Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-01-09
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 6 figures
Scientific paper
10.1103/PhysRevB.69.184414
The Haldane gap material NENP exhibits anomalies in its Knight shift, far infrared absorption and field-dependent gaps, which have been explained using the staggered $g$-tensor that occurs due to the low crystal symmetry. We point out that the low-temperature susceptibility is also anomalous and that a consistent interpretation of all data may require consideration of the Dzyaloshinskii-Moriya interaction.
Affleck Ian
Huang Haifeng
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