Mott materials: unsuccessful metals with a bright future

Milloch, Alessandra; Fabrizio, Michele; Giannetti, Claudio

doi:10.1038/s44306-024-00047-y

npj Spintronics

2024

DOI: 10.1038/s44306-024-00047-y

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Mott materials: unsuccessful metals with a bright future

Alessandra Milloch,

Michele Fabrizio,

Claudio Giannetti

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Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂

Yang,

Shi,

Zhong

et al. 2024

Nano Lett.

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Two-dimensional 1T-TaS 2 is renowned for its exotic physical properties including superconductivity, Mott physics, flat-band electronics, and charge density wave (CDW) orders. In particular, the CDW phase transitions (PTs) in 1T-TaS 2 attracted extensive research interest, showing prominent potential in electronic devices. However, mechanisms underlying electrically driven PTs remain elusive. Here, we systematically studied the evolution of multistep PTs during the I−V sweep in 1T-TaS 2 . Comprehensive investigations, covering variations in temperature, pulsed voltage duration, and light illumination, reveal that the underlying PT mechanism shifts from current-driven to thermally driven with increasing current. Initially, the current-driven PT step occurs at a constant current density, independent of the temperature. Subsequently, thermally driven PT steps manifest at a constant conductivity highly sensitive to the thermal effect. These transitions are strongly associated with the metastable CDW electronic structures and their response to carrier injection and thermal variations. Our findings reconcile long-standing debates regarding the electrically driven CDW PTs in 1T-TaS 2 .

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Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂

Yang,

Shi,

Zhong

et al. 2024

Nano Lett.

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show abstract

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Mott materials: unsuccessful metals with a bright future

Cited by 1 publication

References 138 publications

Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂

Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂

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Mott materials: unsuccessful metals with a bright future

Cited by 1 publication

References 138 publications

Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS2

Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS2

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Product

Resources

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Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂

Current-Driven to Thermally Driven Multistep Phase Transition of Charge Density Wave Order in 1T-TaS₂