66 citations · 223 across the 13 of their papers we have counts for
13 papers
Ground State Properties of the Doped Kitaev-Heisenberg Chain: Topological Superconducting and Mott Insulating Phases Driven by Magnetic Frustration
Cliò Efthimia Agrapidis, Satoshi Nishimoto
We study the hole-doped Kitaev-Heisenberg chain using the density-matrix renormalization group. In the Kitaev-only limit, the bond-directional exchange itself promotes pairing, fav…
Self-organised magnon condensation in quasi-1D edge-shared cuprates without external fields
Cliò Efthimia Agrapidis, Stefan-Ludwig Drechsler, Satoshi Nishimoto
Multimagnon bound states were predicted nearly a century ago and have since been a key topic in condensed matter physics due to their intriguing quantum properties. However, their…
Existence of two distinct valence bond solid states in the dimerized frustrated ferromagnetic -- chain
Jędrzej Wardyn, Satoshi Nishimoto, Cliò Efthimia Agrapidis
We study the frustrated and dimerized ferromagnetic-antiferromagnetic -- chain using the density-matrix renormalization group (DMRG) method. Based on numerical calc…
Rare collapse of fermionic quasiparticles upon coupling to local bosons
Piotr Wrzosek, Adam Kłosiński, Krzysztof Wohlfeld +1
We study the stability of the fermionic quasiparticle in a fermion-boson model on a Bethe lattice, with fermions interacting with local bosons via a polaronic-type coupling. We sol…
Topology of chalcogen chains
Adam Kłosiński, Wojciech Brzezicki, Alexander Lau +4
We investigate the topological properties of the helical atomic chains occurring in elemental selenium and tellurium. We postulate a realistic model that includes spin-orbit intera…
Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
Wenliang Zhang, Cliò Efthimia Agrapidis, Yi Tseng +7
The nature of the spin excitations in superconducting cuprates is a key question toward a unified understanding of the cuprate physics from long-range antiferromagnetism to superco…
The fate of the spin polaron in the 1D antiferromagnets
Piotr Wrzosek, Adam Kosinski, Yao Wang +3
The stability of the spin polaron quasiparticle, well established in studies of a single hole in the 2D antiferromagnets, is investigated in the 1D antiferromagnets using a t-J mod…
Limited ferromagnetic interactions in monolayers of MPS (M=Mn, Ni)
Carmine Autieri, Giuseppe Cuono, Canio Noce +5
We present a systematic study of the electronic and magnetic properties of two-dimensional ordered alloys, consisting of two representative hosts (MnPS and NiPS) of transit…
Field-induced incommensurate ordering in the Heisenberg chains coupled by Ising interaction: Model for the ytterbium aluminum perovskite YbAlO
Cliò Efthimia Agrapidis, Jeroen van den Brink, Satoshi Nishimoto
We study isotropic antiferromagnetic Heisenberg chains coupled by antiferromagnetic Ising interaction as an effective spin model for the ytterbium aluminum perovskite YbAlO. Us…
Ground state and low-energy excitations of the Kitaev-Heisenberg ladder
Cliò Efthimia Agrapidis, Jeroen van den Brink, Satoshi Nishimoto
We study the ground state and low-lying excited states of the Kitaev-Heisenberg model on a ladder geometry using the density matrix renormalization group and Lanczos exact diagonal…
Coexistence of valence-bond formation and topological order in the Frustrated Ferromagnetic - Chain
Cliò Efthimia Agrapidis, Stefan-Ludwig Drechsler, Jeroen van den Brink +1
Frustrated one-dimensional (1D) magnets are known as ideal playgrounds for new exotic quantum phenomena to emerge. We consider an elementary frustrated 1D system: the spin-$\frac{1…
Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb
Cliò Efthimia Agrapidis, Jeroen van den Brink, Satoshi Nishimoto
We study the ground state of the 1D Kitaev-Heisenberg (KH) model using the density-matrix renormalization group and Lanczos exact diagonalization methods. We obtain a rich ground-s…
Cross-over from an incommensurate singlet spiral state with a vanishingly small spin-gap to a valence bond solid state in dimerized frustrated ferromagnetic spin-chains
Cliò Efthimia Agrapidis, Stefan-Ludwig Drechsler, Jeroen van den Brink +1
Motivated by the magnetic properties of the spin-chain compounds LiCuSbOLiSbCuO and RbCuMoO, we study the ground state of the Heisenberg chain wi…