Strong lateral electron coupling of Pb nanowires on stepped Si(111)

Angle-resolved photoemission studies

Keun Su Kim, Harumo Morikawa, Won Hoon Choi, Han Woong Yeom

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We employ angle-resolved photoemission to characterize the electronic band structure of the Pb "nanowire" array self-assembled on a stepped Si(111) surface. Despite the highly oriented nanowires observed in scanning tunneling microscopy images, we find essentially two-dimensional Fermi contours modulated one dimensionally perpendicular to the wires. This strong two-dimensional and quasi-one-dimensional nature of the band structure explains the stability and anisotropy of the metallic phase down to 4 K as reported recently. A simple tight-binding model with each Si nanoterrace covered by a densely packed Pb overlayer successfully reproduces this modulated band structure and quantifies the electron coupling within the " nanostripes" and the step-edge potential.

Original languageEnglish
Article number196804
JournalPhysical Review Letters
Volume99
Issue number19
DOIs
Publication statusPublished - 2007 Nov 8

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nanowires
photoelectric emission
electrons
scanning tunneling microscopy
wire
anisotropy
electronics

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "We employ angle-resolved photoemission to characterize the electronic band structure of the Pb {"}nanowire{"} array self-assembled on a stepped Si(111) surface. Despite the highly oriented nanowires observed in scanning tunneling microscopy images, we find essentially two-dimensional Fermi contours modulated one dimensionally perpendicular to the wires. This strong two-dimensional and quasi-one-dimensional nature of the band structure explains the stability and anisotropy of the metallic phase down to 4 K as reported recently. A simple tight-binding model with each Si nanoterrace covered by a densely packed Pb overlayer successfully reproduces this modulated band structure and quantifies the electron coupling within the {"} nanostripes{"} and the step-edge potential.",
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Strong lateral electron coupling of Pb nanowires on stepped Si(111) : Angle-resolved photoemission studies. / Kim, Keun Su; Morikawa, Harumo; Choi, Won Hoon; Yeom, Han Woong.

In: Physical Review Letters, Vol. 99, No. 19, 196804, 08.11.2007.

Research output: Contribution to journalArticle

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AU - Choi, Won Hoon

AU - Yeom, Han Woong

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