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- Title
COPPER SITE NUCLEAR SPIN RELAXATION ANOMALY AND THE KNIGHT SHIFT.
- Authors
WEI GUO; LIKUN WANG; RUSHAN HAN
- Abstract
In the low doping limit, a high Tc cuprate preserves a two band structure. O2p electrons are itinerant, Cu3d electrons are localized. Therefore the two component model is suitable to describe nuclear spin relaxation at copper sites. In addition to the Korringa process, the hyperfine interaction between nuclear spins and local electron spins is considered, which gives rise to the anomalous relaxation rate 1/T1 = a + bT. The decrease of the susceptibility near Tc, as shown by the Knight shift measurements, can be attributed to the ordering of local spins and the pairing of the uncompensated spins created by holes at the oxygen sites.
- Subjects
COPPER; KNIGHT shift; NUCLEAR magnetic resonance; NUCLEAR magnetic resonance spectroscopy; ELECTRONS; PARTICLES (Nuclear physics)
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2007, Vol 21, Issue 18/19, p3143
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979207044044