Clues and criteria for designing a Kitaev spin liquid revealed by thermal and spin excitations of the honeycomb iridate<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Na</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>IrO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>

Yamaji, Youhei; Suzuki, Takafumi; Yamada, Takuto; Suga, Sei Ichiro; Kawashima, Naoki; Imada, Masatoshi

doi:10.1103/physrevb.93.174425

Cited by 106 publications

(118 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3(c). Since the broad maximum of C mag without magnetic phase transitions is qualitatively consistent with a theoretical calculation based on itinerant Majorana fermions 12,36 , the agreement between ∆κ and C mag suggests that the itinerant quasiparticles carry heat. It should be noted that the agreement is confirmed for both heated and unheated groups along with the similar magnitude of ∆κ, despite the different T dependence of χ between these two groups.…”

Section: Resultssupporting

confidence: 79%

“…Even above the ordering temperature, properties proximate to the Kitaev spin liquid were reported for α-RuCl 3 in recent experiments such as Raman and inelastic neutron scattering measurements 19,23,25 . From these measurements, the strength of the Kitaev couplings was estimated to be about 100 K. In addition, measurement of the specific heat 21 suggested magnetic-entropy release at about 90 K, which appears consistent with the theoretical prediction for itinerant Majorana fermions in the Kitaev spin liquid 12,36 . Various experimental techniques have been applied to α-RuCl 3 ; however, its transport properties have not been well explored despite the fact that transport experiments are often used for detecting signatures of spin liquid states and their fractionalized excitations [38][39][40][41] .…”

Section: Introductionsupporting

confidence: 76%

See 1 more Smart Citation

Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α−RuCl3

Hirobe¹,

Sato²,

Shiomi³

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

We have investigated the longitudinal thermal conductivity of α-RuCl3, the magnetic state of which is considered to be proximate to a Kitaev honeycomb model, along with the spin susceptibility and magnetic specific heat. We found that the temperature dependence of the thermal conductivity exhibits an additional peak around 100 K, which is well above the phonon peak temperature (∼ 50 K). The higher-temperature peak position is comparable to the temperature scale of the Kitaev couplings rather than the Néel temperatures below 15 K. The additional heat conduction was observed for all five samples used in this study, and was found to be rather immune to a structural phase transition of α-RuCl3, which suggests its different origin from phonons. Combined with experimental results of the magnetic specific heat, our transport measurement suggests strongly that the higher-temperature peak in the thermal conductivity is attributed to itinerant spin excitations associated with the Kitaev couplings of α-RuCl3. A kinetic approximation of the magnetic thermal conductivity yields a mean free path of ∼ 20 nm at 100 K, which is well longer than the nearest Ru-Ru distance (∼ 3Å), suggesting the long-distance coherent propagation of magnetic excitations driven by the Kitaev couplings. IntroductionQuantum spin liquid is a phase of magnetic insulator in which frustration or quantum fluctuation prohibits magnetic order while keeping spin correlation 1-3 . It induces rich physical phenomena depending on the types of spin liquids, which cannot be realized in standard ordered magnets. Several quantum-spin models have been proposed as possible realizations of quantum spin liquids along with candidate frustrated magnets such as κ- ( Among them, the Kitaev honeycomb model is unique in that the ground state is exactly calculated and known to be a two-dimensional (2D) quantum spin liquid 10 . In this model, spin-1/2 moments, S r , sit on a honeycomb lattice and interact via the bond-dependent Ising couplings; different spin components interact via Ising coupling for the three different bonds of the honeycomb lattice. These anisotropic couplings, called the Kitaev couplings J α S

show abstract

Section: Resultssupporting

confidence: 79%

Section: Introductionsupporting

confidence: 76%

Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α−RuCl3

Hirobe¹,

Sato²,

Shiomi³

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…Evidence for a phase transition can be seen when ϕ ≳ 0.7 on account of the abrupt change in C(T), resembling that of the heat capacity in trivially ordered phases. 33 This finding is consistent with our ED results and the 120-order at ϕ/π = 0.75 seen in refs. 15 28 .…”

Section: Magnetic Order and Perturbationssupporting

confidence: 83%

Path to stable quantum spin liquids in spin-orbit coupled correlated materials

et al. 2018

Self Cite

View full text Add to dashboard Cite

The spin liquid phase is one of the prominent strongly interacting topological phases of matter whose unambiguous confirmation is yet to be reached despite intensive experimental efforts on numerous candidate materials. Recently, a new family of correlated honeycomb materials, in which strong spin-orbit coupling allows for various bond-dependent spin interactions, have been promising candidates to realize the Kitaev spin liquid. Here we study a model with bond-dependent spin interactions and show numerical evidence for the existence of an extended quantum spin liquid region, which is possibly connected to the Kitaev spin liquid state. These results are used to provide an explanation of the scattering continuum seen in neutron scattering on α-RuCl 3 .

show abstract

“…[12] for details). According to previously established theory, spin-1/2 Kitaev QSL should exhibit two peaks in the specific heat, with the one at higher (lower, respectively) temperature being associated with localized (itinerant, respectively) Majorana fermions [12,40,41]. Consequently, entropy release should occur twice when lowering temperature, between which a plateau should exist.…”

mentioning

confidence: 99%

Possible Kitaev Quantum Spin Liquid State in 2D Materials with S=3/2

et al. 2020

Self Cite

View full text Add to dashboard Cite

Quantum spin liquids (QSLs) form an extremely unusual magnetic state in which the spins are highly correlated and fluctuate coherently down to the lowest temperatures, but without symmetry breaking and without the formation of any static long-range-ordered magnetism. Such intriguing phenomena are not only of great fundamental relevance in themselves, but also hold the promise for quantum computing and quantum information. Among different types of QSLs, the exactly solvable Kitaev model is attracting much attention, with most proposed candidate materials, e.g., RuCl3 and Na2IrO3, having an effective S=1/2 spin value. Here, via extensive first-principlebased simulations, we report the investigation of the Kitaev physics and possible Kitaev QSL state in epitaxially strained Cr-based monolayers, such as CrSiTe3, that rather possess a S=3/2 spin value. Our study thus extends the playground of Kitaev physics and QSLs to 3d transition metal compounds. :2002.12184v1 [cond-mat.mtrl-sci] arXiv

show abstract

Clues and criteria for designing a Kitaev spin liquid revealed by thermal and spin excitations of the honeycomb iridateNa2IrO3

Cited by 106 publications

References 39 publications

Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α−RuCl3

Magnetic thermal conductivity far above the Néel temperature in the Kitaev-magnet candidate α−RuCl3

Path to stable quantum spin liquids in spin-orbit coupled correlated materials

Possible Kitaev Quantum Spin Liquid State in 2D Materials with S=3/2

Contact Info

Product

Resources

About