Hole Doping of the CuO2 Chains in (La, Sr, Ca)14Cu24O41

S. A. Carter, B. Batlogg, Robert Joseph Cava, J. J. Krajewski, W. F. Peck, T. M. Rice

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Abstract

Substantial hole doping has been achieved in (La, Sr, Ca)14Cu24O41 compounds with CuO2 chain and Cu2O3 ladder building blocks. Holes enter the structural units with larger O/Cu ratios which are the CuO2 chains. The ladders remain undoped and magnetically inert due to a large spin gap. The moments in the undoped chains interact weakly, and every hole added creates a nonmagnetic CuO2 unit and decreases the resistivity. At the maximum hole concentration [Formula presented] the residual moments form a singlet ground state possibly due to dimerization with an excitation gap of 140 K to the triplet state.

Original languageEnglish (US)
Pages (from-to)1378-1381
Number of pages4
JournalPhysical Review Letters
Volume77
Issue number7
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Carter, S. A., Batlogg, B., Cava, R. J., Krajewski, J. J., Peck, W. F., & Rice, T. M. (1996). Hole Doping of the CuO2 Chains in (La, Sr, Ca)14Cu24O41. Physical Review Letters, 77(7), 1378-1381. https://doi.org/10.1103/PhysRevLett.77.1378