Ultrathin Topological Insulator Bi 2 Se 3 Nanoribbons Exfoliated by Atomic Force Microscopy

Handle URI:
http://hdl.handle.net/10754/600121
Title:
Ultrathin Topological Insulator Bi 2 Se 3 Nanoribbons Exfoliated by Atomic Force Microscopy
Authors:
Hong, Seung Sae; Kundhikanjana, Worasom; Cha, Judy J.; Lai, Keji; Kong, Desheng; Meister, Stefan; Kelly, Michael A.; Shen, Zhi-Xun; Cui, Yi
Abstract:
Ultrathin topological insulator nanostructures, in which coupling between top and bottom surface states takes place, are of great intellectual and practical importance. Due to the weak van der Waals interaction between adjacent quintuple layers (QLs), the layered bismuth selenide (Bi2Se 3), a single Dirac-cone topological insulator with a large bulk gap, can be exfoliated down to a few QLs. In this paper, we report the first controlled mechanical exfoliation of Bi2Se3 nanoribbons (>50 QLs) by an atomic force microscope (AFM) tip down to a single QL. Microwave impedance microscopy is employed to map out the local conductivity of such ultrathin nanoribbons, showing drastic difference in sheet resistance between 1-2 QLs and 4-5 QLs. Transport measurement carried out on an exfoliated (>5 QLs) Bi2Se3 device shows nonmetallic temperature dependence of resistance, in sharp contrast to the metallic behavior seen in thick (>50 QLs) ribbons. These AFM-exfoliated thin nanoribbons afford interesting candidates for studying the transition from quantum spin Hall surface to edge states. © 2010 American Chemical Society.
Citation:
Hong SS, Kundhikanjana W, Cha JJ, Lai K, Kong D, et al. (2010) Ultrathin Topological Insulator Bi 2 Se 3 Nanoribbons Exfoliated by Atomic Force Microscopy . Nano Lett 10: 3118–3122. Available: http://dx.doi.org/10.1021/nl101884h.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-11-001-12; KUS-FI-033-02
Issue Date:
11-Aug-2010
DOI:
10.1021/nl101884h
PubMed ID:
20698625
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
Y.C. acknowledges the support from the Keck Foundation. This work is also made possible by the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-11-001-12) and KAUST GRP Fellowship (No. KUS-FI-033-02), NSF Grant DMR-0906027, and Center of Probing the Nanoscale, Stanford University (NSF Grant PHY-0425897)
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHong, Seung Saeen
dc.contributor.authorKundhikanjana, Worasomen
dc.contributor.authorCha, Judy J.en
dc.contributor.authorLai, Kejien
dc.contributor.authorKong, Deshengen
dc.contributor.authorMeister, Stefanen
dc.contributor.authorKelly, Michael A.en
dc.contributor.authorShen, Zhi-Xunen
dc.contributor.authorCui, Yien
dc.date.accessioned2016-02-28T06:43:07Zen
dc.date.available2016-02-28T06:43:07Zen
dc.date.issued2010-08-11en
dc.identifier.citationHong SS, Kundhikanjana W, Cha JJ, Lai K, Kong D, et al. (2010) Ultrathin Topological Insulator Bi 2 Se 3 Nanoribbons Exfoliated by Atomic Force Microscopy . Nano Lett 10: 3118–3122. Available: http://dx.doi.org/10.1021/nl101884h.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid20698625en
dc.identifier.doi10.1021/nl101884hen
dc.identifier.urihttp://hdl.handle.net/10754/600121en
dc.description.abstractUltrathin topological insulator nanostructures, in which coupling between top and bottom surface states takes place, are of great intellectual and practical importance. Due to the weak van der Waals interaction between adjacent quintuple layers (QLs), the layered bismuth selenide (Bi2Se 3), a single Dirac-cone topological insulator with a large bulk gap, can be exfoliated down to a few QLs. In this paper, we report the first controlled mechanical exfoliation of Bi2Se3 nanoribbons (>50 QLs) by an atomic force microscope (AFM) tip down to a single QL. Microwave impedance microscopy is employed to map out the local conductivity of such ultrathin nanoribbons, showing drastic difference in sheet resistance between 1-2 QLs and 4-5 QLs. Transport measurement carried out on an exfoliated (>5 QLs) Bi2Se3 device shows nonmetallic temperature dependence of resistance, in sharp contrast to the metallic behavior seen in thick (>50 QLs) ribbons. These AFM-exfoliated thin nanoribbons afford interesting candidates for studying the transition from quantum spin Hall surface to edge states. © 2010 American Chemical Society.en
dc.description.sponsorshipY.C. acknowledges the support from the Keck Foundation. This work is also made possible by the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-11-001-12) and KAUST GRP Fellowship (No. KUS-FI-033-02), NSF Grant DMR-0906027, and Center of Probing the Nanoscale, Stanford University (NSF Grant PHY-0425897)en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectatomic force microscopyen
dc.subjectbismuth selenideen
dc.subjectmechanical exfoliationen
dc.subjectnanoribbonen
dc.subjectTopological insulatoren
dc.titleUltrathin Topological Insulator Bi 2 Se 3 Nanoribbons Exfoliated by Atomic Force Microscopyen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
kaust.grant.numberKUS-11-001-12en
kaust.grant.numberKUS-FI-033-02en

Related articles on PubMed

All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.