53 citations · 406 across the 18 of their papers we have counts for
18 papers
Optical phonons coupled to a Kitaev spin liquid
A. Metavitsiadis, W. Natori, J. Knolle +1
Emergent excitation continua in frustrated magnets are a fingerprint of fractionalization, characteristic of quantum spin-liquid states. Recent evidence from Raman scattering for a…
Finite-momentum energy dynamics in a Kitaev magnet
Alexandros Metavitsiadis, Wolfram Brenig
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…
Flux mobility delocalization in the Kitaev spin ladder
Alexandros Metavitsiadis, Wolfram Brenig
We study the Kitaev spin- ladder, a model which exhibits self-localization due to fractionalization caused by exchange frustration. When a weak magnetic field is applied, the…
Enhancement of magnetization plateaus in low dimensional spin systems
Alexandros Metavitsiadis, Christina Psaroudaki, Wolfram Brenig
We study the low-energy properties and, in particular, the magnetization process of a spin-1/2 Heisenberg sawtooth and frustrated chain (also known as zig-zag ladder) wit…
Phonon renormalization in the Kitaev quantum spin liquid
Alexandros Metavitsiadis, Wolfram Brenig
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…
Magnetization process of atacamite: a case of weakly coupled sawtooth chains
L. Heinze, H. O. Jeschke, I. I. Mazin +17
We present a combined experimental and theoretical study of the mineral atacamite CuCl(OH). Density functional theory yields a Hamiltonian describing anisotropic sawtooth c…
Heat transport in the anisotropic Kitaev spin liquid
Angelo Pidatella, Alexandros Metavitsiadis, Wolfram Brenig
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 gapp…
Spin liquid fingerprints in the thermal transport of a Kitaev-Heisenberg ladder
Alexandros Metavitsiadis, Christina Psaroudaki, Wolfram Brenig
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 mod…
Ground-state phase diagram of the frustrated spin-1/2 two-leg honeycomb ladder
Qiang Luo, Shijie Hu, Jize Zhao +3
We investigate a spin- two-leg honeycomb ladder with frustrating next-nearest-neighbor (NNN) coupling along the legs, which is equivalent to two - spin chains couple…
Thermal transport in a two-dimensional spin liquid
Alexandros Metavitsiadis, Angelo Pidatella, Wolfram Brenig
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 inten…
Competing phases in spin ladders with ring exchange and frustration
Alexandros Metavitsiadis, Sebastian Eggert
The ground state properties of spin-1/2 ladders are studied, emphasizing the role of frustration and ring exchange coupling. We present a unified field theory for ladders with gene…
Thermal Transport in a one-dimensional Z Spin Liquid
Alexandros Metavitsiadis, Wolfram Brenig
We study the dynamical thermal conductivity of the Kitaev spin model on a two-leg ladder. In contrast to conventional integrable one-dimensional spin systems, we show that heat tra…
Spin liquid versus dimer phases in an anisotropic J1-J2 frustrated square antiferromagnet
Alexandros Metavitsiadis, Daniel Sellmann, Sebastian Eggert
The spin-1/2 J1-J2 antiferromagnet is a prototypical model for frustrated magnetism and one possible candidate for a realization of a spin liquid phase. The generalization of this…
Impurity entanglement through electron scattering in a magnetic field
Alexandros Metavitsiadis, Raoul Dillenschneider, Sebastian Eggert
We study the entanglement of magnetic impurities in an environment of electrons through successive scattering while an external magnetic field is applied. We show that the dynamics…
Transport properties of a spin-1/2 Heisenberg chain with an embedded spin-S impurity
A. Metavitsiadis
The finite temperature transport properties of a spin-1/2 anisotropic Heisenberg chain with an embedded spin-S impurity are studied. Using primarily numerical diagonalization techn…
Thermal transport in a spin-1/2 Heisenberg chain coupled to a (non) magnetic impurity
A. Metavitsiadis, X. Zotos, O. S. Barišić +1
We explore the effect of a (non) magnetic impurity on the thermal transport of the spin-1/2 Heisenberg chain model. This unique system allows to probe Kondo-type phenomena in a pro…
Incoherent transport induced by a single static impurity in a Heisenberg chain
O. S. Barisic, P. Prelovsek, A. Metavitsiadis +1
The effect of a single static impurity on the many-body states and on the spin and thermal transport in the one-dimensional anisotropic Heisenberg chain at finite temperatures is s…
Finite temperature transport in disordered Heisenberg chains
A. Karahalios, A. Metavitsiadis, X. Zotos +2
Using numerical diagonalization techniques, we explore the effect of local and bond disorder on the finite temperature spin and thermal conductivities of the one dimensional anisot…