One-dimensional electronic properties of the Bechgaard salts

Penc, Karlo; Mila, Frédéric

doi:10.1051/jp4:1993231

Cited by 7 publications

(10 citation statements)

References 2 publications

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“…The results obtained for these 3 samples being qualitatively similar and we will present the data for two of them (referred as samples 1 and 2). an Arrhenius type behavior with an activation energy ∆ρ ≃ 300 K. The value of this activation energy is in good agreement with the evaluation of charge gap in [11]. It was shown that ∆ρ = 1/4(t 1 + t 2 ) which provide ∆ρ ≃ 300 K for (TMTTF) 2 PF 6 .…”

Section: Methodssupporting

confidence: 85%

“…The small cooling rate enables us to avoid cracks and to determine more accurately the energy gap magnitude which agrees with theoretical evaluation [11].…”

Section: Methodssupporting

confidence: 67%

“…As was shown in several of theoretical and experimental works, between many factors which determine the properties of (TMTTF) 2 X type salts, electron-electron correlation phenomena play the leading part [1,[4][5][6][7][8][9][10][11][12][13]. In this context two types of theoretical models have been essentially developed.…”

Section: Introductionmentioning

confidence: 99%

“…The second group of models includes the various versions of the Hubbard model [9][10][11][12][13]15].…”

Section: Introductionmentioning

confidence: 99%

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Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

et al. 2000

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Dear Editors,We would like to submit our manuscript entitled "Dielectric response of charge induced correlated state in quasi-one-dimensional conductor (TMTTF) 2 PF 6 " for publication in Phys. Rev. We previously submitted it to Phys. Rev. Lett. (code number LH7335).The delay for resubmission has been caused by difficulties in communication between coauthors, one at Moscow, another visiting Japan during several weeks. We would like, however, the original received date to be retained. The manuscript has been amended according to the referee comments as described below :Referee A 1) We modified our description of the extended Mott-Hubbard model for half-filled bands (bottom of page 2) taking into account both the on-site interaction (U) and the near-neighbor interaction (V).2) The 2k F lattice fluctuations coupled to the lattice are observed at much lower temperature (below 60 K) than the large increase of the dielectric permittivity. We have rewritten the beginning of the discussion part, page 6, to make this point more clear. Referee B1) These organic conductors are very fragile and cracks may reflect significant strain when the cooling rate is too fast and/or the sample holding too tight. We used all the care possible for avoiding cracks in our crystals and thus measuring bulk properties.2) There is no evidence in (TMTTF) 2 PF 6 of a structural phase transition affecting the main Bragg reflections. The tentative explanation of our data is the occurrence of a superstructure (4k F ) transition. Such a transition could be very likely detected from NMR experiments.Yours sincerely, P. MONCEAU C e n t r e d e R e c h e r c h e s s u r l e s T rè s B a s s e s T e m pé r a t u r e s laboratoire associéà l'Université Joseph Fourier

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Section: Methodssupporting

confidence: 85%

“…The small cooling rate enables us to avoid cracks and to determine more accurately the energy gap magnitude which agrees with theoretical evaluation [11].…”

Section: Methodssupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

“…The second group of models includes the various versions of the Hubbard model [9][10][11][12][13]15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

et al. 2000

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“…Thus the amplitude of the charge gap is closely connected to the dimerization and ⌬ Ϸ600 K for (TMTTF) 2 PF 6 . The charge gap is estimated 12 to be t a /2 in (TMTTF) 2 PF 6 but only t a /25 in (TMTSF) 2 PF 6 , where t a ϭ(t a 1 ϩt a 2 )/2 is the average transfer integral along the stacks. This gap enhancement is due to the increased Coulomb interaction and the increased dimerization.…”

Section: Introductionmentioning

confidence: 99%

Electron spin resonance studies on the organic linear-chain compounds(TMTCF)2X (C=S
Dumm
¹
,
Loidl
²
,
Fravel
³

et al. 2000
Phys. Rev. B
119
11
109
0
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temperature. In contrast to the selenium analogs TMTSF which are one-dimensional metals, the sulfur salts are semiconductors with localized spins on the TMTTF dimers. Taking into account the thermal expansion of the crystals at high temperature (TϾ20 K) the ESR intensity of all sulfur compounds can be described as a spin-1/2 antiferromagnetic Heisenberg chain with exchange constants 420рJ р500 K. Although the TMTSF compounds are one-dimensional organic metals down to 10 K, the temperature dependence of the spin susceptibility can also be described within the framework of the Hubbard model in the limit of strong Coulomb repulsion with JϷ1400 K. By modeling (TMTTF) 2 ClO 4 as an alternating spin chain, the change of the alternation parameter at the first-order phase transition (T AO ϭ72.5 K) indicates a tetramerization of the chain. (TMTTF) 2 PF 6 undergoes a spin-Peierls transition at T SP ϭ19 K which can be well described by Bulaevskii's model with a singlet-triplet gap ⌬ (0)ϭ32.3 K. We find evidence of antiferromagnetic fluctuations at temperatures well above the magnetic ordering in (TMTTF) 2 Br, (TMTSF) 2 PF 6 , and (TMTSF) 2 AsF 6 which follow the critical behavior expected for three-dimensional ordering. (TMTTF) 2 PF 6 and (TMTTF) 2 Br show one-dimensional lattice fluctuations.

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Quantum self-consistent approach to the charge gap of the quasi-one-dimensional organic conductors

Jiang

Guo

2004

Solid State Communications

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One-dimensional electronic properties of the Bechgaard salts

Cited by 7 publications

References 2 publications

Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

Electron spin resonance studies on the organic linear-chain compounds(TMTCF)2X (C=S
Dumm
¹
,
Loidl
²
,
Fravel
³

et al. 2000
Phys. Rev. B
119
11
109
0
View full text Add to dashboard Cite

Quantum self-consistent approach to the charge gap of the quasi-one-dimensional organic conductors

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One-dimensional electronic properties of the Bechgaard salts

Cited by 7 publications

References 2 publications

Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

Dielectric response of the charge-induced correlated state in the quasi-one-dimensional conductor(TMTTF)2PF6

Electron spin resonance studies on the organic linear-chain compounds(TMTCF)2X (C=SDumm1, Loidl2, Fravel3 et al. 2000Phys. Rev. B119111090View full textAdd to dashboardCite

Quantum self-consistent approach to the charge gap of the quasi-one-dimensional organic conductors

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Resources

About

Electron spin resonance studies on the organic linear-chain compounds(TMTCF)2X (C=S
Dumm
¹
,
Loidl
²
,
Fravel
³

et al. 2000
Phys. Rev. B
119
11
109
0
View full text Add to dashboard Cite