126 citations · 208 across the 7 of their papers we have counts for
8 papers
Magnetic excitations of the strongly-anisotropic triangular XXZ model: a projected spin-product state approach
Achille Mauri, Frédéric Mila
Recent experiments have sparked interest on the ground-state properties and on the excitation spectrum of the spin- triangular XXZ model with strong Ising-like anisotropy. In…
Confinement, deconfinement, and bound states in the spin- and spin- 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 , next-nearest-neighbor , and three-site interactions u…
Excitations and dynamical structure factor of spin- and spin- Heisenberg spin chains
Aman Sharma, Mithilesh Nayak, Natalia Chepiga +1
We study the dynamical structure factor of the frustrated spin- - Heisenberg chains, with particular focus on the partially dimerized phase that emerges between two…
Bound states and deconfined spinons in the dynamical structure factor of the spin-1 chain
Aman Sharma, Mithilesh Nayak, Henrik M. Rønnow +1
Using a time-dependent density matrix renormalization group approach, we study the dynamical structure factor of the spin-1 chain. As increases, the magnon mode d…
Slow convergence of spin-wave expansion and magnon dispersion in the 1/3 plateau of the triangular XXZ antiferromagnet
Achille Mauri, Frédéric Mila
Motivated by recent experiments on the quantum magnet KCo(SeO), we study theoretically the excitation spectrum of the nearest-neighbour triangular XXZ model in th…
A quantum magnetic analogue to the critical point of water
J. Larrea Jiménez, S. P. G. Crone, E. Fogh +13
At the familiar liquid-gas phase transition in water, the density jumps discontinuously at atmospheric pressure, but the line of these first-order transitions defined by increasing…
Strong-coupling expansion and effective hamiltonians
F. Mila, K. P. Schmidt
When looking for analytical approaches to treat frustrated quantum magnets, it is often very useful to start from a limit where the ground state is highly degenerate. This chapter…
Wannier functions and exchange integrals: The example of LiCuO
V. V. Mazurenko, S. L. Skornyakov, A. V. Kozhevnikov +2
Starting from a single band Hubbard model in the Wannier function basis, we revisit the problem of the ligand contribution to exchange and derive explicit formulae for the exchange…