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Nagao, Tadaaki; Hasegawa, Shuji; Tsuchie, Koji; Ino, Shuichi; Voges, C.; Klos, G.; Pfnür, H.; Henzler, M.

doi:10.1103/physrevb.57.10100

Cited by 111 publications

(87 citation statements)

References 26 publications

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“…The situation in the Au/Si͑111͒ case, on the other hand, becomes complicated since at biases տ0.1 eV the tunnelling current also involves the contribution from the surface state S 2 , resulting in a hexagonal appearance in the filled state STM images. 5,6 On the other hand, the difference in STM images may be also related to the intrinsic difference between the HCT and CHCT models. 2,3 In the HCT model, the metal trimers form a honeycomb pattern around Si trimers, while in the CHCT model, they form a hexagonal pattern, and the Si trimers show a honeycomb pattern around the metal trimers.…”

Section: Resultsmentioning

confidence: 99%

“…This explains the origin of domain walls on the ␣-ͱ3ϫͱ3 surface, i.e., the domain walls are actually domain boundaries between two possible ͱ3ϫͱ3 arrangements. [5][6][7][8] Thus the HCT instead of the CHCT model may be more suitable to describe the Au/Si͑111͒ ␣-ͱ3 ϫͱ3 surface without extra Au adatoms. Figure 4 shows a set of angle-resolved photoemission spectra from the room temperature ␤-ͱ3ϫͱ3 surface along the ⌫ -M -⌫ line of the ͱ3ϫͱ3 SBZ.…”

Section: Resultsmentioning

confidence: 99%

“…[5][6][7][8] It was concluded that the domain wall density of the ͱ3 ϫͱ3 phase becomes higher as the Au coverage increases, and that crystallization of the domain wall structure results in the 6ϫ6 phase at a Au coverage near 1 ML. 6,7 One interesting observation is that some empty state STM images of ␣-ͱ3ϫͱ3 also show a honeycomb pattern, 6,8 which suggests that the ␣-ͱ3ϫͱ3 and the Ag/Si͑111͒ ͱ3ϫͱ3 surfaces have a similar structure. For the 6ϫ6 phase, a pseudopentagonal glass model was proposed recently by Marks et al based on surface x-ray diffraction data.…”

Section: Introductionmentioning

confidence: 99%

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Surface electronic structure study of Au/Si(111) reconstructions: Observation of a crystal-to-glass transition

2002

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The ␣-ͱ3ϫͱ3, ␤-ͱ3ϫͱ3, and 6ϫ6 surfaces of Au/Si͑111͒ have been studied by angle-resolved photoelectron spectroscopy ͑ARPES͒. The ␣-ͱ3ϫͱ3 surface shows four surface state bands, one of which is a dispersing metallic band. Except for one nondispersing band near the Fermi level, the ␤-ͱ3ϫͱ3 surface shows surface bands that are similar to those of ␣-ͱ3ϫͱ3. Eight surface state bands have been found on the 6ϫ6 surface instead of two as reported in the literature. Seven of these surface states are broadened into three, when the 6ϫ6 phase is transformed into the quenched ␤-ͱ3ϫͱ3 phase just by annealing followed by quick cooling. The transition between the 6ϫ6 and quenched ␤-ͱ3ϫͱ3 phases is consistent with a crystal-glass transition.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface electronic structure study of Au/Si(111) reconstructions: Observation of a crystal-to-glass transition

2002

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“…24,25 The latter structure coexists with the 5 × 2 structure for coverage values up to one monolayer. Upon heating, both the 5 × 2 and the α √ 3 × √ 3 phases transform into a disordered 1 × 1 phase.…”

Section: Introductionmentioning

confidence: 89%

“…Since growth is linear the ratio between the gold coverages of the 5 × 2 and α √ 3 × √ 3 reconstructions can be directly determined from t 1 4 When we take for α √ 3× √ 3 the commonly accepted value of 1.00, 16,24,25,[33][34][35] our data lead to the remarkable conclusion that 5×2 is significantly higher than 0.6, the value on which the latest structural models are based.…”

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confidence: 96%

Titration of submonolayer Au growth on Si(111)

et al. 2014

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We study and analyze the growth of submonolayers of Au on Si(111) by a complementary set of surface techniques. Specifically, we focus on the 5 × 2 and the α √ 3 × √ 3 structures. We determine the gold coverage of these structures as a function of temperature by means of low energy electron diffraction (LEED) and low energy electron microscopy (LEEM). These results are independently calibrated by ex-situ ion scattering experiments. This allows us to present a phase diagram for this system. Remarkably, for all temperatures considered (820-1040 K), we find a coverage for the 5 × 2 phase that is significantly (≈10%) higher than the value of 0.6 monolayers which is assumed in the latest structural models. Therefore, a further refinement of the present picture of the quasi-one-dimensional 5 × 2 structure is required.

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Construction of an ELS-LEED: an electron energy-loss spectrometer with electrostatic two-dimensional angular scanning

Nagao

Hasegawa

2000

Surf. Interface Anal.

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A new version of an energy-loss spectrometer with low-energy electron diffraction (ELS-LEED, Henzler type EELS) has been constructed. Different from the prototype spectrometer, which is equipped with a single-pass 127 °cylindrical deflector analyser, the present spectrometer consists of an Ibach-type double-pass monochromator, an enlarged single-pass analyser and some magnetic lenses in acceleration and deceleration lenses and in the electrostatic deflection unit for high-resolution LEED. As a preliminary result, with the Si(111)-7 × 7 surface, the present spectrometer showed an energy width (full with at half-maximum) of 18 meV at the quasi-elastic peak and a transfer width of 960 Å at the (00) diffraction spot.

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Structural phase transitions ofSi(111)−(3×3

Cited by 111 publications

References 26 publications

Surface electronic structure study of Au/Si(111) reconstructions: Observation of a crystal-to-glass transition

Surface electronic structure study of Au/Si(111) reconstructions: Observation of a crystal-to-glass transition

Titration of submonolayer Au growth on Si(111)

Construction of an ELS-LEED: an electron energy-loss spectrometer with electrostatic two-dimensional angular scanning

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