Spin dynamics of the organic linear chain compounds (TMTTF)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mi>X</mml:mi></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:msub><mml:mi mathvariant="bold">SbF</mml:mi><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, AsF<mml:math

Salameh, B.; Yasin, S.; Dumm, M.; Untereiner, Gabriele; Montgomery, L. K.; Dressel, Martin

doi:10.1103/physrevb.83.205126

Cited by 36 publications

(39 citation statements)

References 39 publications

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“…The crystals were glued on the sample holder with their a-axis oriented along the microwave field (h mw ) direction which is the same as the sample-rotation direction (the static H being applied in the basal b ′ −c * plane with θ the angle between H and c * ). Above 30 K a single Lorentzian-shaped EPR line (main line) is observed, displaying an anisotropy of g factor, associated with different orientations of H. This anisotropy and the temperature dependence are typical of uniform quantum Heisenberg spin chains and was intensively studied in the past 16 Below about 30 K a second EPR line, a very sharp one, appears in the three systems at the same magnetic field as the main line. The integrated intensity of this sharp signal (SS) is much smaller (by a factor of 10 2 − 10 3 ) than the one of the main line, indicating its defect origin.…”

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confidence: 88%

Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

et al. 2014

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International audienceWe provide the first evidence for coherence and Rabi oscillations of spin-solitons pinned by the local breaking of translational symmetry in isotropic Heisenberg chains (simple antiferromagnetic-N\'{e}el or spin-Peierls).We show that these correlated spin systems made of hundreds of coupled spin bear an overall spin S=1/2 and can be manipulated as a single spin. This is clearly contrary to all known spin-qubits which are paramagnetic centres, highly diluted to prevent decoherence. These results offer an alternative approach for spin-qubits paving the way for the implementation of a new type of quantum computer

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Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

et al. 2014

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“…Except (TMTTF) 2 ClO 4 , all Fabre salts develop a charge-ordered phase below T < T CO , as can be seen by a kink in ρ(T ) [ Figure 2b] [7,37,38], nuclear magnetic resonance (NMR) [10,11,15,39], electron spin resonance (ESR) [35,40], dielectric [18,20,22], and optical measurements [41][42][43][44][45]. While the magnetic properties at ambient temperature can be described as an antiferromagnetic chain according to the S = 1/2 Heisenberg model, the systems either exhibit a transition to an antiferromagnetic ground state or to a spin-Peierls state at low temperatures (Table 1) [46][47][48]. Table 1.…”

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confidence: 99%

“…Table 1. Transition temperatures for charge localization T ρ and charge order T CO of various Fabre salts (TMTTF) 2 X. T SP indicates the spin-Peierls transition temperature and T N is the temperature of the antiferromagnetic ordering, determined by transport and magnetization measurements [37,46]. Charge order is supposed to be driven by the effective Coulomb repulsion V between neighboring molecules with respect to the bandwidth W = 2t.…”

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confidence: 99%

Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X

et al. 2012

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Charge ordering in the (TMTTF) 2 X salts with centrosymmetric anions (X = PF − 6 , AsF − 6 , SbF − 6 ) leads to a ferroelectric state around 100 K. For the first time and in great completeness, the intra-and intermolecular vibrational modes of (TMTTF) 2 X have been investigated by infrared and Raman spectroscopy as a function of temperature and pressure for different polarizations. In this original paper, we explore the development and amount of charge disproportionation and the coupling of the electronic degrees of freedom to the counterions and the underlying lattice. The methyl groups undergo changes with temperature that are crucial for the anion cage formed by them. We find that the coupling of the TMTTF molecules to the hexafluorine anions changes upon cooling and especially at the charge-order transition, indicating a distortion of the anion. Additional features are identified that are caused by the anharmonic potential. The spin-Peierls transition entails additional modifications in the charge distribution. To complete the discussion, we also add the vibrational frequencies and eigenvectors based on ab-initio quantum-chemical calculations.

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“…During the last years several comprehensive investigations have been conducted on the optical [5][6][7][8][9] and transport properties [10], the lattice [11,12] and electronic structure [13][14][15] as well as on the magnetic properties [16][17][18][19][20][21]. However, not much is known about the non-linear properties at the charge-order transition taking place at T CO = 157 K and transient conduction phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…The labels mark the charge-order transition temperature T CO = 67, 102, and 157 K, respectively. The inset demonstrates the effect of hydrostatic pressure on the transition by displaying the temperature-dependent dc resistivity of (TMTTF) 2 [16,38]. (c) The real part of the dielectric constant 1 maesured at f = 100 kHz as a function of temperature T reveals a Curie-law behavior [39].…”

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Light-Induced Current Oscillations in the Charge-Ordered State of (TMTTF)2SbF6

Peterseim¹,

Dressel²

2017

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Below T CO = 157 K the quasi-one-dimensional charge-transfer salt (TMTTF) 2 SbF 6 undergoes a pronounced phase transition to a charge-ordered ground state. We have explored the non-linear and photoconductive behavior as a function of applied voltage, laser pulse energy and temperature. Besides a decay of the photoconductive signal in a double exponential fashion in the millisecond range, we discover current oscillations in the kHz range induced by the application of short laser pulses. While the resonance frequencies do not depend on voltage or laser intensity and vary only slightly with temperature, the amplitude changes linearly with the laser intensity and voltage. The findings are discussed and compared to comparable phenomena in other low-dimensional electron systems.

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Spin dynamics of the organic linear chain compounds (TMTTF)2X(X=SbF6, AsF

Cited by 36 publications

References 39 publications

Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X

Light-Induced Current Oscillations in the Charge-Ordered State of (TMTTF)2SbF6

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