nal state is reached through processes that span a large range of timescales. By using time-resolved optical techniques and femtosecond-pulse-excited scanning tunneling microscopy (STM), the evolution of the metastable states in the quasi-two-dimensional dichalcogenide 1T-TaS 2 is mapped out on a temporal phase diagram using the photon density and temperature as control parameters on timescales ranging from to s. The introduction of a time-domain axis in the phase diagram enables us to follow the evolution of metastable emergent states created by different phase transition mechanisms on different timescales, thus enabling comparison with theoretical predictions of the phase diagram and opening the way to understanding of the complex ordering processes in metastable materials.Short optical or electrical pulses can create non-equilibrium conditions that lead to electronic self-organization in quantum materials which can be usefully applied in various devices [1][2][3][4][5][6][7][8][9] . Recent rapid progress in the timedomain investigations of non-equilibrium phase transitions has led to the observation of a variety of emergent transient and metastable states in complex quantum materials, including organic electronic crystals 10 , oxides 11,12 , dichalcogenides 13 , and fullerene superconductors 14 .…”

A time-domain phase diagram of metastable states in a charge ordered quantum material

“…hort optical or electrical pulses can create non-equilibrium conditions that lead to electronic self-organization in quantum materials which can be usefully applied in various devices [1][2][3][4][5][6][7][8][9] . Recent rapid progress in the time-domain investigations of non-equilibrium phase transitions has led to the observation of a variety of emergent transient and metastable states in complex quantum materials, including organic electronic crystals 10 , oxides 11,12 , dichalcogenides 13 , and fullerene superconductors 14 .…”