Quantum spin fluctuations in quasi-one-dimensional chlorine-bridged platinum complexes

Xing Wei; Robert J. Donohoe; Wen Zheng Wang; Alan R. Bishop; Jan Tinka Gammel

doi:10.1117/12.279272

1 December 1997 Quantum spin fluctuations in quasi-one-dimensional chlorine-bridged platinum complexes

Xing Wei, Robert J. Donohoe, Wen Zheng Wang, Alan R. Bishop, Jan Tinka Gammel

Proceedings Volume 3145, Optical Probes of Conjugated Polymers; (1997) https://doi.org/10.1117/12.279272
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We report experimental and theoretical studies of spin dynamic process in the quasi-one-dimensional chlorine- bridged platinum complex, [Pt^II(en)2][Pt^IV(en)₂Cl₂](ClO₄)₄, where en equals ethylenediamine, C₂N₂H₈. The process manifests itself in collapsing of the hyperfine and superhyperfine structures in the electron spin resonance spectrum and non-statistical distribution of spectral weight of the Pt isotopes. More surprisingly, it is activated only at temperatures below 6 K. We interpret the phenomenon in terms of quantum tunneling of the electronic spin in a strong electron-electron and electron-phonon coupling regime. This is modeled using a non-adiabatic many-body approach, in which polarons and solitons represent local spin-Peierls regions in a strongly disproportional charge- density-wave background and display intriguing spin-charge separation in the form of pinned charge and tunneling spin fluctuations.

Citation Download Citation

Xing Wei, Robert J. Donohoe, Wen Zheng Wang, Alan R. Bishop, and Jan Tinka Gammel "Quantum spin fluctuations in quasi-one-dimensional chlorine-bridged platinum complexes", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); https://doi.org/10.1117/12.279272

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