2 papers
cond-mat.str-el2021
Symmetry-protected topological phases and competing orders in a spin-1/2 XXZ ladder with a four-spin interaction
Takuhiro Ogino, Shunsuke Furukawa, Ryui Kaneko +2
We study a spin-1/2 XXZ model with a four-spin interaction on a two-leg ladder. By means of effective field theory and matrix product state calculations, we obtain rich ground-stat…
cond-mat.str-el2020
Continuous phase transition between Neel and valence bond solid phases in a J-Q-like spin ladder system
Takuhiro Ogino, Ryui Kaneko, Satoshi Morita +2
We investigate a quantum phase transition between a Neel phase and a valence bond solid (VBS) phase, in each of which a different Z2 symmetry is broken, in a spin-1/2 two-leg XXZ l…