Helical ground state and weak ferromagnetism in the edge-shared chain cuprate NaCu
                    <sub>2</sub>
                    O
                    <sub>2</sub>

Drechsler, S.‐L.; Richter, Johannes; Gippius, A. A.; Vasiliev, A. N.; Bush, A. A.; Moskvin, A. S.; Málek, Jiřı́; Prots, Yurii; Schnelle, Walter; Rösner, H.

doi:10.1209/epl/i2005-10356-y

Cited by 72 publications

(63 citation statements)

References 30 publications

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“…The position of the magnetic orbital makes the coupling J a negligible (see Ref. 28 for a similar example). The coupling J d is still allowed for the d x 2 −y 2 orbital.…”

Section: Crystal Structure and Magnetic Propertiesmentioning

confidence: 99%

β-Cu2V2O7: A spin-1

2010

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We report on band structure calculations and a microscopic model of the low-dimensional magnet β-Cu2V2O7. Magnetic properties of this compound can be described by a spin-1 2 anisotropic honeycomb lattice model with the averaged couplingJ1 = 60 − 66 K. The low symmetry of the crystal structure leads to two inequivalent couplings J1 and J ′ 1 , but this weak spatial anisotropy does not affect the essential physics of the honeycomb spin lattice. The structural realization of the honeycomb lattice is highly non-trivial: the leading interactions J1 and J ′ 1 run via double bridges of VO4 tetrahedra between spatially separated Cu atoms, while the interactions between structural nearest neighbors are negligible. The non-negligible inter-plane coupling J ⊥ ≃ 15 K gives rise to the long-range magnetic ordering at TN ≃ 26 K. Our model simulations improve the fit of the magnetic susceptibility data, compared to the previously assumed spin-chain models. Additionally, the simulated ordering temperature of 27 K is in remarkable agreement with the experiment. Our study evaluates β-Cu2V2O7 as the best available experimental realization of the spin-1 2 Heisenberg model on the honeycomb lattice. We also provide an instructive comparison of different band structure codes and computational approaches to the evaluation of exchange couplings in magnetic insulators.

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“…The position of the magnetic orbital makes the coupling J a negligible (see Ref. 28 for a similar example). The coupling J d is still allowed for the d x 2 −y 2 orbital.…”

Section: Crystal Structure and Magnetic Propertiesmentioning

confidence: 99%

β-Cu2V2O7: A spin-1

2010

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“…From the approximate solution of such models, the magnetic ground state and its excitations can be estimated. In the following, this procedure is demonstrated exemplarily for the compounds Sr 2 Cu(PO 4 ) 2 [16] and ACu 2 O 2 (AQNa, Li) [17][18][19][20][21].…”

Section: Electronic Structure Calculationsmentioning

confidence: 99%

“…Another example for the realization of an unusual magnetic ground state is the isostructural compounds LiCu 2 O 2 and NaCu 2 O 2 , which exhibit a helical magnetic order at low temperatures [17][18][19][20][21]. The crystal structure of LiCu 2 O 2 and NaCu 2 O 2 is shown in Fig.…”

Section: Electronic Structure Calculationsmentioning

confidence: 99%

Cu^II materials—From crystal chemistry to magnetic model compounds

Rösner

Johannes

Drechsler³

et al. 2007

Science and Technology of Advanced Materials

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Based on electronic structure calculations within the density functional theory, we report a systematic approach for the modelling of low-dimensional Cu II materials. Combining concepts of crystal chemistry with ab initio-based magnetic models, we present a systematic study of recently discovered compounds. Our calculation results are in good agreement with thermodynamic and magnetic measurements, suggesting the presented approach as a well-directed route to explore the magnetic phase diagram of low-dimensional Cu II systems.

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“…One of them expected just below saturation is the quadrupolar state of bound magnon pairs which is termed the spin-nematic state 19 . The J 1 -J 2 model has been used to describe various quasi-1D edge-sharing cuprates 12,[21][22][23][24][25][26][27][28][29] . Unfortunately, for many of the candidates for exhibiting multipolar phases, the involved AFM magnetic couplings and thus the saturation field are quite large, making it difficult to probe the multipolar phases.…”

mentioning

confidence: 99%

Dynamics of linarite: Observations of magnetic excitations

et al. 2017

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Here we present inelastic neutron scattering measurements from the frustrated, quantum spin-1/2 chain material linarite, PbCuSO4(OH)2. Time of flight data, taken at 0.5 K and zero applied magnetic field reveals low-energy dispersive spin wave excitations below 1.5 meV both parallel and perpendicular to the Cu-chain direction. From this we confirm that the interchain couplings within linarite are around 10 % of the nearest neighbour intrachain interactions. We analyse the data within both linear spin-wave theory and density matrix renormalisation group theories and establish the main magnetic exchange interactions and the simplest realistic Hamiltonian for this material.

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Helical ground state and weak ferromagnetism in the edge-shared chain cuprate NaCu ₂ O ₂

Cited by 72 publications

References 30 publications

β-Cu2V2O7: A spin-1

β-Cu2V2O7: A spin-1

Cu^II materials—From crystal chemistry to magnetic model compounds

Dynamics of linarite: Observations of magnetic excitations

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Helical ground state and weak ferromagnetism in the edge-shared chain cuprate NaCu 2 O 2

Cited by 72 publications

References 30 publications

β-Cu2V2O7: A spin-1

β-Cu2V2O7: A spin-1

CuII materials—From crystal chemistry to magnetic model compounds

Dynamics of linarite: Observations of magnetic excitations

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Product

Resources

About

Helical ground state and weak ferromagnetism in the edge-shared chain cuprate NaCu ₂ O ₂

Cu^II materials—From crystal chemistry to magnetic model compounds