2006
DOI: 10.1021/ja057307o
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Checkerboard-Type Charge-Ordered State of a Pressure-Induced Superconductor, β-(meso-DMBEDT-TTF)2PF6

Abstract: To investigate the insulating state of the pressure-induced superconductor, beta-(meso-DMBEDT-TTF)2PF6, we have carried out X-ray analysis at 11.5 K. In an asymmetric unit, there exist two crystallographically independent donor molecules, caused by charge separation. In the column structure, the arrangement of the charge-rich (r) and -poor (p) donor molecules is as rrpprrpp, which affords "checkerboard"-type charge ordering.

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Cited by 60 publications
(54 citation statements)
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“…We further note that the charge order is known to be vulnerable to impurities [46], while the charge density wave is more or less robust against impurities [47]. A similar type of the phase transition occurs in the organic salt β-(meso-DMBEDT-TTF) 2 PF 6 [48]. Many conductive organic salts with a chemical formula of A 2 B consists of a dimer molecule of A 2 as a composition unit.…”
Section: And κ-(Bedt-ttf)cu[n(cn)mentioning
confidence: 65%
“…We further note that the charge order is known to be vulnerable to impurities [46], while the charge density wave is more or less robust against impurities [47]. A similar type of the phase transition occurs in the organic salt β-(meso-DMBEDT-TTF) 2 PF 6 [48]. Many conductive organic salts with a chemical formula of A 2 B consists of a dimer molecule of A 2 as a composition unit.…”
Section: And κ-(Bedt-ttf)cu[n(cn)mentioning
confidence: 65%
“…The distinct metal-insulator transition occurs at 75 K, where the checkerboard-type charge ordering (CO) appears by accompanying the lattice distortion [5,6]. The charge disproportionation was also confirmed to be D [D = meso-DMBEDT-TTF] by IR and Raman spectroscopy [9].…”
Section: Most Molecular Charge Transfer (Ct) Complexes Have [(Donor) 2 ]mentioning
confidence: 96%
“…In order to obtain a variety of electronic states, the correlation parameters have been changed systematically by modifying the BEDT-TTF molecule. As a result, BEDT-TTF derivatives and their charge transfer complexes have been synthesized and prepared, and their physical properties have been investigated [3][4][5][6][7][8][9].…”
Section: Most Molecular Charge Transfer (Ct) Complexes Have [(Donor) 2 ]mentioning
confidence: 99%
“…(iii) β-(meso-DMET) 2 PF 6 : This 2D CTS exhibits a pressure-induced transition from CO to SC 74,75 . While the charge order pattern in this CTS is referred to as "checkerboard" by the authors, the checkerboard pattern refers to meso-DMET dimers as units.…”
Section: Cts With Pec Insulating Statesmentioning
confidence: 99%