ICTS:29171

Video URL

CT- Low-frequency resistance noise in near magic-angle twisted bilayer graphene

CT- Low-frequency resistance noise in near magic-angle twisted bilayer graphene

(2024). CT- Low-frequency resistance noise in near magic-angle twisted bilayer graphene. SciVideos. https://youtu.be/s4QKEBC_0Vg

CT- Low-frequency resistance noise in near magic-angle twisted bilayer graphene. SciVideos, Jul. 23, 2024, https://youtu.be/s4QKEBC_0Vg 

          @misc{ scivideos_ICTS:29171,
            doi = {},
            url = {https://youtu.be/s4QKEBC_0Vg},
            author = {},
            keywords = {},
            language = {en},
            title = {CT- Low-frequency resistance noise in near magic-angle twisted bilayer graphene},
            publisher = {},
            year = {2024},
            month = {jul},
            note = {ICTS:29171 see, \url{https://scivideos.org/icts-tifr/29171}}
          }
Pritam Pal
Talk numberICTS:29171
Source RepositoryICTS-TIFR
Source EventEngineered 2D Quantum Materials
Collection

Abstract

The low-frequency fluctuations, or noise, in electrical resistance not only set a performance benchmark in devices, but also form a sensitive tool to probe non-trivial electronic phases and band structure in solids. Here we report the measurement of such noise in the electrical resistance in twisted bilayer graphene (tBLG), where the layers are misoriented close to the magic angle (θ ∼ 1 degree). At high temperatures (T >∼ 60 − 70 K), the power spectral density (PSD) of the fluctuations inside the low-energy moir ́e bands is predominantly ∝ 1/f, where f is the frequency, being generally lowest close to the magic angle, and can be well-explained within the conventional Mc. Whorter model of the ‘1/f noise’ with trap-assisted density-mobility fluctuations. At low T (