Charge-density Wave Phase Transitions on Crystal Surfaces
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- HATTA Shinichiro
- Kyoto University JST-CREST
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- ARUGA Tetsuya
- Kyoto University JST-CREST
Bibliographic Information
- Other Title
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- 結晶表面における電荷密度波相転移
- ケッショウ ヒョウメン ニ オケル デンカ ミツドハソウ テンイ
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Description
Critical behavior and structural change during the phase transitions of charge-density-wave (CDW) states on In/Cu(001) and In/Si(111) have been studied by surface X-ray diffraction (SXRD). The In/Cu(001) surface exhibits critical behavior of the two-dimensional Ising model, indicating an order-disorder transition at T=345 K, ∼60 K lower than the electronic metal-insulator transition (MIT). It has been found that the scale-down of lattice correlation to the CDW correlation length (∼60 Å) causes instability of the CDW state, giving rise to MIT. For In/Si(111), the superstructure spot belonging to CDW shows an intensity drop in a temperature range (115-125 K) where MIT also takes place without critical scattering and with concomitant intensity increase of the other spot. Considering other experimental and theoretical results, we suggest a pseudo-first-order transition mechanism.
Journal
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- Hyomen Kagaku
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Hyomen Kagaku 33 (9), 513-518, 2012
The Surface Science Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206457928320
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- NII Article ID
- 130004486778
- 10031068537
- 40019432898
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- NII Book ID
- AN00334149
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- ISSN
- 18814743
- 03885321
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- NDL BIB ID
- 023980503
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed