The Ge(0 0 1) surface

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Abstract

Although germanium (Ge) (0 0 1) has a relatively small surface unit cell, this surface displays a wealth of fascinating phenomena. The Ge(0 0 1) surface is a prototypical example of a system possessing both a strong short-range interaction due to dimerization of the surface atoms, as well as an energetically weaker, long-range interaction related to the ordering of the dimers. In this review, I show how the key energetic parameters that govern the thermodynamic behavior of Ge(0 0 1) are extracted from scanning tunneling microscopy measurements. These energetic parameters are used to interpret several surface phase transitions: the 2D equilibrium shape evolution of islands and vacancy islands; the order-disorder c(4×2)→(2×1) phase transition; the orientational phase diagram; and, the faceting of [0 1 0] oriented steps. Particular attention is paid to the differences between Ge (0 0 1) and the closely related and technologically important silicon (Si) (0 0 1) surface.
Original languageUndefined
Pages (from-to)1-40
JournalPhysics reports
Volume388
Issue number1
DOIs
Publication statusPublished - 2003

Keywords

  • IR-73075

Cite this

Zandvliet, Henricus J.W. / The Ge(0 0 1) surface. In: Physics reports. 2003 ; Vol. 388, No. 1. pp. 1-40.
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The Ge(0 0 1) surface. / Zandvliet, Henricus J.W.

In: Physics reports, Vol. 388, No. 1, 2003, p. 1-40.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - The Ge(0 0 1) surface

AU - Zandvliet, Henricus J.W.

PY - 2003

Y1 - 2003

N2 - Although germanium (Ge) (0 0 1) has a relatively small surface unit cell, this surface displays a wealth of fascinating phenomena. The Ge(0 0 1) surface is a prototypical example of a system possessing both a strong short-range interaction due to dimerization of the surface atoms, as well as an energetically weaker, long-range interaction related to the ordering of the dimers. In this review, I show how the key energetic parameters that govern the thermodynamic behavior of Ge(0 0 1) are extracted from scanning tunneling microscopy measurements. These energetic parameters are used to interpret several surface phase transitions: the 2D equilibrium shape evolution of islands and vacancy islands; the order-disorder c(4×2)→(2×1) phase transition; the orientational phase diagram; and, the faceting of [0 1 0] oriented steps. Particular attention is paid to the differences between Ge (0 0 1) and the closely related and technologically important silicon (Si) (0 0 1) surface.

AB - Although germanium (Ge) (0 0 1) has a relatively small surface unit cell, this surface displays a wealth of fascinating phenomena. The Ge(0 0 1) surface is a prototypical example of a system possessing both a strong short-range interaction due to dimerization of the surface atoms, as well as an energetically weaker, long-range interaction related to the ordering of the dimers. In this review, I show how the key energetic parameters that govern the thermodynamic behavior of Ge(0 0 1) are extracted from scanning tunneling microscopy measurements. These energetic parameters are used to interpret several surface phase transitions: the 2D equilibrium shape evolution of islands and vacancy islands; the order-disorder c(4×2)→(2×1) phase transition; the orientational phase diagram; and, the faceting of [0 1 0] oriented steps. Particular attention is paid to the differences between Ge (0 0 1) and the closely related and technologically important silicon (Si) (0 0 1) surface.

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