Cubic symmetry and magnetic frustration on the fcc spin lattice in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">K</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>IrCl</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>

Khan, N.; Prishchenko, Danil; Skourski, Y.; Mazurenko, V. G.; Tsirlin, Alexander A.

doi:10.1103/physrevb.99.144425

Cited by 33 publications

(46 citation statements)

References 47 publications

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“…The positive χ 0 contribution leads to a weak curvature of 1/χ above 600 K and can not account for the more pronounced downward curvature below 250 K. In our case, χ 0 stands for a combination of two temperature-independent contributions, the negative one from the core diamagnetism estimated as χ core = −8.41× 10 −10 m 3 /mol [29], and the positive one from the van Vleck paramagnetism, χ VV . Using χ 0 = χ core +χ VV , we estimate χ VV = 1.94 × 10 −9 m 3 /mol that is comparable to 1.3 × 10 −9 m 3 /mol (Na 2 IrO 3 [30]), 2.7 × 10 −9 m 3 /mol (α-Li 2 IrO 3 [30]), and 1.4 × 10 −9 m 3 /mol (K 2 IrCl 6 [31]) reported in the previous literature for Ir 4+ in the j eff = 1 2 state.…”

Section: Magnetization: Temperature Dependencementioning

confidence: 85%

Anisotropic temperature-field phase diagram of single crystalline β−Li2IrO3 : Magnetization, specific heat, and Li7

Majumder

Freund

Dey

et al. 2019

Phys. Rev. Materials

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Detailed magnetization, specific heat, and 7 Li nuclear magnetic resonance (NMR) measurements on single crystals of the hyperhoneycomb Kitaev magnet β-Li2IrO3 are reported. At high temperatures, anisotropy of the magnetization is reflected by the different Curie-Weiss temperatures for different field directions, in agreement with the combination of a ferromagnetic Kitaev interaction (K) and a negative off-diagonal anisotropy (Γ) as two leading terms in the spin Hamiltonian. At low temperatures, magnetic fields applied along a or c have only a weak effect on the system and reduce the Néel temperature from 38 K at 0 T to about 35.5 K at 14 T, with no field-induced transitions observed up to 58 T on a powder sample. In contrast, the field applied along b causes a drastic reduction in the TN that vanishes around Hc = 2.8 T giving way to a crossover toward a quantum paramagnetic state. 7 Li NMR measurements in this field-induced state reveal a gradual line broadening and a continuous evolution of the line shift with temperature, suggesting the development of local magnetic fields. The spin-lattice relaxation rate shows a peak around the crossover temperature 40 K and follows power-law behavior below this temperature. arXiv:1906.09089v2 [cond-mat.str-el]

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Section: Magnetization: Temperature Dependencementioning

confidence: 85%

Anisotropic temperature-field phase diagram of single crystalline β−Li2IrO3 : Magnetization, specific heat, and Li7

Majumder

Freund

Dey

et al. 2019

Phys. Rev. Materials

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“…Separately, there has been significant interest in the single‐ion physics of vacancy‐ordered double perovskites and related systems of heavy transition metals. Some progress has been made in this direction on Re IV (5 d 3 ), [19, 20] Os IV (5 d 4 ), [21, 22] and Ir IV (5 d 5 ), [23] halides, with the last two exhibiting strong spin‐orbit coupling (SOC) effects. The ability to tune the strength of SOC can give rise to a plethora of ground states of interest to quantum sensing and computing [24] …”

Section: Figurementioning

confidence: 99%

Chemical Control of Spin‐Orbit Coupling and Charge Transfer in Vacancy‐Ordered Ruthenium(IV) Halide Perovskites

et al. 2021

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Vacancy-ordered double perovskites are attracting significant attention due to their chemical diversity and interesting optoelectronic properties. With a view to understanding both the optical and magnetic properties of these compounds, two series of Ru IV halides are presented; A 2 RuCl 6 and A 2 RuBr 6 , where A is K, NH 4 , Rb or Cs. We show that the optical properties and spin-orbit coupling (SOC) behavior can be tuned through changing the A cation and the halide. Within a series, the energy of the ligand-to-metal charge transfer increases as the unit cell expands with the larger A cation, and the band gaps are higher for the respective chlorides than for the bromides. The magnetic moments of the systems are temperature dependent due to a non-magnetic ground state with J eff = 0 caused by SOC. Ru-X covalency, and consequently, the delocalization of metal d-electrons, result in systematic trends of the SOC constants due to variations in the A cation and the halide anion. Remarkable developments in perovskite-based photovoltaics over the last decade have driven the discovery of a wide range of new halide perovskites and related solids. [1-4] These include 3D perovskites with different divalent metals (i.e., Pb II and Sn II), [5, 6] 3D double perovskites with a combination of univalent and trivalent metals (i.e., K I /Bi III and Ag I / Bi III), [7, 8] as well as low dimensional 2D, [9] and 1D perovskites. [10] Progress in this area has also rekindled interest in K 2 Pt IV Cl 6-type vacancy-ordered double perovskites, comprising isolated metal halide octahedra interspersed with mono-valent cation. For example, the vacancy-ordered halides of Sn IV , [11] Se IV , [12] Te IV , [13, 14] and Ti IV , [15] have shown to be promising photovoltaic materials. The analogous variants of

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“…The symmetries of the lattice are important along with a broad impact on the physical phenomena determining electric and magnetic properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Fortunately, the crystallography group, the set of symmetries compatible with the lattice translational symmetry, has been clarified for any dimensions 6,7,10,12, [16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Discovery of new quasicrystals from translation of hypercubic lattice

Jeon¹,

Lee²

2021

Preprint

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How are the symmetries encoded in quasicrystals? As a compensation for the lack of translational symmetry, quasicrystals admit non-crystallographic symmetries such as 5-and 8-fold rotations in two-dimensional space. It is originated from the extended crystallography group of high-dimensional lattices and projection onto the physical space having a finite perpendicular window. One intriguing question is : How does the translation operation in high-dimension affect to the quasicrystals as a consequence of the projection? Here, we answer to this question and prove that a simple translation in four-dimensional hypercubic lattice completely determines a distinct rotational symmetry of two-dimensional quasicrystals. In details, by classifying translations in four-dimensional hypercubic lattice, new types of quasicrystals with 2,4 and 8-fold rotational symmetries are discussed. It gives us an important insight that a translation in high-dimensional lattice is intertwined with a rotational symmetry of the quasicrystals. In addition, regarding to the four dimensional matters, it provides a unique way to discover new quasicrystals projected from the recent finding -a four dimensional time crystal.

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Cubic symmetry and magnetic frustration on the fcc spin lattice in K2IrCl6

Cited by 33 publications

References 47 publications

Anisotropic temperature-field phase diagram of single crystalline β−Li2IrO3 : Magnetization, specific heat, and Li7

Anisotropic temperature-field phase diagram of single crystalline β−Li2IrO3 : Magnetization, specific heat, and Li7

Chemical Control of Spin‐Orbit Coupling and Charge Transfer in Vacancy‐Ordered Ruthenium(IV) Halide Perovskites

Discovery of new quasicrystals from translation of hypercubic lattice

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