Strong localization in suspended monolayer graphene by intervalley scattering

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Yanık, Cenk and Sazgari Ardakani, Vahid and Canatar, Abdülkadir and Vaheb, Yaser and Kaya, İsmet İnönü (2021) Strong localization in suspended monolayer graphene by intervalley scattering. Physical Review B, 103 (8). ISSN 2469-9950 (Print) 2469-9969 (Online)

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Abstract

A gate-induced insulating behavior at zero magnetic field is observed in a high-mobility suspended monolayer graphene near the charge neutrality point. The graphene device initially cleaned by a current annealing technique underwent a thermopressure cycle to allow short-range impurities to be adsorbed directly by the ultraclean graphene surface. The adsorption process generated a strong temperature- and electric-field-dependent behavior on the conductance of the graphene device. The conductance around the neutrality point is observed to be reduced from around e2/h at 30 K to ∼0.01e2/h at 20 mK. A direct transition from an insulator to a quantum Hall conductor within ≈0.4T accompanied by broken-symmetry-induced ν=0,±1 plateaus confirms the presence of intervalley scatterers.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: İsmet İnönü Kaya
Date Deposited: 18 Aug 2022 12:46
Last Modified: 18 Aug 2022 12:46
URI: https://research.sabanciuniv.edu/id/eprint/43321

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