Extremely Small Energy Gap in the Quasi-One-Dimensional Conducting Chain Compound SrNbO$_{3.41}$

A. Herrnberger; B. Gorshunov; C. A. Kuntscher; F. Lichtenberg; F. Mayr; J. Mannhart; M. Dressel; M. Grioni; P. Haas; S. Schuppler

arxiv: cond-mat/0103485 · v2 · submitted 2001-03-23 · ❄️ cond-mat.str-el

Extremely Small Energy Gap in the Quasi-One-Dimensional Conducting Chain Compound SrNbO_(3.41)

C. A. Kuntscher , S. Schuppler , P. Haas , B. Gorshunov , M. Dressel , M. Grioni , F. Lichtenberg , A. Herrnberger

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F. Mayr J. Mannhart

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keywords srnbochainconductingenergyextremelypropertiessmallalong

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Resistivity, optical, and angle-resolved photoemission experiments reveal unusual one-dimensional electronic properties of highly anisotropic SrNbO$_{3.41}$. Along the conducting chain direction we find an extremely small energy gap of only a few meV at the Fermi level. A discussion in terms of typical 1D instabilities (Peierls, Mott-Hubbard) shows that neither seems to provide a satisfactory explanation for the unique properties of SrNbO$_{3.41}$.

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Extremely Small Energy Gap in the Quasi-One-Dimensional Conducting Chain Compound SrNbO_(3.41)

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