Evidence of a Bond-Nematic Phase in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>LiCuVO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>

Mourigal, Martin; Enderle, M.; Fåk, B.; Kremer, Reinhard K.; Law, J. M.; Schneidewind, A.; Hiess, A.; Prokofiev, A.

doi:10.1103/physrevlett.109.027203

Cited by 113 publications

(158 citation statements)

References 26 publications

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“…66 for explicit calculations. We thus would like to posit that a recent neutron scattering study 67 , which observed longitudinal spin fluctuations but no transverse ones, is very much consistent with SDW phase scenario. Like the spin nematic phase, which is expected to occur at much higher magnetic fields, the SDW phase does not support lowenergy transverse spin excitations.…”

Section: A Implications For Two Dimensionsmentioning

confidence: 99%

Ground states of spin-12triangular antiferromagnets in a magnetic field

Chen

Jiang

et al. 2013

Phys. Rev. B

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We use a combination of numerical density matrix renormalization group (DMRG) calculations and several analytical approaches to comprehensively study a simplified model for a spatially anisotropic spin-1/2 triangular lattice Heisenberg antiferromagnet: the three-leg triangular spin tube (TST). The model is described by three Heisenberg chains, with exchange constant J, coupled antiferromagnetically with exchange constant J along the diagonals of the ladder system, with periodic boundary conditions in the shorter direction. Here we determine the full phase diagram of this model as a function of both spatial anisotropy (between the isotropic and decoupled chain limits) and magnetic field. We find a rich phase diagram, which is remarkably dominated by quantum states -the phase corresponding to the classical ground state appears only in an exceedingly small region. Among the dominant phases generated by quantum effects are commensurate and incommensurate coplanar quasi-ordered states, which appear in the vicinity of the isotropic region for most fields, and in the high field region for most anisotropies. The coplanar states, while not classical ground states, can at least be understood semiclassically. Even more strikingly, the largest region of phase space is occupied by a spin density wave phase, which has incommensurate collinear correlations along the field. This phase has no semiclassical analog, and may be ascribed to enhanced one-dimensional fluctuations due to frustration. Cutting across the phase diagram is a magnetization plateau, with a gap to all excitations and "up up down" spin order, with a quantized magnetization equal to 1/3 of the saturation value. In the TST, this plateau extends almost but not quite to the decoupled chains limit. Most of the above features are expected to carry over to the two dimensional system, which we also discuss. At low field, a dimerized phase appears, which is particular to the one dimensional nature of the TST, and which can be understood from quantum Berry phase arguments.

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Section: A Implications For Two Dimensionsmentioning

confidence: 99%

Ground states of spin-12triangular antiferromagnets in a magnetic field

Chen

Jiang

et al. 2013

Phys. Rev. B

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“…Especially, the so-called spin-nematic state has recently received strong interest [9][10][11][12][13][14] . The spin-nematic phase can be likened to the arrangement of molecules in nematic liquid crystals.…”

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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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confidence: 99%

“…Among these compounds, the most often studied is LiCuVO 4 with J 1 = −19 K and J 2 = 44 K [25]. It has been shown using large single crystals that LiCuVO 4 exhibits an incommensurate helical order at low fields [25][26][27][28][29], which may be a 3D analogue of the vector chirality order in the J 1 -J 2 chain, and a longitudinal SDW order at intermediate fields [26][27][28][29]. Furthermore, a spin nematic phase, a 3D analogue of the spin nematic state, has been suggested slightly below the saturation field of 44.4 T at H c, where the magnetization shows a linear field dependence [30].…”

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confidence: 99%

“…One more important requirement for a good candidate compound is the availability of a large and clean single crystal. Among the compounds shown in Table I [20][21][22], and LiCuVO 4 [23][24][25][26][27][28][29][30][31]. However, "a cleanness" of these crystals seems unsatisfactory: a natural crystal of PbCuSO 4 (OH) 2 is contaminated by impurities, and the two Li-containing crystals seem to suffer from Li deficiency or an interchange between Li and Cu atoms [24].…”

