# Tuning the quantum oscillations of surface Dirac electrons in the topological insulator Bi2Te2Se by liquid gating

## Author(s): Xiong, Jun; Khoo, Yuehaw; Jia, Shuang; Cava, Robert J; Ong, Nai Phuan

To refer to this page use: http://arks.princeton.edu/ark:/88435/pr1v10q
DC FieldValueLanguage
dc.contributor.authorXiong, Jun-
dc.contributor.authorKhoo, Yuehaw-
dc.contributor.authorJia, Shuang-
dc.contributor.authorCava, Robert J-
dc.contributor.authorOng, Nai Phuan-
dc.date.accessioned2018-07-20T15:10:52Z-
dc.date.available2018-07-20T15:10:52Z-
dc.date.issued2013-07-15en_US
dc.identifier.citationXiong, Jun, Khoo, Yuehaw, Jia, Shuang, Cava, RJ, Ong, NP. (2013). Tuning the quantum oscillations of surface Dirac electrons in the topological insulator Bi2Te2Se by liquid gating. PHYSICAL REVIEW B, 88 (10.1103/PhysRevB.88.035128en_US
dc.identifier.issn1098-0121-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1v10q-
dc.description.abstractIn Bi2Te2Se, the period of quantum oscillations arising from surface Dirac fermions can be increased sixfold using ionic liquid gating. At high gate voltages, the Fermi energy reaches the N = 1 Landau level in a 14-T field. This enables the 1/2 shift predicted for the Dirac spectrum to be measured accurately. A surprising result is that liquid gating strongly enhances the surface mobility. By analyzing the Hall conductivity, we show that the enhancement occurs on only one surface. We present evidence that the gating process is fully reversible (hence consistent with band bending by the E field from the anion layer accumulated). In addition to the surface carriers, the experiment yields the mobility and density of the bulk carriers in the impurity band. By analyzing the charge accumulation vs gate voltage, we also obtain estimates of the depletion width and the areal depletion capacitance C-d/A. The value of C-d/A implies an enhanced electronic polarizability in the depletion region.en_US
dc.language.isoenen_US
dc.relation.ispartofPHYSICAL REVIEW Ben_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleTuning the quantum oscillations of surface Dirac electrons in the topological insulator Bi2Te2Se by liquid gatingen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1103/PhysRevB.88.035128-
dc.date.eissued2013-07-22en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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