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Figure 5
(a) Temperature dependence of the spin susceptibility, χs, in (o-Me2TTF)2NO3. A Curie tail encompassing 0.65% S = ½ magnetic defaults has been subtracted. The dotted line is an HT fit to the uniform spin ½ AF Heisenberg chain. (b) Plot of ln(χsT) versus 1/T, allowing the determination of the spin activation energy Δσ ≃ 390 K in the spin-Peierls ground state.

Volume 5| Part 3| May 2018| Pages 361-372
ISSN: 2052-2525