Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Agrapidis, Cliò Efthimia"'
Understanding the dynamics of magnons in quantum magnetism is a captivating area of condensed matter physics. Magnons exhibit unique collective behaviours, including the formation of multimagnon bound states (MBSs). Predicted by Bethe over 90 years a
Externí odkaz:
http://arxiv.org/abs/2410.00734
Publikováno v:
Phys. Rev. B 108, 205111 (2023)
We study the frustrated and dimerized ferromagnetic-antiferromagnetic $J_1$-$J_1'$-$J_2$ chain using the density-matrix renormalization group (DMRG) method. Based on numerical calculations of the second derivative of energy, spin gap, spin-spin corre
Externí odkaz:
http://arxiv.org/abs/2306.01543
Publikováno v:
Phys. Rev. B 107, 205103 (2023)
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 solve the problem by mapping it onto a non-interacting chain with site-de
Externí odkaz:
http://arxiv.org/abs/2212.11065
Autor:
Zhang, Wenliang, Agrapidis, Cliò Efthimia, Tseng, Yi, Asmara, Teguh Citra, Paris, Eugenio, Strocov, Vladimir N., Giannini, Enrico, Nishimoto, Satoshi, Wohlfeld, Krzysztof, Schmitt, Thorsten
Publikováno v:
npj Quantum Mater. 7, 123 (2022)
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 superconductivity. The intense spin excitations up to the over-doped regime r
Externí odkaz:
http://arxiv.org/abs/2204.08749
Autor:
Autieri, Carmine, Cuono, Giuseppe, Noce, Canio, Rybak, Milosz, Kotur, Kamila M., Agrapidis, Cliò Efthimia, Wohlfeld, Krzysztof, Birowska, Magdalena
Publikováno v:
J. Phys. Chem. C 2022
We present a systematic study of the electronic and magnetic properties of two-dimensional ordered alloys, consisting of two representative hosts (MnPS$_3$ and NiPS$_3$) of transition metal phosphorus trichalcogenides doped with $3d$ elements. For bo
Externí odkaz:
http://arxiv.org/abs/2111.15004
Autor:
Kłosiński, Adam, Oleś, Andrzej Michał, Agrapidis, Cliò Efthimia, van Wezel, Jasper, Wohlfeld, Krzysztof
Publikováno v:
Phys. Rev. B 103, 235123 (2021)
Stimulated by recent works highlighting the indispensable role of Coulomb interactions in the formation of helical chains and chiral electronic order in the elemental chalcogens, we explore the p-orbital Hubbard model on a one-dimensional helical cha
Externí odkaz:
http://arxiv.org/abs/2103.05925
Autor:
Agrapidis, Cliò Efthimia
Magnetic frustration is a phenomenon arising in spin systems when spin interactions cannot all be satisfied at the same time. A typical example of geometric frustration is a triangle with Ising-spins at its vertices and antiferromagnetic interaction.
Externí odkaz:
https://tud.qucosa.de/id/qucosa%3A36334
https://tud.qucosa.de/api/qucosa%3A36334/attachment/ATT-0/
https://tud.qucosa.de/api/qucosa%3A36334/attachment/ATT-0/
Publikováno v:
Phys. Rev. B 99, 224423 (2019)
We study isotropic antiferromagnetic Heisenberg chains coupled by antiferromagnetic Ising interaction as an effective spin model for the ytterbium aluminum perovskite YbAlO$_3$. Using the density-matrix renormalization group (DMRG) method we calculat
Externí odkaz:
http://arxiv.org/abs/1905.01204
Publikováno v:
Phys. Rev. B 99, 224418 (2019)
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 diagonalization methods. The Kitaev and Heisenberg interactions are parametriz
Externí odkaz:
http://arxiv.org/abs/1902.00466
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