Journal
PHYSICAL REVIEW B
Volume 80, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.115118
Keywords
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Funding
- U.S. Department of Energy [DE-AC36-08GO28308]
- National Energy Research Scientific Computing Center
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An unconventional spin-Peierls-type distortion was found in a nonmagnetic atom N doped pseudo-one-dimensional WO3 system. The periodicity of the initial ferromagnetic WO3 : N is doubled in one direction, and the band gap opens up due to this distortion. The magnetic moment at the N site is asymmetric in the distorted system, and the interaction between the localized spin is very weak. We show that the large exchange interaction of the nitrogen 2p atomic orbital and the pseudo-one-dimensional W-O-W chain in monoclinic WO3 structure is the origin of this spin-Peierls-like transition that leads to the stabilization of an unusual negative-U charge-ordered system.
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