Energy-gap opening in a Bi(110) nanoribbon induced by edge reconstruction

Sun, Jia-Tao, Huang, Han, Wong, Swee Liang, Gao, H.-J., Feng, Yuan Ping and Wee, Andrew Thye Shen (2012) Energy-gap opening in a Bi(110) nanoribbon induced by edge reconstruction. Physical Review Letters, 109 24: 246804-1-246804-5. doi:10.1103/PhysRevLett.109.246804

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Author Sun, Jia-Tao
Huang, Han
Wong, Swee Liang
Gao, H.-J.
Feng, Yuan Ping
Wee, Andrew Thye Shen
Title Energy-gap opening in a Bi(110) nanoribbon induced by edge reconstruction
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2012-12-11
Year available 2012
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.109.246804
Open Access Status File (Publisher version)
Volume 109
Issue 24
Start page 246804-1
End page 246804-5
Total pages 5
Place of publication College Park, MD United States
Publisher American Physical Society
Collection year 2012
Language eng
Subject 3100 Physics and Astronomy
Abstract Scanning tunnelling microscopy and spectroscopy experiments complemented by first-principles calculations have been conducted to study the electronic structure of 4 monolayer Bi(110) nanoribbons on epitaxial graphene on silicon carbide [4H-SiC(0001)]. In contrast with the semimetal property of elemental bismuth, an energy gap of 0.4ÂeV is measured at the centre of the Bi(110) nanoribbons. Edge reconstructions, which can facilitate the edge strain energy release, are found to be responsible for the band gap opening. The calculated density of states around the Fermi level are decreased quickly to zero from the terrace edge to the middle of a Bi(110) nanoribbon potentially signifying a spatial metal-to-semiconductor transition. This study opens new avenues for room-temperature bismuth nanoribbon-based electronic devices.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 07 Nov 2013, 12:08:10 EST by Deanna Mahony on behalf of School of Mechanical and Mining Engineering