Acoustic and magnetic anomalies near the saturation field of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn><mml:mn /></mml:math>antiferromagnetic Heisenberg chain studied on a Cu(II) coordination polymer

Wolf, B.; Жерлицын, С.; Lüthi, B.; Harrison, N.; Löw, U.; Pashchenko, V. A.; Lang, Michael; Margraf, Günter; Lerner, Hans‐Wolfram; Dahlmann, E.; Ritter, Franz; Aßmus, W.

doi:10.1103/physrevb.69.092403

Cited by 25 publications

(28 citation statements)

References 10 publications

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“…Irrespective of these shortcomings, the fit allows for an order-of magnitude estimate of the magnetoelastic coupling constant |G| to about 3650 K. Although this number involves significant uncertainties, there is no doubt that it has to be of exceptionally large size to account for the observed softening in c 22 of approximately 5%. This effect not only exceeds corresponding anomalies typically revealed for low-dimensional quantum spin systems [33,34] by one to two orders of magnitude; it even exceeds the huge effects found for the longitudinal mode in the coupled-dimer system SrCu 2 (BO 3 ) 2 [35]. The large |G| value reflects an unusually high sensitivity of the dominant energy scale in azurite against the application of uniaxial strain.…”

Section: Resultsmentioning

confidence: 57%

Magnetoelastic couplings in the distorted diamond-chain compound azurite

et al. 2014

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We present results of ultrasonic measurements on a single crystal of the distorted diamond-chain compound azurite Cu 3 (CO 3 ) 2 (OH) 2 . Pronounced elastic anomalies are observed in the temperature dependence of the longitudinal elastic mode c 22 which can be assigned to the relevant magnetic interactions in the system and their couplings to the lattice degrees of freedom. From a semiquantitative analysis of the magnetic contribution to c 22 the magnetoelastic coupling G = ∂J 2 /∂ b can be estimated, where J 2 is the intradimer coupling constant and b the strain along the intrachain b axis. We find an exceptionally large coupling constant of |G| ∼ 3650 K highlighting an extraordinarily strong sensitivity of J 2 against changes of the b-axis lattice parameter. These results are complemented by measurements of the hydrostatic pressure dependence of J 2 by means of thermal expansion and magnetic susceptibility measurements performed both at ambient and finite hydrostatic pressure. We propose that a structural peculiarity of this compound, in which Cu 2 O 6 dimer units are incorporated in an unusually stretched manner, is responsible for the anomalously large magnetoelastic coupling.

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Section: Resultsmentioning

confidence: 57%

Magnetoelastic couplings in the distorted diamond-chain compound azurite

et al. 2014

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“…According to our results, CuCPP represents an ideal model system for exploring the physical properties of a 1-D isotropic S = 1/2 Heisenberg antiferromagnet with a coupling constant of J/k B = 21.5 K [6]. Powder obtained earlier had a poor crystallinity.…”

Section: Introductionmentioning

confidence: 86%

Crystal growth of a new pseudopolymorph modification of the polymer compound [CuC₁₂H₈N₄O₂]_n

Prokofiev¹,

Dahlmann

Ritter

et al. 2004

Cryst. Res. Technol.

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The growth of crystals of the coordination polymer [CuC 12 H 8 N 4 O 2 ] n with one-dimensional magnetic properties is reported. Several approaches have been proposed and tested in order to diminish the growth anisotropy and plate-like crystals of an area measuring up to 250×100 µm 2 were grown. The structure and the composition of the crystals are slightly modified with respect to that of earlier synthesized powder. Instead of the water free triclinic phase a monoclinic phase, intercalated by water molecules, forms. In the new modification, the polymer chain layers are bound together by a network of hydrogen bonds, which are stronger than the usual Van der Waals interactions in the triclinic phase. The crystal morphology is plate-like instead of the earlier obtained spherulitic needles.

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“…8 we compare the experimental data for the sound velocity with the theoretical results expressed in Eqs. (10,11). By fitting the static correlation function given by Eq.…”

Section: Ultrasound Experiments On Cs2cucl4mentioning

confidence: 99%

Many-body theory of magnetoelasticity in one dimension

et al. 2017

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We construct a many-body theory of magneto-elasticity in one dimension and show that the dynamical correlation functions of the quantum magnet, connecting the spins with phonons, involve all energy scales. Accounting for all magnetic states non-perturbatively via the exact diagonalisation techniques of Bethe ansatz, we find that the renormalisation of the phonon velocity is a non-monotonous function of the external magnetic field and identify a new mechanism for attenuation of phonons -via hybridisation with the continuum of excitations at high energy. We conduct ultrasonic measurements on a high-quality single crystal of the frustrated spin-1/2 Heisenberg antiferromagnet Cs2CuCl4 in its nearly one-dimensional regime and confirm the theoretical predictions, demonstrating that ultrasound can be used as a powerful probe of strong correlations in one dimension.

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Acoustic and magnetic anomalies near the saturation field of theS=1/2antiferromagnetic Heisenberg chain studied on a Cu(II) coordination polymer

Cited by 25 publications

References 10 publications

Magnetoelastic couplings in the distorted diamond-chain compound azurite

Magnetoelastic couplings in the distorted diamond-chain compound azurite

Crystal growth of a new pseudopolymorph modification of the polymer compound [CuC₁₂H₈N₄O₂]_n

Many-body theory of magnetoelasticity in one dimension

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Acoustic and magnetic anomalies near the saturation field of theS=1/2antiferromagnetic Heisenberg chain studied on a Cu(II) coordination polymer

Cited by 25 publications

References 10 publications

Magnetoelastic couplings in the distorted diamond-chain compound azurite

Magnetoelastic couplings in the distorted diamond-chain compound azurite

Crystal growth of a new pseudopolymorph modification of the polymer compound [CuC12H8N4O2]n

Many-body theory of magnetoelasticity in one dimension

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Product

Resources

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Crystal growth of a new pseudopolymorph modification of the polymer compound [CuC₁₂H₈N₄O₂]_n