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NaCuMoO₄(OH) as a Candidate Frustrated J₁–J₂ Chain Quantum Magnet

et al. 2014

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In a frustrated J1-J2 chain with the nearest-neighbor ferromagnetic interaction J1 and the nextnearest-neighbor antiferromagnetic interaction J2, novel magnetic states such as a spin-nematic state are theoretically expected. However, they have been rarely examined in experiments because of the difficulty in obtaining suitable model compounds. We show here that the quasi-one-dimensional antiferromagnet NaCuMoO4(OH), which comprises edge-sharing CuO2 chains, is a good candidate J1-J2 chain antiferromagnet. The exchange interactions are estimated as J1 = −51 K and J2 = 36 K by comparing the magnetic susceptibility, heat capacity, and magnetization data with the data obtained using calculations by the exact diagonalization method. High-field magnetization measurements at 1.3 K show a saturation above 26 T with little evidence of a spin nematic state expected just below the saturation field, which is probably due to smearing effects caused by thermal fluctuations and the polycrystalline nature of the sample.Low-dimensional quantum spin systems with geometrical frustration and/or competing magnetic interactions have attracted much attention in the field of magnetism. Low dimensionality, quantum fluctuations, and frustration are three ingredients that may effectively suppress conventional magnetic order and lead us to unconventional magnetic order or exotic ground states such as a quantum spin liquid [1,2].A frustrated J 1 -J 2 chain of spin 1/2 defined asprovides us with an interesting example: the competition between the nearest-neighbor (NN) ferromagnetic interaction J 1 and the next-nearest-neighbor (NNN) antiferromagnetic interaction J 2 causes various quantum states in magnetic fields h [3][4][5][6][7]. Realized in low fields is a long-range order of vector chirality defined as (s l × s l+n ) z (n = 1, 2). As the field increases, spin correlations change markedly because bound magnon pairs are stabilized by ferromagnetic J 1 . The bound magnon pairs form a spin density wave (SDW) in medium fields, whereas, in high fields just below the saturation of magnetization, they exhibit Bose-Einstein condensation into quantum multipolar states [8][9][10][11]. One of the multipolar states expected just below the saturation is a quadrupolar state of magnon pairs called a spin nematic state, analogous to nematic liquid crystals. To explore these quantum states theoretically predicted for the frustrated J 1 -J 2 chain, many experimental studies have been performed on quasi-1D compounds * knawa@issp.u-tokyo.ac.jp † Present address: Department of Applied Physics, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan TABLE I. Candidate compounds for the J1-J2 chain system. Listed are the nearest-neighbor intrachain interaction J1, the next-nearest-neighbor interaction J2, the bond angles of Cu-O-Cu paths for J1, the antiferromagnetic transition temperature at zero field TN, and the saturation field Hs. Thus, according to the Goodenough-Kanamori rule, J 1 should be ferromagnetic while J 2 can be antife...

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Evidence of a Bond-Nematic Phase inLiCuVO4

Cited by 113 publications

References 26 publications

Ground states of spin-12triangular antiferromagnets in a magnetic field

Ground states of spin-12triangular antiferromagnets in a magnetic field

Dynamics of linarite: Observations of magnetic excitations

NaCuMoO₄(OH) as a Candidate Frustrated J₁–J₂ Chain Quantum Magnet

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Evidence of a Bond-Nematic Phase inLiCuVO4

Cited by 113 publications

References 26 publications

Ground states of spin-12triangular antiferromagnets in a magnetic field

Ground states of spin-12triangular antiferromagnets in a magnetic field

Dynamics of linarite: Observations of magnetic excitations

NaCuMoO4(OH) as a Candidate Frustrated J1–J2 Chain Quantum Magnet

Contact Info

Product

Resources

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NaCuMoO₄(OH) as a Candidate Frustrated J₁–J₂ Chain Quantum Magnet