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Proceedings Paper

Quantum spin fluctuations in quasi-one-dimensional chlorine-bridged platinum complexes
Author(s): Xing Wei; Robert J. Donohoe; Wen Zheng Wang; Alan R. Bishop; Jan Tinka Gammel
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Paper Abstract

We report experimental and theoretical studies of spin dynamic process in the quasi-one-dimensional chlorine- bridged platinum complex, [PtII(en)2][PtIV(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.

Paper Details

Date Published: 1 December 1997
PDF: 10 pages
Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); doi: 10.1117/12.279272
Show Author Affiliations
Xing Wei, Los Alamos National Lab. (United States)
Robert J. Donohoe, Los Alamos National Lab. (United States)
Wen Zheng Wang, Los Alamos National Lab. (United States)
Alan R. Bishop, Los Alamos National Lab. (United States)
Jan Tinka Gammel, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 3145:
Optical Probes of Conjugated Polymers
Z. Valy Vardeny; Lewis J. Rothberg, Editor(s)

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