Electron Spin Resonance of Defects in Spin Chains—$$\hbox {o}-(\hbox {DMTTF})_2\hbox {X}$$: A Versatile System Behaving Like Molecular Magnet

Soriano, L.; Zeisner, J.; Kataev, V.; Pilone, O.; Fourmigué, Marc; Jeannin, Olivier; Vezin, Hervé; Orio, Maylis; Bertaina, Sylvain

doi:10.1007/s00723-020-01245-7

Cited by 3 publications

(12 citation statements)

References 55 publications

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“…( 3) with α(δ) replaced by α, which is now a free parameter independent of δ, while ∆ B (δ) remains a function of δ. It is clear that this model is incorrect and should not be used but it was applied in the past to extract the dimerization parameter of spin-Peierls systems [12,43,57] and had certainly provided an overestimated δ as we will se in the following. The fit labeled "Bulaevski" is eq.…”

Section: Dimerization Of the Spin Chainmentioning

confidence: 99%

“…However in the section III A we have shown the existence of a weak signal corresponding to some 10 −4 .at −1 impurities. One of the strengths of ESR is the possibility to separate the magnetic contribution (extrinsic or intrinsic) and it was shown in previous studies [12][13][14] that the ESR signal observed at very low temperature comes from spin chain defects. By itself, the defect is nonmagnetic and is a break in the transnational symmetry like a chain-end or a stacking fault of the alternation parameter.…”

Section: B Electronic Interactionmentioning

confidence: 99%

“…In this paper we present an ESR investigation of (o -DMTTF) 2 X with X=Cl, Br and I from room temperature down to T = 5 K. ESR measurements on these systems have been reported [12,14], but with a weak density of data points and, as we will explain in the following, an incorrect analysis of the gap. First, in Sec.…”

Section: Introductionmentioning

confidence: 95%

“…As a consequence of this many-body spin- 1 2 soliton formation, the ground state is a doublet separated from the quasicontinnum by a gap [9]. Such a structure is of particular interest because its energy levels are comparable to single molecular magnet SMM like V15 [10][11][12] with unconventional quantum coherence properties [13,14] which make it an interesting potential qubit [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover electron spin echo of the pined soliton has been reported [14]. (o -DMTTF) 2 X was first synthesized many decades ago [25] but intensive studies have been published recently [26] with the construction of the phase diagram [27,28], the solid solution with different counter anion [29] and the ESR study [12,14] The three systems (o -DMTTF) 2 X crystallize in the same space group I 42d (no. 122) with cell parameters a = b = 16.93 Å, 17.09 Å, 17.40 Å and c = 7.040 Å, 7.058 Å, 7.098 Å for (o -DMTTF) 2 Cl, (o -DMTTF) 2 Br and (o -DMTTF) 2 I respectively.…”

Section: Introductionmentioning

confidence: 99%

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Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

et al. 2022

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We investigate the electron spin resonance of the organic spin-Peierls chain (o -DMTTF)2X with X = Cl, Br and I. We describe the temperature dependence of the spin gap during the phase transition and quantify the dimerization parameter δ. At the lowest temperatures, the susceptibility is governed by defects in the spin dimerized chain. Such strongly correlated defects are the consequence of breaks in the translational symmetry of the chain. In the vicinity of the defects the spins are polarized antiferomagnetically forming a magnetic soliton: a spin 1 2 quasi-particle of size ruled by δ pinned to the defects. For (o -DMTTF)2Br and (o -DMTTF)2Cl, we show that the one-half of the total number of solitons are in isolation (as singles) whereas the other half form pairs (soliton dimers)with a strong magnetic coupling. The Rabi oscillations of both the single-soliton and the soliton-dimer are observed, which is a prerequisite in the context of quantum information.

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Section: Dimerization Of the Spin Chainmentioning

confidence: 99%

Section: B Electronic Interactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

et al. 2022

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A tetrathiafulvalene salt of the nitrite (NO₂⁻) anion: investigations of the spin-Peierls phase

et al. 2023

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Spin-Peierls, Spin-Ladder and Kondo Coupling in Weakly Localized Quasi-1D Molecular Systems: An Overview

Pouget

2023

Magnetochemistry

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We review the magneto-structural properties of electron–electron correlated quasi-one- dimensional (1D) molecular organics. These weakly localized quarter-filled metallic-like systems with pronounced spin 1/2 antiferromagnetic (AF) interactions in stack direction exhibit a spin charge decoupling where magnetoelastic coupling picks up spin 1/2 to pair into S = 0 singlet dimers. This is well illustrated by the observation of a spin-Peierls (SP) instability in the (TMTTF)2X Fabre salts and related salts with the o-DMTTF donor. These instabilities are revealed by the formation of a pseudo-gap in the spin degrees of freedom triggered by the development of SP structural correlations. The divergence of these 1D fluctuations, together with the interchain coupling, drive a 3D-SP ground state. More surprisingly, we show that the Per2-M(mnt)2 system, undergoing a Kondo coupling between the metallic Per stack and the dithiolate stack of localized AF coupled spin ½ (for M = Pd, Ni, Pt), enhances the SP instability. Then, we consider the zig-zag spin ladder DTTTF2-M(mnt)2 system, where unusual singlet ground state properties are due to a combination of a 4kF charge localization effect in stack direction and a 2kF SP instability along the zig-zag ladder. Finally, we consider some specific features of correlated 1D systems concerning the coexistence of symmetrically different 4kF BOW and 4kF CDW orders in quarter-filled organics, and the nucleation of solitons in perturbed SP systems.

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Electron Spin Resonance of Defects in Spin Chains—$$\hbox {o}-(\hbox {DMTTF})_2\hbox {X}$$: A Versatile System Behaving Like Molecular Magnet

Cited by 3 publications

References 55 publications

Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

A tetrathiafulvalene salt of the nitrite (NO₂⁻) anion: investigations of the spin-Peierls phase

Spin-Peierls, Spin-Ladder and Kondo Coupling in Weakly Localized Quasi-1D Molecular Systems: An Overview

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Electron Spin Resonance of Defects in Spin Chains—$$\hbox {o}-(\hbox {DMTTF})_2\hbox {X}$$: A Versatile System Behaving Like Molecular Magnet

Cited by 3 publications

References 55 publications

Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

Electron-spin interaction in the spin-Peierls phase of the organic spin chain ( o -DMTTF) 2X ( X =Cl, Br, I)

A tetrathiafulvalene salt of the nitrite (NO2−) anion: investigations of the spin-Peierls phase

Spin-Peierls, Spin-Ladder and Kondo Coupling in Weakly Localized Quasi-1D Molecular Systems: An Overview

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A tetrathiafulvalene salt of the nitrite (NO₂⁻) anion: investigations of the spin-Peierls phase