Zobrazeno 1 - 10
of 97
pro vyhledávání: '"A, Metavitsiadis"'
Emergent excitation continua in frustrated magnets are a fingerprint of fractionalization, characteristic of quantum spin-liquid states. Recent evidence from Raman scattering for a coupling between such continua and lattice degrees of freedom in puta
Externí odkaz:
http://arxiv.org/abs/2103.09828
Publikováno v:
Phys. Rev. B 104, 104424 (2021)
We study the energy-density dynamics at finite momentum of the two-dimensional Kitaev spin-model on the honeycomb lattice. Due to fractionalization of magnetic moments, the energy relaxation occurs through mobile Majorana matter, coupled to a static
Externí odkaz:
http://arxiv.org/abs/2102.12492
Publikováno v:
Phys. Rev. B 103, 195102 (2021)
We study the Kitaev spin-$1/2$ ladder, a model which exhibits self-localization due to fractionalization caused by exchange frustration. When a weak magnetic field is applied, the model is described by an effective fermionic Hamiltonian, with an addi
Externí odkaz:
http://arxiv.org/abs/2009.04467
Publikováno v:
Phys. Rev. B 101, 235143 (2020)
We study the low-energy properties and, in particular, the magnetization process of a spin-1/2 Heisenberg $J_1-J_2$ sawtooth and frustrated chain (also known as zig-zag ladder) with a spatially anisotropic $g$-factor. We treat the problem both analyt
Externí odkaz:
http://arxiv.org/abs/2002.07190
Publikováno v:
Phys. Rev. B 101, 035103 (2020)
We study the self-energy of phonons, magnetoelastically coupled to the two-dimensional Kitaev spin-model on the honeycomb lattice. Fractionalization of magnetic moments into mobile Majorana matter and a static $\mathbb{Z}_{2}$ gauge field lead to a c
Externí odkaz:
http://arxiv.org/abs/1909.09360
Autor:
Heinze, L., Jeschke, H. O., Mazin, I. I., Metavitsiadis, A., Reehuis, M., Feyerherm, R., Hoffmann, J. -U., Bartkowiak, M., Prokhnenko, O., Wolter, A. U. B., Ding, X., Zapf, V. S., Moya, C. Corvalán, Weickert, F., Jaime, M., Rule, K. C., Menzel, D., Valentí, R., Brenig, W., Süllow, S.
Publikováno v:
Phys. Rev. Lett. 126, 207201 (2021)
We present a combined experimental and theoretical study of the mineral atacamite Cu$_2$Cl(OH)$_3$. Density functional theory yields a Hamiltonian describing anisotropic sawtooth chains with weak 3D connections. Experimentally, we fully characterize
Externí odkaz:
http://arxiv.org/abs/1904.07820
Publikováno v:
Phys. Rev. B 99, 075141 (2019)
We present a study of longitudinal thermal transport in the Kitaev spin model on the honeycomb lattice, focusing on the role of anisotropic exchange to cover both, gapless and gapped phases. Employing a complementary combination of exact diagonalizat
Externí odkaz:
http://arxiv.org/abs/1810.04674
Publikováno v:
Phys. Rev. B 99, 205129 (2019)
We identify fingerprints of a proximate quantum spin-liquid (QSL), observable by finite-temperature dynamical thermal transport within a minimal version of the idealized Kitaev model on a two-leg ladder, if subjected to inevitably present Heisenberg
Externí odkaz:
http://arxiv.org/abs/1806.02344
Autor:
Luo, Qiang, Hu, Shijie, Zhao, Jize, Metavitsiadis, Alexandros, Eggert, Sebastian, Wang, Xiaoqun
Publikováno v:
Phys. Rev. B 97, 214433 (2018)
We investigate a spin-$1/2$ two-leg honeycomb ladder with frustrating next-nearest-neighbor (NNN) coupling along the legs, which is equivalent to two $J_1$-$J_2$ spin chains coupled with $J_\perp$ at odd rungs. The full parameter region of the model
Externí odkaz:
http://arxiv.org/abs/1804.00008
Publikováno v:
Phys. Rev. B 96, 205121 (2017)
We study the dynamical thermal conductivity of the two-dimensional Kitaev spin-model on the honeycomb lattice. We find a strongly temperature dependent low-frequency spectral intensity as a direct consequence of fractionalization of spins into mobile
Externí odkaz:
http://arxiv.org/abs/1707.03836