Kondo Effect in High-{ital T}{sub {ital c}} Cuprates
- Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
We study the Kondo effect due to the nonmagnetic impurity, e.g., Zn, in high-T{sub c} cuprates based on the spin-change separated state. In the optimal or overdoped case with the Kondo screening, the resistivity is given by {rho}(T)=(4{h_bar})/(e{sup 2} )(n{sub imp })/(1{minus}x)+({alpha}T)/(x) (x : hole concentration, n{sub imp} : impurity concentration, {alpha} : constant), which is in agreement with experiments. In the underdoped region with the pseudospin gap, an SU(2) formulation predicts that the holon phase shift is related to the formation of the local spin moment, and hence the residual resistivity is given by {rho}{sub res}=(4{h_bar})/(e{sup 2})(n{sub imp})/(x), which is also consistent with the experiments. The magnetic impurity case, e.g., Ni, is also discussed. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 554005
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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