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SDW phase of (EDT-TTF)_2AuBr_2

机译:(EDT-TTF)_2AuBr_2的SDW阶段

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The low temperature phase in (EDT-TTF)_2AuBr_2 was investigated by ~1H NMR and magnetic susceptibility measurements for protonated and partially deuterated single crystals. Two sharp peaks were observed in the temperature dependence of T~(-1)_1 for both salts, associated with the SDW transition TSDW and the sub-phase transition T* common in the incommensurate SDW phase. The values of TSDW determined as 15 and 19K for h- and d-salts, respectively, indicate the negative chemical pressure effect. The obtained ratios T*/T_(SDW) 0.37 and 0.43 for h- and d-salts, respectively, are slightly larger than the common value T*/T_(SDW) velence 0.3 observed in (TMTCF)_2X. The ratio T*/T_(SDW) increases for larger T_(SDW) and the low temperature sub-phase becomes more stable.
机译:(EDT-TTF)_2AuBr_2中的低温相通过〜1H NMR和磁化率测量研究了质子化和部分氘化的单晶。对于两种盐,在T〜(-1)_1的温度依赖性中观察到两个尖峰,这与SDW相变TSDW和不相称SDW相中常见的亚相转变T *有关。确定的h-盐和d-盐的TSDW值分别为15和19K,表示负化学压力效应。对于h盐和d盐,分别获得的比率T * / T_(SDW)0.37和0.43略大于(TMTCF)_2X中观察到的公共值T * / T_(SDW)velence 0.3。对于较大的T_(SDW),比率T * / T_(SDW)增加,并且低温子相变得更稳定。

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