Extremely small energy gap in the quasi-one-dimensional conducting chain compound SrNbO3.41.
Resistivity, optical, and angle-resolved photoemission experiments reveal unusual one-dimensional electronic properties of highly anisotropic SrNbO3.41. 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 SrNbO3.41.
Kuntscher
C A
CA
Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany.
Schuppler
S
S
Haas
P
P
Gorshunov
B
B
Dressel
M
M
Grioni
M
M
Lichtenberg
F
F
Herrnberger
A
A
Mayr
F
F
Mannhart
J
J