Nature of Magnetic Excitations in the High-Field Phase of α-RuCl_{3}.

  title={Nature of Magnetic Excitations in the High-Field Phase of $\alpha$-RuCl\_\{3\}.},
  author={A. N. Ponomaryov and L A Zviagina and Joachim Wosnitza and Paula Lampen-Kelley and Arnab Banerjee and J.-Q. Yan and Craig A. Bridges and David G. Mandrus and Stephen E. Nagler and Sergei A. Zvyagin},
  journal={Physical review letters},
  volume={125 3},
We present comprehensive electron spin resonance (ESR) studies of in-plane oriented single crystals of α-RuCl_{3}, a quasi-two-dimensional material with honeycomb structure, focusing on its high-field spin dynamics. The measurements were performed in magnetic fields up to 16 T, applied along the [110] and [100] directions. Several ESR modes were detected. Combining our findings with recent inelastic neutron- and Raman-scattering data, we identified most of the observed excitations. Most… 

Figures from this paper

The planar thermal Hall conductivity in the Kitaev magnet {\alpha}-RuCl3

We report detailed measurements of the Onsager-like planar thermal Hall conductivity κ xy in α -RuCl 3 , a spin-liquid candidate of topical interest. With the thermal current J Q and magnetic field B

Static magnetic and ESR spectroscopic properties of the dimer-chain antiferromagnet BiCoPO$_5$

We report a comprehensive study of the static susceptibility, high-field magnetization and high-frequency/high-magnetic field electron spin resonance (HF-ESR) spectroscopy of polycrystalline samples of

Identification of magnetic interactions and high-field quantum spin liquid in α-RuCl3

The microscopic spin model that quantitatively explains major observations in α-RuCl3, including the zigzag order, double-peak specific heat, magnetic anisotropy, and the characteristic M-star dynamical spin structure, is determined.

Magnetic anisotropy reversal driven by structural symmetry-breaking in monolayer α-RuCl3.

Layered α-RuCl3 is a promising material to potentially realize the long-sought Kitaev quantum spin liquid with fractionalized excitations. While evidence of this state has been reported under a

Neutron Spectroscopy Evidence for a Possible Magnetic-Field-Induced Gapless Quantum-Spin-Liquid Phase in a Kitaev Material α-RuCl3

As one of the most promising Kitaev quantum-spin-liquid (QSL) candidates, α-RuCl3 has received a great deal of attention. However, its ground state exhibits a long-range zigzag magnetic order, which

Thermodynamic Perspective on Field-Induced Behavior of α-RuCl_{3}.

It is shown theoretically that at low temperatures Γ_{B} is sensitive to crossings in the lowest excitations within gapped phases, and it is identified that the measured shoulderlike anomaly can be reproduced in extended Kitaev models that gain proximity to an additional phase at finite field without entering it.

Microscopic probe of magnetic polarons in antiferromagnetic Eu5In2Sb6

Colossal magnetoresistance (CMR) emerges from intertwined spin and charge degrees of freedom in the form of ferromagnetic clusters also known as trapped magnetic polarons. As a result, CMR is rarely

Planar thermal Hall effect of topological bosons in the Kitaev magnet α-RuCl3

The honeycomb magnet α-RuCl3 has attracted considerable interest because it is proximate to the Kitaev Hamiltonian whose excitations are Majoranas and vortices. The thermal Hall conductivity κxy of

Robustness of the thermal Hall effect close to half-quantization in α-RuCl3

A key feature of quantum spin liquids is the predicted formation of fractionalized excitations. They are expected to produce changes in the physical response, providing a way to observe the quantum

High-field quantum spin liquid transitions and angle-field phase diagram of Kitaev magnet $\alpha$-RuCl$_3$

The pursuit of quantum spin liquid (QSL) in the Kitaev honeycomb magnets has drawn intensive attention recently. In particular, α -RuCl 3 has been widely recognized as a promising candidate for the



Probing α-RuCl_{3} Beyond Magnetic Order: Effects of Temperature and Magnetic Field.

A very rich evolution of the spin dynamics as the applied field suppresses the zigzag order and stabilizes a quantum paramagnetic state that is adiabatically connected to the fully polarized state at high fields is found.

Scattering continuum and possible fractionalized excitations in α-RuCl(3).

A Raman scattering study that provides evidence for unconventional excitations in α-RuCl_{3}, a spin-orbit coupled Mott insulator on the honeycomb lattice, and reveals unusual magnetic scattering, typified by a broad continuum.

Magnetic order in α -RuCl 3 : A honeycomb-lattice quantum magnet with strong spin-orbit coupling

We report magnetic and thermodynamic properties of single crystal $\alpha$-RuCl$_3$, in which the Ru$^{3+}$ ($4d^5$) ion is in its low spin state and forms a honeycomb lattice. Two features are

Unconventional spin dynamics in the honeycomb-lattice material α − RuCl 3 : High-field electron spin resonance studies

The honeycomb-lattice material $\ensuremath{\alpha}$-RuCl${}_{3}$ is a prime candidate for exhibiting Kitaev spin-liquid physics. Here, the authors employ high-field electron spin resonance

High-field quantum disordered state in α−RuCl3 : Spin flips, bound states, and multiparticle continuum

Layered $\alpha$-RuCl3 has been discussed as a proximate Kitaev spin liquid compound. Raman and THz spectroscopy of magnetic excitations confirm that the low-temperature antiferromagnetic ordered

Modes of magnetic resonance in the spin-liquid phase of Cs2CuCl4.

The observation of a frequency shift and splitting of the ESR mode of the low-dimensional S=1/2 frustrated antiferromagnet Cs2CuCl4 in the spin-correlated state above the ordering temperature 0.62 K is reported.

Magnetic Excitations and Continuum of a Possibly Field-Induced Quantum Spin Liquid in α-RuCl_{3}.

Terahertz spectroscopy of quantum spin dynamics in α-RuCl_{3], a system proximate to the Kitaev honeycomb model, as a function of temperature and magnetic field is reported, characterizing the dynamical properties of a possibly field-induced quantum spin liquid.

Antiferromagnetic Resonance and Terahertz Continuum in α-RuCl_{3}.

Measurements of optical absorption in the zigzag antiferromagnet α-RuCl_{3} as a function of temperature T, magnetic field B, and photon energy ℏω and an upper bound on the contribution to the dc susceptibility from a magnetic excitation continuum are placed.

Signatures of low-energy fractionalized excitations in α−RuCl3 from field-dependent microwave absorption

Topologically ordered states of matter are generically characterized by excitations with quantum number fractionalization. A prime example is the spin liquid realized in Kitaev's honeycomb-lattice