Low-Frequency Current Fluctuations and Sliding of the Charge Density Waves in Two-Dimensional Materials
| Autor: | Matthew A. Bloodgood, Alexander A. Balandin, Guanxiong Liu, Sergey L. Rumyantsev, Tina T. Salguero |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Phase transition Materials science Condensed matter physics Mechanical Engineering Infrasound Charge density Bioengineering 02 engineering and technology General Chemistry Low frequency 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Noise (electronics) Condensed Matter::Superconductivity 0103 physical sciences Physical Sciences and Mathematics Condensed Matter::Strongly Correlated Electrons General Materials Science 0210 nano-technology Transport phenomena Charge density wave Voltage |
| Zdroj: | Liu, Guanxiong; Rumyantsev, Sergey; Bloodgood, Matthew A.; Salguero, Tina T.; & Balandin, Alexander A.(2018). Low-Frequency Current Fluctuations and Sliding of the Charge Density Waves in Two-Dimensional Materials. ACS Nano Letters. UC Office of the President: UC Lab Fees Research Program (LFRP); a funding opportunity through UC Research Initiatives (UCRI). Retrieved from: http://www.escholarship.org/uc/item/9j46p5f8 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | We investigated low-frequency noise in two-dimensional (2D) charge density wave (CDW) systems, 1T-TaS2 thin films, as they were driven from the nearly commensurate (NC) to incommensurate (IC) CDW phases by voltage and temperature stimuli. This study revealed that noise in 1T-TaS2 has two pronounced maxima at the bias voltages, which correspond to the onset of CDW sliding and the NC-to-IC phase transition. We observed unusual Lorentzian features and exceptionally strong noise dependence on electric bias and temperature, leading to the conclusion that electronic noise in 2D CDW systems has a unique physical origin different from known fundamental noise types. We argue that noise spectroscopy can serve as a useful tool for understanding electronic transport phenomena in 2D CDW materials characterized by coexistence of different phases and strong pinning. |
| Databáze: | OpenAIRE |
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