Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO_3 under pressure

A. Revcolevschi (Univ. Paris-Sud); B. B\"uchner; G. Dhalenne; G. G\"untherodt (RWTH-Aachen); G. Martinez (GHMFL; Grenoble); J. Zeman; M. Breuer (Univ. zu K\"oln); M. Fischer; P.H.M. van Loosdrecht

arxiv: cond-mat/9712136 · v1 · submitted 1997-12-12 · ❄️ cond-mat.str-el

Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO₃ under pressure

M. Fischer , P.H.M. van Loosdrecht , P. Lemmens , G. G\"untherodt (RWTH-Aachen) , B. B\"uchner , T. Lorenz , M. Breuer (Univ. zu K\"oln) , J. Zeman

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G. Martinez (GHMFL Grenoble) G. Dhalenne A. Revcolevschi (Univ. Paris-Sud)

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keywords pressurelargespin-peierlstemperaturetransitionalmostapplyingarising

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Pressure and temperature dependent susceptibility and Raman scattering experiments on single crystalline Cu_xZn_(1-x)GeO_3 have shown an unusually strong increase of the spin-Peierls phase transition temperature upon applying hydrostatic pressure. The large positive pressure coefficient (7.5 K/GPa) - almost twice as large as for the pure compound (4.5 K/GPa) - is interpreted as arising due to an increasing magnetic frustration which decreases the spin-spin correlation length, and thereby weakens the influence of the non-magnetic Zn-substitution.

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Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO₃ under pressure

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