Scanning-tunneling-microscopy analysis of the charge-density-wave structure in NbSe sub 3

Journal Article · Sat Aug 15 04:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.46.4917· OSTI ID:7165538

Ren, J; Whangbo, M ^[1]

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1. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204 (United States)

{sup 93}Nb NMR and scanning-tunneling-microscopy (STM) studies lead to different conclusions on the question of which chains are involved in the formation of the two charge-density waves (CDW's) in NbSe{sub 3}. To resolve this conflict, we calculated the STM images of a single NbSe{sub 3} layer and analyzed the local densities of states (LDOS) of Nb and Se atoms in the vicinity of the Fermi level. The conflict arises from the fact that {sup 93}Nb NMR and STM measurements probe the LDOS of different atoms (Nb and Se atoms, respectively) at the Fermi level. Concerning the question of which chains are responsible for the CDW formation in NbSe{sub 3}, however, the conclusion of the {sup 93}Nb NMR studies is appropriate because the major character of the electrons at the Fermi level is the Nb atoms of type-I and -III chains.

• DOE Contract Number: FG05-86ER45259
• OSTI ID: 7165538
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:8; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

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360104* -- Metals & Alloys-- Physical Properties
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IMAGES
MATHEMATICS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
NUMERICAL ANALYSIS
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
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TUNNEL EFFECT