Structural phase transition in quasi-one-dimensional conductors (BDTFP)2X(PhCl)0.5 (X = PF6 and AsF6) [BDTFP = 5,7-bis(1,3-dithiol-2-ylidene)-5,7-dihydrofuro[3,4-b]pyrazine; PhCl = chlorobenzene]

Uruichi, Mikio; Yakushi, Kyuya; Shirahata, Takashi; Takahashi, Kazuko; Mori, Takehiko; Nakamura, Toshikazu

doi:10.1039/b202259c

Cited by 3 publications

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References 9 publications

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“…63 A coupled SG-MI transition occurs at T MI =175 K in (BDTFP) 2 PF 6 (PhCl) 0.5 . 57 While structurally (BDTFP) 2 PF 6 (PhCl) 0.5 appears to be ladder-like, 18,57 X-ray 58 and optical measurements 59 show that in the low-temperature phase tetramerization takes place along the stacks with the SMWM bond pattern. 58 The coupled SG-MI transitions found in these two materials are consistent with our criterion above.…”

Section: Coupled Transitions: Intra-dimer Singlet Formationmentioning

confidence: 95%

Ground State and Finite Temperature Behavior of 1/4-Filled Band Zigzag Ladders

et al. 2012

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We consider the simplest example of lattice frustration in the 1 4 -filled band, a one-dimensional chain with next-nearest neighbor interactions. For this zigzag ladder with electron-electron as well as electron-phonon interactions we present numerical results for ground state as well as thermodynamic properties. In this system the ground state bond distortion pattern is independent of electron-electron interaction strength. The spin gap from the ground state of the zigzag ladder increases with the degree of frustration. Unlike in one-dimension, where the spin-gap and charge ordering transitions can be distinct, we show that in the ladder they occur simultaneously. We discuss spin gap and charge ordering transitions in 1 4 -filled materials with one, two, or three dimensional crystal structures. We show empirically that regardless of dimensionality the occurrence of simultaneous or distinct charge and magnetic transitions can be correlated with the ground state bond distortion pattern.

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