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- Title
Dynamics and distribution of doped holes in the CuO<sub>2</sub> plane of slightly doped antiferromagnetic YBa<sub>2</sub>(Cu<sub>1 − z</sub>Li<sub> z</sub>)<sub>3</sub>O<sub>6 + x</sub> ( x < 0.1) studied by Cu(1) NQR.
- Authors
Savinkov, A. V.; Dooglav, A. V.; Alloul, H.; Mendels, P.; Bobroff, J.; Collin, G.; Blanchard, N.
- Abstract
Incidence of doped holes in the CuO2 plane on the AF state was studied by Cu(1) nuclear quadrupole resonance (NQR) in slightly doped YBa2(Cu1 − zLi z)3O6 + x compounds. Inhomogeneous distribution of doped holes in the plane was detected in the low temperature measurements of transverse (1/ T2) and longitudinal (1/ T1) relaxation rates. We establish that at lower T the holes motion slows down and we estimate that the holes localize finally in restricted regions (∼3 lattice constants) in the Coulomb potential of the Li+ ions. Also we compared the hole behavior in slightly doped YBa2(Cu1 − zLi z)3O6 + x samples with that in slightly doped Y1 − yCa yBa2Cu3O6. A stronger trapping potential of the in-plane Li+ impurities was concluded as compared to slightly doped Y1 − yCa yBa2Cu3O6 compound with out-of-plane Ca2+ impurities.
- Subjects
NUCLEAR quadrupole resonance; ANTIFERROMAGNETISM; COULOMB potential; PROPERTIES of matter; ELECTRIC fields
- Publication
JETP Letters, 2010, Vol 91, Issue 2, p83
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364010020074