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首页> 外文期刊>Physical review >Ground states and the critical behavior in the quasi-one-dimensional complexes (TMTTF)_2[(AsF_6)_x(SbF_6)_(1-x)]
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Ground states and the critical behavior in the quasi-one-dimensional complexes (TMTTF)_2[(AsF_6)_x(SbF_6)_(1-x)]

机译:准一维复合物(TMTTF)_2 [(AsF_6)_x(SbF_6)_(1-x)]的基态和临界行为

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摘要

~(13)C NMR measurements were carried out to understand the chemical pressure effect on the ground state in quasi-one-dimensional (1D) organic complexes using the alloy system (TMTTF)_2[(AsF_6)_x(SbF_6)_(1-x)] (x~ 0.3,0.5,0.67). The temperature of the charge-ordering transition decreases with the concentration of AsF_6. Additional line splitting and the rapid increase in the spin-lattice relaxation rate, 1 / T_1, on cooling for the salt of x~0.3 indicates that the ground state of the salt is antiferromagnetic. In the x~0.67 alloy, the spin gap opens without antiferromagnetic spin correlations. The intermediate salt of x~0.5 is located in the vicinity of the quantum critical region between two phases at low temperatures. The quasi-1D correlation and antiferromagnetic critical behavior are discussed in terms of the power-law behavior of 1 / T_1.
机译:使用合金体系(TMTTF)_2 [(AsF_6)_x(SbF_6)_(1)进行〜(13)C NMR测量,以了解化学压力对准一维(1D)有机配合物中基态的影响。 -x)](x〜0.3,0.5,0.67)。电荷有序转变的温度随着AsF_6的浓度而降低。 x〜0.3的盐在冷却时,额外的线分裂和自旋晶格弛豫速率的快速增加(1 / T_1)表明盐的基态是反铁磁性的。在x〜0.67合金中,自旋间隙打开而没有反铁磁自旋相关性。 x〜0.5的中间盐在低温下位于两相之间的量子临界区附近。根据1 / T_1的幂律行为,讨论了准一维相关性和反铁磁临界行为。

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