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

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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 (US)
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
State	Published - Nov 2004
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Wu, K. H., Oreshkin, A. I., Takamura, Y., Fujikawa, Y., Nagao, T., Briere, T., Kumar, V., Kawazoe, Y., Dou, R. F., Jia, J. F., Xue, Q. K., & Sakurai, T. (2004). Step-by-step cooling of a two-dimensional Na gas on the Si(111)-(7 X 7) surface. Physical Review B - Condensed Matter and Materials Physics, 70(19), 1-4. Article 195417. https://doi.org/10.1103/PhysRevB.70.195417

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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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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

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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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