Low-Frequency Noise Spectroscopy of Charge-Density-Wave Phase Transitions in Vertical Quasi-2D Devices

Ruben Salgado; Amirmahdi Mohammadzadeh; Fariborz Kargar; Adane Geremew; Chun-Yu Huang; Matthew A. Bloodgood; Sergey Rumyantsev; Tina T. Salguero; Alexander A. Balandin

doi:10.7567/1882-0786/ab0397

Low-Frequency Noise Spectroscopy of Charge-Density-Wave Phase Transitions in Vertical Quasi-2D Devices

Mesoscale and Nanoscale Physics 2019-08-20 v1 Materials Science

Authors: Ruben Salgado , Amirmahdi Mohammadzadeh , Fariborz Kargar , Adane Geremew , Chun-Yu Huang , Matthew A. Bloodgood , Sergey Rumyantsev , Tina T. Salguero , Alexander A. Balandin

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Abstract

We report results regarding the electron transport in vertical quasi-2D layered 1T-TaS2 charge-density-wave devices. The low-frequency noise spectroscopy was used as a tool to study changes in the cross-plane electrical characteristics of the quasi-2D material below room temperature. The noise spectral density revealed strong peaks - changing by more than an order-of-magnitude - at the temperatures closely matching the electrical resistance steps. Some of the noise peaks appeared below the temperature of the commensurate to nearly-commensurate charge-density-wave transition, possibly indicating the presence of the debated "hidden" phase transitions. These results confirm the potential of the noise spectroscopy for investigations of electron transport and phase transitions in novel materials.

Keywords

low-frequency noise spectroscopy charge-density-wave quasi-2d devices 1t-tas2 phase transitions electron transport hidden phase

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@article{arxiv.1901.01475,
  title  = {Low-Frequency Noise Spectroscopy of Charge-Density-Wave Phase Transitions in Vertical Quasi-2D Devices},
  author = {Ruben Salgado and Amirmahdi Mohammadzadeh and Fariborz Kargar and Adane Geremew and Chun-Yu Huang and Matthew A. Bloodgood and Sergey Rumyantsev and Tina T. Salguero and Alexander A. Balandin},
  journal= {arXiv preprint arXiv:1901.01475},
  year   = {2019}
}

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16 pages; 5 figures

Low-Frequency Noise Spectroscopy of Charge-Density-Wave Phase Transitions in Vertical Quasi-2D Devices

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