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Theoretical study of the structural dependence of nuclear quadrupole frequencies in high-T_c superconductors

Garcia, Martin E.
Bennemann, K. H.

The remarkable difference between the nuclear quadrupole frequencies v_Q of Cu(1) and Cu(2) in YBa_2Cu_3O_6 and YBa_2Cu_3O_7 is analyzed. We calculate the ionic contribution to the electric field gradients and estimate, by using experimental results for Cu_2O and La_2CuO_4, the contribution of the d valence electrons. Thus, we determine v_Q1, v_Q2, and the asymmetry parameter η for YBa_2Cu_3O_6 and YBa_2Cu_3O_7. The number of holes in dthe Cu-O planes and chains is found to be important for the different behavior of v_Q1 and v_Q2.

Collections
@article{urn:nbn:de:hebis:34-2008062022141,
  author    ={Garcia, Martin E. and Bennemann, K. H.},
  title    ={Theoretical study of the structural dependence of nuclear quadrupole frequencies in high-T_c superconductors},
  copyright  ={https://rightsstatements.org/page/InC/1.0/},
  language ={en},
  year   ={1989}
}