<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>13</mml:mn></mml:msup></mml:math>C NMR study of the magnetic properties of the quasi-one-dimensional conductor (TMTTF)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>SbF<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>6</mml:mn></mml:msub></mml:math>

Iwase, Fumitatsu; Sugiura, Koichi; Furukawa, Ko; Nakamura, Toshikazu

doi:10.1103/physrevb.84.115140

Cited by 24 publications

(37 citation statements)

References 61 publications

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“…This splitting in spectra is caused by the charge disproportionation of CO and this change is consistent with the previous NMR measurement. 14 As temperature decreased, the NMR shift of four peaks slightly increased and the broadening of two peaks at around −50 ppm and 43 ppm seem to be observed below 26 K. Fig. 2(a), respectively.…”

Section: Resultsmentioning

confidence: 86%

“…For example, ρ of (TMTTF) 2 AsF 6 , which exhibits sP transition at 14 K, is estimated to 0.21e and 0.16e by infrared spectroscopy of two groups, 11,12 0.50e and 0.33e, which are estimated values at lowest temperature from the temperature-dependent ratio of spin-lattice relaxation rate T −1 1 , by the NMR measurements of two groups. 13,14 It should be also noted that a slight decrease 11 or the constant value 12 of ρ is reported when it enters the sP state, whereas the NMR study suggested that the charge separation is diminished in the sP phase. 14 In the (TMTTF) 2 SbF 6 salt, ρ is estimated to 0.29e, which is almost temperature independent, by infrared spectroscopy, 15 0.50e, and 0.55e by the NMR T −1 1 measurements of two groups.…”

Section: Introductionmentioning

confidence: 88%

“…13,14 It should be also noted that a slight decrease 11 or the constant value 12 of ρ is reported when it enters the sP state, whereas the NMR study suggested that the charge separation is diminished in the sP phase. 14 In the (TMTTF) 2 SbF 6 salt, ρ is estimated to 0.29e, which is almost temperature independent, by infrared spectroscopy, 15 0.50e, and 0.55e by the NMR T −1 1 measurements of two groups. 13,14 Below 6 K, the AF phase has been reported from the antiferromagnetic resonance 16 and NMR 2,17 measurements.…”

Section: Introductionmentioning

confidence: 88%

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Charge ordering and antiferromagnetism in (TMTTF)2SbF6

et al. 2013

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Carbon-13 nuclear magnetic resonance ( 13 C NMR) measurements have been carried out in the quasione-dimensional organic conductor (TMTTF) 2 SbF 6 , which exhibits charge ordering (CO) transition and antiferromagnetic (AF) transition at 157 K and 6 K at ambient pressure, respectively. We estimated the degree of charge disproportionation, ρ = ρ rich − ρ poor , in the CO state to be 0.25e from the analysis of the NMR shift and found the broadening of the NMR spectral peaks caused by the inhomogeneous distribution in association with the AF fluctuation at charge rich site below 20 K in the CO state. Moreover, we determined the magnetic structure with two kinds of staggered moments in the AF phase of (TMTTF) 2 SbF 6 , which suggests that the CO state remains even in the AF phase. Consequently, we found the difference between two AF phases appearing on both sides of the spin-Peierls phase in the universal P -T phase diagram.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 88%

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Charge ordering and antiferromagnetism in (TMTTF)2SbF6

et al. 2013

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“…6), a long-range SP ground state is not observed in pressurized (TMTTF) 2 SbF 6 as it is the case in the PF 6 and AsF 6 salts at ambient pressure. At higher pressure, however, the AF ground state is recovered in the SbF 6 salt 75 . All these results demonstrate that some caution must be taken in the use of the generic phase diagram which ignores the specificity of the anions.…”

Section: B the Symmetry Breaking Co Transitionmentioning

confidence: 95%

“…10), a pressure of roughly 5 kbar is necessary to abruptly suppress the CO phase. At low temperatures, pressure destroys the AF ordering giving rise to the formation of local SP-like magnetic singlets 46 together with spin-liquid like fluctuations 75 . Contrary to the expectation of the generic phase diagram (Fig.…”

Section: B the Symmetry Breaking Co Transitionmentioning

confidence: 99%

Charge-ordering transition in (TMTTF)₂X explored via dilatometry

Souza¹,

Pouget

2013

J. Phys.: Condens. Matter

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Charge-ordering phenomena have been highly topical over the last few years. A phase transition towards a charge ordered state has been observed experimentally in several classes of materials. Among them, many studies have been devoted to the family of quasi-one dimensional organic chargetransfer salts (TMTTF)2X, where (TMTTF) stands for tetramethyltetrathiafulvalene and X for a monovalent anion (X = PF6, AsF6 and SbF6). However, the relationship between the electron localization phenomena and the role of the lattice distortion in stabilizing the charge-ordering pattern is poorly documented in the literature. Here we present a brief overview of selected literature results with emphasis placed on recent thermal expansion experiments probing the charge-ordering transition of these salts.

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