100 citations · 351 across the 15 of their papers we have counts for
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Infrared properties of two-dimensional nonlinear models at nonzero angles
Philippe Lecheminant, Yuya Tanizaki, Keisuke Totsuka
A general strategy is proposed to explore the low-energy properties of two-dimensional nonlinear models with terms. We demonstrate its application to nonlinear models w…
Non-Landau quantum phase transition in modulated SU(N) Heisenberg spin chains
Sylvain Capponi, Lukas Devos, Philippe Lecheminant +2
We investigate the nature of the quantum phase transition in modulated SU(N) Heisenberg spin chains. In the odd-N case, the transition separates a trivial non-degenerate phase to a…
Lieb-Schultz-Mattis constraints for the insulating phases of the one-dimensional SU() Kondo lattice model
Philippe Lecheminant, Keisuke Totsuka
The nature of the insulating phases of the SU()-generalization of the one-dimensional Kondo lattice model is investigated by means of non-perturbative approaches. By extending t…
Emergent spin-gapped magnetization plateaus in a spin-1/2 perfect kagome antiferromagnet
S. Suetsugu, T. Asaba, Y. Kasahara +7
The two-dimensional (2D) spin-1/2 kagome Heisenberg antiferromagnet is believed to host quantum spin liquid (QSL) states with no magnetic order, but its ground state remains largel…
Symmetry-protected topological phases in two-leg SU(N) spin ladder with unequal spins
Sylvain Capponi, Pierre Fromholz, Philippe Lecheminant +1
Chiral Haldane phases are examples of one-dimensional topological states of matter which are protected by projective SU() group (or its subgroup $\mathbb{Z}_N \times \mathbb{Z}_…
Phase diagrams of one-dimensional half-filled two-orbital SU(N) cold fermions systems
V. Bois, S. Capponi, P. Lecheminant +2
We investigate possible realizations of exotic SU(N) symmetry-protected topological (SPT) phases with alkaline-earth cold fermionic atoms loaded into one-dimensional optical lattic…
Symmetry-protected topological phases of alkaline-earth cold fermionic atoms in one dimension
H. Nonne, M. Moliner, S. Capponi +2
We investigate the existence of symmetry-protected topological phases in one-dimensional alkaline-earth cold fermionic atoms with general half-integer nuclear spin I at half fillin…
Semiclassical Approach to Competing Orders in Two-leg Spin Ladder with Ring-Exchange
K. Totsuka, P. Lecheminant, S. Capponi
We investigate the competition between different orders in the two-leg spin ladder with a ring-exchange interaction by means of a bosonic approach. The latter is defined in terms o…
Dilute-Bose-Gas Approach to ground state phases of 3D quantum helimagnets under high magnetic field
H. T. Ueda, K. Totsuka, T. Momoi
We study high-field phase diagram and low-energy excitations of three-dimensional quantum helimagnets. Slightly below the saturation field, the emergence of magnetic order may be m…
Magnon BEC and various phases of 3D quantum helimagnets under high magnetic field
H. T. Ueda, K. Totsuka
We study high-field phase diagram and low-energy excitations of three-dimensional quantum helimagnets. Slightly below the saturation field, the emergence of magnetic order may be v…
Magnetization plateaus as insulator-superfluid transitions in quantum spin systems
Tsutomu Momoi, Keisuke Totsuka
We study the magnetization process in two-dimensional S=1/2 spin systems, to discuss the appearance of a plateau structure. The following three cases are considered: (1) the Heisen…