Electronic “Edge” State on Molybdenite Basal Plane Observed by Ultrahigh-Vacuum Scanning Tunneling Microscopy and Spectroscopy
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概要
- 論文の詳細を見る
An electronic state heretofore unreported has been found on a cleaved basal plane of a natural molybdenite (MoS2) single crystal by ultrahigh-vacuum scanning tunneling microscopy (UHV-STM), and examined in detail both by STM and scanning tunneling spectroscopy (STS). The new electronic state resides on the edge of the upper terrace of MoS2(0001), manifesting itself in the form of bright ridges with a width of ca. 4 nm along the step edges in negatively sample-biased STM images. This ridge structure is nonexistent in STM images taken with positive sample biases. STS showed that the local density of states (LDOS) on such ridge structures is much higher than that on the terraces in the range of 0.2–1.2 eV below the Fermi edge. The nature and origin of this high LDOS at the step edges are discussed.
- 2007-09-15
著者
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Tomita Hiroyuki
Graduate School Of Engineering Science Osaka University
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Komiyama Masaharu
Graduate School Of Medicine And Engineering Yamanashi University
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Komiyama Masaharu
Graduate School of Medicine and Engineering, Yamanashi University, Kofu 400-8511, Japan
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Yoda Eisuke
Graduate School of Medicine and Engineering, Yamanashi University, Kofu 400-8511, Japan
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Tomita Hiroyuki
Graduate School of Medicine and Engineering, Yamanashi University, Kofu 400-8511, Japan
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