Frédéric Mila

collaborators

4 papers

cond-mat.str-el2025

Confinement, deconfinement, and bound states in the spin- $1$ and spin- $3/2$ generalizations of the Majumdar--Ghosh chain

Aman Sharma, Mithilesh Nayak, Natalia Chepiga +2

We investigate the nature of low-energy excitations in a spin chain with antiferrmomagnetic nearest-neighbor $J_{1}$ , next-nearest-neighbor $J_{2}$ , and three-site $J_{3}$ interactions u…

cond-mat.str-el2025

Excitations and dynamical structure factor of $J_{1} - J_{2}$ spin- $3/2$ and spin- $5/2$ Heisenberg spin chains

Aman Sharma, Mithilesh Nayak, Natalia Chepiga +1

We study the dynamical structure factor of the frustrated spin- $3/2$ $J_{1}$ - $J_{2}$ Heisenberg chains, with particular focus on the partially dimerized phase that emerges between two…

cond-mat.str-el2025

Slow convergence of spin-wave expansion and magnon dispersion in the 1/3 plateau of the triangular XXZ antiferromagnet

Motivated by recent experiments on the quantum magnet K $_{2}$ Co(SeO $_{3}$ ) $_{2}$ , we study theoretically the excitation spectrum of the nearest-neighbour triangular XXZ model in th…

cond-mat.str-el2025

Bound states and deconfined spinons in the dynamical structure factor of the $J_{1} - J_{2}$ spin-1 chain

Aman Sharma, Mithilesh Nayak, Henrik M. RÃ¸nnow +1

Using a time-dependent density matrix renormalization group approach, we study the dynamical structure factor of the $J_{1} - J_{2}$ spin-1 chain. As $J_{2}$ increases, the magnon mode d…

Confinement, deconfinement, and bound states in the spin-1 and spin-3/2 generalizations of the Majumdar--Ghosh chain

Excitations and dynamical structure factor of J1​−J2​ spin-3/2 and spin-5/2 Heisenberg spin chains

Slow convergence of spin-wave expansion and magnon dispersion in the 1/3 plateau of the triangular XXZ antiferromagnet

Bound states and deconfined spinons in the dynamical structure factor of the J1​−J2​ spin-1 chain

Confinement, deconfinement, and bound states in the spin- $1$ and spin- $3/2$ generalizations of the Majumdar--Ghosh chain

Excitations and dynamical structure factor of $J_{1} - J_{2}$ spin- $3/2$ and spin- $5/2$ Heisenberg spin chains

Bound states and deconfined spinons in the dynamical structure factor of the $J_{1} - J_{2}$ spin-1 chain