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Himpsel FJ, McChesney JL, Crain JN, Kirakosian A, Pérez-Dieste V, Abbott NL, Luk YY, Nealey PF, Petrovykh DY. Stepped Silicon Surfaces as Templates for One-Dimensional Nanostructures. J Phys Chem B 2004. [DOI: 10.1021/jp049209f] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. J. Himpsel
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - J. L. McChesney
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - J. N. Crain
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - A. Kirakosian
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - V. Pérez-Dieste
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - Nicholas L. Abbott
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - Yan-Yeung Luk
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - Paul F. Nealey
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
| | - Dmitri Y. Petrovykh
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, Department of Chemical and Biological Engineering, UW-Madison, Madison, Wisconsin 53706, Physics Department, University of Maryland, College Park, Maryland 20742, and Naval Research Laboratory, Washington, D.C. 20375
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Crain JN, Kirakosian A, Altmann KN, Bromberger C, Erwin SC, McChesney JL, Lin JL, Himpsel FJ. Fractional band filling in an atomic chain structure. Phys Rev Lett 2003; 90:176805. [PMID: 12786093 DOI: 10.1103/physrevlett.90.176805] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2002] [Indexed: 05/24/2023]
Abstract
A new chain structure of Au is found on stepped Si(111) which exhibits a 1/4-filled band and a pair of > or =1/2-filled bands with a combined filling of 4/3. Band dispersions and Fermi surfaces for Si(553)-Au are obtained by photoemission and compared to that of Si(557)-Au. The dimensionality of both systems is determined using a tight binding fit. The fractional band filling makes it possible to preserve metallicity in the presence of strong correlations.
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Affiliation(s)
- J N Crain
- Department of Physics, UW-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA
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Losio R, Altmann KN, Kirakosian A, Lin JL, Petrovykh DY, Himpsel FJ. Band splitting for Si(557)-Au: is it spin-charge separation? Phys Rev Lett 2001; 86:4632-4635. [PMID: 11384301 DOI: 10.1103/physrevlett.86.4632] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2000] [Indexed: 05/23/2023]
Abstract
It has been proposed that the Si(557)-Au surface exhibits spin-charge separation in a one-dimensional electron liquid. Two narrowly spaced bands are found which exhibit a well-defined splitting at the Fermi level. That is incompatible with the assignment to a spinon-holon pair in a Luttinger liquid. Instead, we propose that the two bands are associated with two nearly degenerate atomic chains, or a chain of step atoms with two broken bonds. Such an assignment explains why the surface is metallic despite an even number of electrons per unit cell.
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Affiliation(s)
- R Losio
- Department of Physics, University of Durham, Durham DH1 3LE, United Kingdom
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