Spin Defects in Spin-Peierls Systems

Abstract

We examine spin-Peierls systems in the presence of spin defects which are introduced by replacing magnetic ions $C{u}^{2+}$ with non-magnetic ones $Z{n}^{2+}$ in $CuGe{O}_3$. By using the action for the bosonized Hamiltonian, it is shown directly that the antiferromagnetic state induced by the spin defects coexists with the spin-Peierls states. Further the doping dependences of both transition temperature of spin-Peierls state and the spin gap have been calculated. The transition temperature of the present estimation shows good agreement quantitatively with that observed in $Cu_{1-\de} Zn_\de O_3$ for the region of the doping rate, $\de<0.02$.

jpsj style, 11 pages, 2 figures

References in corpus (2)

• Spin-Peierls and Antiferromagnetic Phases in Cu{1-x}Zn{x}GeO{3}: A Neutron Scattering Study
• Coexistence of antiferromagnetism and dimerization in a disordered spin-Peierls model: exact results

Cited by in corpus (2)

• Quantal phases, disorder effects and superconductivity in spin-Peierls systems
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