High-pressure inelastic neutron scattering study of the anisotropic 
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 spin chain 
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Pajerowski, Daniel M.; Podlesnyak, A.; Herbrych, Jacek; Manson, Jamie L.

doi:10.1103/physrevb.105.134420

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…It also serves as a testing ground for sophisticated numerical methods. Recently, the tunable single-ion anisotropic effects have been realized experimentally in spin-1 models with ultra-cold atoms [13], and in the compound [Ni(HF 2 )(3-Clpyradine) 4 ]BF 4 with inelastic neutron scattering by pressure variance [14]. There are more details about the anisotropic effects and the phase diagram of this system in [7,8,[15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Exploring quantum phase transitions by the cross derivative of the ground state energy

Tzeng

Xie

et al. 2023

New J. Phys.

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In this work, the cross derivative of the Gibbs free energy, initially proposed for phase transitions in classical spin models [Phys. Rev. B 101, 165123 (2020)], is extended for quantum systems. We take the spin-1 XXZ chain with anisotropies as an example to demonstrate its effectiveness and convenience for the Gaussian-type quantum phase transitions therein. These higher-order transitions are very challenging to determine by conventional methods. From the cross derivative with respect to the two anisotropic strengths, a single valley structure is observed clearly in each system size. The finite-size extrapolation of the valley depth shows a perfect logarithmic divergence, signaling the onset of a phase transition. Meanwhile, the critical point and the critical exponent for the correlation length are obtained by a power-law fitting of the valley location in each size. The results are well consistent with the best estimations in the literature. Its application to other quantum systems with continuous phase transitions is also discussed briefly.

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Section: Introductionmentioning

confidence: 99%

Exploring quantum phase transitions by the cross derivative of the ground state energy

Tzeng

Xie

et al. 2023

New J. Phys.

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“…Toward this end, we have studied a variety of coordination-polymer magnetic systems with different dimensionalities, exchange energies, and spin quantum numbers (see, e.g., Refs. [2][3][4][5][6][7][8][9][10][11]). Within the field of quantum magnets, the subfield of two-dimensional (2D) systems is attractive due to the ability to support long-range entangled states [12] and the analogies to theories of high-temperature superconductivity (HTSC).…”

Section: Introductionmentioning

confidence: 99%

Spatially anisotropic S=1 square-lattice antiferromagnet with single-ion anisotropy realized in a Ni(II) pyrazine- n,n′ -dioxide coordination polymer

Manson,

Pajerowski,

Donovan

et al. 2023

Phys. Rev. B

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The Ni(NCS) 2 (pyzdo) 2 coordination polymer is found to be an S = 1 spatially anisotropic square lattice with easy-axis single-ion anisotropy. This conclusion is based upon considering in concert the experimental probes x-ray diffraction, magnetic susceptibility, magnetic-field-dependent heat capacity, muon-spin relaxation, neutron diffraction, neutron spectroscopy, and pulsed-field magnetization. Long-range antiferromagnetic (AFM) order develops at T N = 18.5 K. Although the samples are polycrystalline, there is an observable spin-flop transition and saturation of the magnetization at ≈80 T. Linear spin-wave theory yields spatially anisotropic exchanges within an AFM square lattice, J x =0.235 meV, J y =2.014 meV, and an easy-axis single-ion anisotropy D=−1.622 meV (after renormalization). The anisotropy of the exchanges is supported by density functional theory.

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First-Principles Study of the Optical Properties of TMDC/Graphene Heterostructures

Yang

Chang

2022

Photonics

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The transition-metal dichalcogenide (TMDC) in the family of MX2 (M=Mo,W; X=S,Se) and the graphene (Gr) monolayer are an atomically thin semiconductor and a semimetal, respectively. The monolayer MX2 has been discovered as a new class of semiconductors for electronics and optoelectronics applications. Because of the hexagonal lattice structure of both materials, MX2 and Gr are often combined with each other to generate van der Waals heterostructures. Here, the MX2/Gr heterostructures are investigated theoretically based on density functional theory (DFT). The electronic structure and the optical properties of four different MX2/Gr heterostructures are computed. We systematically compare these MX2/Gr heterostructures for their complex permittivity, absorption coefficient, reflectivity and refractive index.

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High-pressure inelastic neutron scattering study of the anisotropic S=1 spin chain [Ni(HF2)

Cited by 3 publications

References 31 publications

Exploring quantum phase transitions by the cross derivative of the ground state energy

Exploring quantum phase transitions by the cross derivative of the ground state energy

Spatially anisotropic S=1 square-lattice antiferromagnet with single-ion anisotropy realized in a Ni(II) pyrazine- n,n′ -dioxide coordination polymer

First-Principles Study of the Optical Properties of TMDC/Graphene Heterostructures

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