Magnetic Instabilities in TMTTF Salts

Maaroufi, A.; Flandrois, S.; Fillion, G.; Morand, J.P.

doi:10.1080/00268948508075177

Cited by 18 publications

(11 citation statements)

References 10 publications

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“…The ratio of the charge separation estimated by 13 C NMR is about 3 : 1 [43]. The ground state at ambient pressure of (TMTTF) 2 SbF 6 is an AF (T AF ∼7.5 K) [44,45]. The striking observation of the AF phase rather than the sP phase at ambient pressure has cast doubt on the assumption that the dimensionality of the system increases with increasing pressure [4,37].…”

Section: Introductionmentioning

confidence: 99%

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

Iwase,

Sugiura,

Furukawa

et al. 2011

Preprint

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Magnetic properties in the quasi-one-dimensional organic salt (TMTTF)2SbF6 are investigated by 13 C NMR under pressures. Antiferromagnetic phase transition at ambient pressure (AFI) is confirmed. Charge-ordering is suppressed by pressure and is not observed under 8 kbar. For 5 < P < 20 kbar, a sharp spectrum and the rapid decrease of the spin-lattice relaxation rate 1/T1 were observed below about 4 K, attributed to a spin-gap transition. Above 20 kbar, extremely broadened spectrum and critical increase of 1/T1 were observed. This indicates that the system enters into another antiferromagnetic phase (AFII) under pressure. The slope of the antiferromagnetic phase transition temperature TAFII, dTAFII/dP , is positive, while TAFI decreases with pressure. The magnetic moment is weakly incommensurate with the lattice at 30 kbar.

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Section: Introductionmentioning

confidence: 99%

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

Iwase,

Sugiura,

Furukawa

et al. 2011

Preprint

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“…Quasi one-dimensional compounds can display a rich variety of phases, including spin-Peierls, charge density wave, spin density wave, and superconducting orders 1,2,3,4,5 . Due to the large anisotropy in their crystal structure, these materials are often modelled as a collection of weakly coupled Luttinger liquids.…”

Section: Introductionmentioning

confidence: 99%

“…33 The unification approach based on higher symmetries has been generalized to several other types of competing states. SO (5) and SO (8) symmetries have been used to classify possible many-body ground states in electronic ladders. 34,35 SO(6) symmetry has been introduced to discuss competing striped phases and superconductivity in the cuprates 36 SO(4) symmetry has been used to combine s-wave superconductivity and charge density wave orders in the negative U Hubbard model, 37,38 as well as d-wave superconductivity and d-density wave phases.…”

Section: Introductionmentioning

confidence: 99%

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Competition between triplet superconductivity and antiferromagnetism in quasi-one-dimensional electron systems

Podolsky¹,

Altman²,

Rostunov³

et al. 2004

Phys. Rev. B

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We investigate the competition between antiferromagnetism and triplet superconductivity in quasi-onedimensional electron systems. We show that the two order parameters can be unified using a SO(4) symmetry and demonstrate the existence of such symmetry in one-dimensional Luttinger liquids of interacting electrons. We argue that approximate SO(4) symmetry remains valid even when interchain hopping is strong enough to turn the system into a strongly anisotropic Fermi liquid. For unitary triplet superconductors SO(4) symmetry requires a first order transition between antiferromagnetic and superconducting phases. Analysis of thermal fluctuations shows that the transition between the normal and the superconducting phases is weakly first order, and the normal to antiferromagnet phase boundary has a tricritical point, with the transition being first order in the vicinity of the superconducting phase. We propose that this phase diagram explains coexistence regions between the superconducting and the antiferromagnetic phases, and between the antiferromagnetic and the normal phases observed in ͑TMTSF͒ 2 PF 6 . For nonunitary triplet superconductors the SO(4) symmetry predicts the existence of a mixed phase of antiferromagnetism and superconductivity. We discuss experimental tests of the SO(4) symmetry in neutron scattering and tunneling experiments.

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“…The ground state of SbF 6 salt is an antiferromagnetic at ambient pressure [3]. In contrast, AsF 6 salt, which is located at higher pressure region than SbF 6 salt, shows a spin-Peierls transition [4]. These two salts undergo the charge-ordering (CO) transition at higher temperatures [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

¹³C NMR study of the chemical pressure effect in (TMTTF)₂[(AsF₆)_x(SbF₆)_1-x] (x∼ 0.5)

Iwase

Sugiura

Furukawa

et al. 2008

J. Phys.: Conf. Ser.

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Magnetic Instabilities in TMTTF Salts

Cited by 18 publications

References 10 publications

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

Competition between triplet superconductivity and antiferromagnetism in quasi-one-dimensional electron systems

¹³C NMR study of the chemical pressure effect in (TMTTF)₂[(AsF₆)_x(SbF₆)_1-x] (x∼ 0.5)

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Magnetic Instabilities in TMTTF Salts

Cited by 18 publications

References 10 publications

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

13C NMR study of the magnetic properties of the quasi-one-dimensional conductor, (TMTTF)2SbF6

Competition between triplet superconductivity and antiferromagnetism in quasi-one-dimensional electron systems

13C NMR study of the chemical pressure effect in (TMTTF)2[(AsF6)x(SbF6)1-x] (x∼ 0.5)

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¹³C NMR study of the chemical pressure effect in (TMTTF)₂[(AsF₆)_x(SbF₆)_1-x] (x∼ 0.5)