Electronic Properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mn>1</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>c</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4</mml:mn><mml:mo>×</mml:mo><mml:mn>2</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>Domains on Ge(001) Studied by Scanning Tunneling

Gürlü, O.; Zandvliet, Henricus J.W.; Poelsema, Bene

doi:10.1103/physrevlett.93.066101

Cited by 65 publications

(22 citation statements)

References 19 publications

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“…Both methods produce, after annealing or flashing respectively, excellent long-range order of the plain Ge(001) surface. This is verified by low-energy electron diffraction (LEED), showing the coexistence of p(2 × 1) and c(4 × 2) order as is characteristic of the Ge(001) surface at room temperature [41,42].…”

Section: Experimental Considerationsmentioning

confidence: 62%

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Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

et al. 2009

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Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties Abstract. Atomic structures of quasi-one-dimensional (1D) character can be grown on semiconductor substrates by metal adsorption. Significant progress concerning study of their 1D character has been achieved recently by condensing noble metal atoms on the Ge(001) surface. In particular, Pt and Au yield high quality reconstructions with low defect densities. We report on the self-organized growth and the long-range order achieved, and present data from scanning tunneling microscopy (STM) on the structural components. For Pt/Ge(001), we find hot substrate growth is the preferred method for self-organization. Despite various dimerized bonds, these atomic wires exhibit metallic conduction at room temperature, as documented by low-bias STM. For the recently discovered Au/Ge(001) nanowires, we have developed a deposition technique that allows complete substrate coverage. The Au nanowires are extremely well separated spatially, exhibit a continuous 1D charge density, and are of solid metallic conductance. In this review, we present structural details for both types of nanowires, and discuss similarities and differences. A perspective is given for their potential to host a 1D electron system. The ability to condense different noble metal nanowires demonstrates how atomic control of the structure affects the electronic properties.

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Section: Experimental Considerationsmentioning

confidence: 62%

“…Here a (2 × 1) and a c(4 × 2) reconstruction coexist [41,42] at room temperature, because in this temperature range they are energetically equivalent. The atom spacing amounts to ∼4 Å between dimers of the undistorted (2 × 1) phase.…”

Section: Structure With Stmmentioning

confidence: 99%

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

et al. 2009

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“…2 of Ref. [8]) arises from the back bond surface states. The observed low intensity of this spectral peak results from the significant dispersion of these states around the ÿ point.…”

Section: (D)] the Appearance Is Intermediate Between The Double-lobedmentioning

confidence: 96%

“…This assignment was based on the observation that the valence band structure remained essentially unchanged for temperatures between 130 and 680 K, as well as being unaffected by the chemisorption of hydrogen. A recent scanning tunneling spectroscopy (STS) experiment [8] identified the dangling bond state on Ge001c4 2 as being ÿ0:8 eV below E F . The same report suggested that a feature at ÿ0:5 eV could also be linked to the dangling bonds while, interestingly, a clearly visible spectral feature at ÿ 0:1 eV was not discussed at all.…”

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confidence: 99%

Valence Surface Electronic States on Ge(001)

et al. 2008

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The optical, electrical, and chemical properties of semiconductor surfaces are largely determined by their electronic states close to the Fermi level (E{F}). We use scanning tunneling microscopy and density functional theory to clarify the fundamental nature of the ground state Ge(001) electronic structure near E{F}, and resolve previously contradictory photoemission and tunneling spectroscopy data. The highest energy occupied surface states were found to be exclusively back bond states, in contrast to the Si(001) surface, where dangling bond states also lie at the top of the valence band.

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“…[1][2][3][4] Germanium, in particular, is preferred for industrial applications due to its higher mobility and smaller bandgap as compared to silicon. Similar to Si (001), Ge (001) also has several reconstruction structures which can offer a variety of applications.…”

Section: Introductionmentioning

confidence: 99%

Dihydride structures of deuterium on germanium (001) surfaces

Sarhan

Ching

Nakanishi

et al. 2013

Journal of Applied Physics

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Structures of deuterium (D) adsorbed on germanium (001) surface were studied by the density functional theory (DFT) calculations and by the scanning tunneling microscope (STM). Two structures of dihydride adsorption were identified on the Ge (001) surface by STM measurements and confirmed by DFT calculated topographies. Also, differences in structural stabilities were explained based on binding strength differences with Ge and on hybridization effect of the s-orbital of D with the Ge p states. The excitation mode of 0.18 eV observed in the STM dI/dV spectrum was found to correspond to the DFT calculated D-Ge stretching vibration mode of 0.17 eV.

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Electronic Properties of(2×1)andc(4×2)Domains on Ge(001) Studied by Scanning Tunneling

Cited by 65 publications

References 19 publications

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

Valence Surface Electronic States on Ge(001)

Dihydride structures of deuterium on germanium (001) surfaces

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