Thermodynamic and magnetic properties of the<i>S</i>=1 Heisenberg chain Ni(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:msub></mml:

Orendáč, M.; Orendáčová, A.; Černák, Juraj; Feher, A.; Signore, P.J.C.; Meisel, Mark W.; Merah, S.; Verdaguer, Michel

doi:10.1103/physrevb.52.3435

Cited by 83 publications

(45 citation statements)

References 18 publications

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“…Our specific heat data measurements together with complementary data of susceptibility, magnetization, and ESR measurements, which were published elsewhere [5][6][7], have confirmed that NENC, NDPK, and NBYC can be considered as a quantum S = 1 magnetic chain with planar anisotropy and nonzero in-plane anisotropy. Specific-heat data were analyzed within the framework of the extended strong-coupling theory with in-plane anisotropy incorporated [8].…”

Section: Introductionmentioning

confidence: 65%

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Specific heat study of magnetic excitations in a one-dimensional S=1 Heisenberg magnet with strong planar anisotropy

Feher

Orendáč

Orendáčová

et al. 2002

Low Temperature Physics

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O are reported. All compounds are identified as S = 1 planar Heisenberg magnetic chains with large planar anisotropy and different values of the in-plane anisotropy constant. The low-temperature specific heat data are interpreted assuming the existence of noninteracting excitons and antiexcitons as elementary excitations from the singlet-ground state. The extended strong-coupling model is used for analysis of the data at higher temperatures. The applicability of the models used with respect to the value of the in-plane anisotropy is discussed.

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Section: Introductionmentioning

confidence: 65%

“…(4) The analysis of NENC specific heat using DEA [5] showed that the theoretical approach [3,4] requires further extension in three ways. First, to provide calculations of the specific heat that are valid beyond the low-temperature region.…”

Section: Strong-coupling Theory For S=1 Planar Magnetic Chainmentioning

confidence: 99%

Specific heat study of magnetic excitations in a one-dimensional S=1 Heisenberg magnet with strong planar anisotropy

Feher

Orendáč

Orendáčová

et al. 2002

Low Temperature Physics

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“…Energetic spectrum of these chains consists of three excitation branches approximately in the same energetic domain of magnon dispersion curve, two-magnon continuum and single-ion bound states. The presence of these low-lying magnetic excitations was experimentally observed in EPR experiments [29] and also in thermodynamic properties of Ni(C 2 H 8 N 2 ) 2 Ni(CN) 4 , usually referred to with the abbreviated symbol NENC [30]. Population of excitations of different branches has a strong magnetic dependence, which opens a possibility to «tune», by external magnetic field, the contribution of different kind of the magnetic excitations to the total magnon heat flux.…”

Section: Magnons and Fano Resonancementioning

confidence: 98%

Resonance absorption, reflection, transmission of phonons and heat transfer through interface between two solids

Kosevich

Feher

Syrkin

2008

Low Temperature Physics

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The different mechanisms of resonant transport of phonons between two media in the presence of impurity intermediate layer are described. Particular attention is focused on the resonance interaction of elastic waves with a two-dimensional defect on the contact boundary between two solids, on the multichannel interface phonon scattering and on the experimentally observed nonmonotonic temperature dependence of the reduced heat flux. In the cases when there is a direct interaction between edge atoms of the matrix as non-nearest neighbors or when the impurities do not fill completely the 2D interface layer, the additional channel for the transmission of phonons through the interface opens. This additional transmission channel manifests itself as a transmission (or reflection or absorption) peak with an asymmetric line shape (the so-called Fano resonance for phonons due to interference between the two transmission channels). Some applications of the Fano effect in magnon heat conductivity are also discussed. PACS: 63.20.-e Phonons in crystal lattices.

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“…In real materials the uniaxial anisotropy can be created through the environment of the magnetic ion [19][20][21] which implies adding the extra term to the Hamiltonian (Eq. (1)):…”

Section: The Non-zero Uniaxial Anisotropymentioning

confidence: 99%

Relaxation Dynamics in the Spin-1 Heisenberg Antiferromagnetic Chain after a Quantum Quench of the Uniaxial Anisotropy

2016

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In the framework of the matrix product state representation the effect of a sudden turning on of the uniaxial anisotropy on the time evolution of the Haldane state has been investigated. Depending on the value of the uniaxial anisotropy parameter, the calculations were derived within (or outside) the region where the Haldane gap survives. An exact expression for the time evolution of the Loschmidt echo has been derived and, moreover, its collapse and revival behaviour was captured. In addition, the non-local order parameter of a time evolving state was tracked, revealing two types of relaxations.

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Thermodynamic and magnetic properties of theS=1 Heisenberg chain Ni(C2H8

Cited by 83 publications

References 18 publications

Specific heat study of magnetic excitations in a one-dimensional S=1 Heisenberg magnet with strong planar anisotropy

Specific heat study of magnetic excitations in a one-dimensional S=1 Heisenberg magnet with strong planar anisotropy

Resonance absorption, reflection, transmission of phonons and heat transfer through interface between two solids

Relaxation Dynamics in the Spin-1 Heisenberg Antiferromagnetic Chain after a Quantum Quench of the Uniaxial Anisotropy

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