Topological-metal to band-insulator transition in (Bi 1-xIn x) 2Se 3 thin films

Matthew Brahlek, Namrata Bansal, Nikesh Koirala, Su Yang Xu, Madhab Neupane, Chang Liu, M. Zahid Hasan, Seongshik Oh

Research output: Contribution to journalArticlepeer-review

191 Scopus citations

Abstract

By combining transport and photoemission measurements on (Bi 1-xIn x) 2Se 3 thin films, we report that this system transforms from a topologically nontrivial metal into a topologically trivial band insulator through three quantum phase transitions. At x≈3%-7%, there is a transition from a topologically nontrivial metal to a trivial metal. At x≈15%, the metal becomes a variable-range-hopping insulator. Finally, above x≈25%, the system becomes a true band insulator with its resistance immeasurably large even at room temperature. This material provides a new venue to investigate topologically tunable physics and devices with seamless gating or tunneling insulators.

Original languageEnglish
Article number186403
JournalPhysical Review Letters
Volume109
Issue number18
DOIs
StatePublished - Oct 31 2012
Externally publishedYes

Funding

FundersFunder number
National Science Foundation1006492

    Fingerprint

    Dive into the research topics of 'Topological-metal to band-insulator transition in (Bi 1-xIn x) 2Se 3 thin films'. Together they form a unique fingerprint.

    Cite this