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ID 21544
本文ファイル
著者
Okada, Junpei T.
Yokoyama, Yoshihiko
Takasaki, Tomoaki
Watanabe, Yasuhiro
Nanao, Susumu
キーワード
quasicrystals
electronic structure
tunneling spectroscopy
break junction
pseudogap
NDC
物理学
抄録(英)
Recent theoretical works have predicted that quasicrystals (QCs) have conspicuous fine electronic structures near the Fermi level (EF); the density of states (DOS) consists of sharp peaks and deep valleys with several lOmeV intervals, which is often called spiky structures. These fine electronic structures are believed to explain the extremely high resistivity of QCs. However, no experiment of observing the fine structures has succeeded for more than ten years. Wehave investigated the DOS around EF on icosahedral (i-)AlCuFe, i-AlPdMn, and decagonal (d-)AlCuCo quasicrystals by break junction tunneling spectroscopy at 4.2K and have observed clear peaks of 3.3 ~ 125mV width near EF. Each peak can be expressed by the probability distribution of the narrow energy gaps that are similar to BCS gaps. This is the first direct experimental result that confirms the predicted spiky structures existing in the vicinity of EF.
掲載誌名
Journal of the Physical Society of Japan
76巻
3号
開始ページ
033707-1
終了ページ
033707-4
出版年月日
2007-03
出版者
日本物理学会
ISSN
0031-9015
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 The Physical Society of Japan
関連情報URL
部局名
総合科学研究科