Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface

K. H. Wu; A. I. Oreshkin; Y. Takamura; Y. Fujikawa; T. Nagao; T. Briere; V. Kumar; Y. Kawazoe; R. F. Dou; J. F. Jia; Q. K. Xue; T. Sakurai

doi:10.1103/PhysRevB.70.195417

Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface

K. H. Wu, A. I. Oreshkin, Y. Takamura, Y. Fujikawa, T. Nagao, T. Briere, V. Kumar, Y. Kawazoe, R. F. Dou, J. F. Jia, Q. K. Xue, T. Sakurai

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We report a temperature-dependent scanning tunneling microscopy study of Na adsorption on the Si(111)-(7 X 7) surface by cooling the surface from room temperature to 80 K. While at room temperature Na atoms can diffuse freely on the surface to form a two-dimensional gas, their motion is confined within the 7 X 7 half-unit cells at 160 K. With further cooling to 80 K, Na atoms become localized within individual "basins." The estimated diffusion barriers of Na atoms on the Si(111)-(7 X 7) surface and nature of interaction among them agree well with our theoretical predictions.

Original language	English
Article number	195417
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.70.195417
Publication status	Published - 2004 Nov
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.70.195417

Cite this

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title = "Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface",

abstract = "We report a temperature-dependent scanning tunneling microscopy study of Na adsorption on the Si(111)-(7 X 7) surface by cooling the surface from room temperature to 80 K. While at room temperature Na atoms can diffuse freely on the surface to form a two-dimensional gas, their motion is confined within the 7 X 7 half-unit cells at 160 K. With further cooling to 80 K, Na atoms become localized within individual {"}basins.{"} The estimated diffusion barriers of Na atoms on the Si(111)-(7 X 7) surface and nature of interaction among them agree well with our theoretical predictions.",

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T1 - Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface

AU - Wu, K. H.

AU - Oreshkin, A. I.

AU - Takamura, Y.

AU - Fujikawa, Y.

AU - Nagao, T.

AU - Briere, T.

AU - Kumar, V.

AU - Kawazoe, Y.

AU - Dou, R. F.

AU - Jia, J. F.

AU - Xue, Q. K.

AU - Sakurai, T.

PY - 2004/11

Y1 - 2004/11

N2 - We report a temperature-dependent scanning tunneling microscopy study of Na adsorption on the Si(111)-(7 X 7) surface by cooling the surface from room temperature to 80 K. While at room temperature Na atoms can diffuse freely on the surface to form a two-dimensional gas, their motion is confined within the 7 X 7 half-unit cells at 160 K. With further cooling to 80 K, Na atoms become localized within individual "basins." The estimated diffusion barriers of Na atoms on the Si(111)-(7 X 7) surface and nature of interaction among them agree well with our theoretical predictions.

AB - We report a temperature-dependent scanning tunneling microscopy study of Na adsorption on the Si(111)-(7 X 7) surface by cooling the surface from room temperature to 80 K. While at room temperature Na atoms can diffuse freely on the surface to form a two-dimensional gas, their motion is confined within the 7 X 7 half-unit cells at 160 K. With further cooling to 80 K, Na atoms become localized within individual "basins." The estimated diffusion barriers of Na atoms on the Si(111)-(7 X 7) surface and nature of interaction among them agree well with our theoretical predictions.

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Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface

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