Yoshihiro Nishiyama. XY-VBS phase boundary for the square-lattice $$J_1$$-$$J_2$$ XXZ model with the ring exchange. The European Physical Journal B. 2024. 97. 10
Yoshihiro Nishiyama. Transverse-field XY spin chain with the competing long-range interactions: multi-criticality around the XX-symmetric point. Journal of Statistical Mechanics: Theory and Experiment. 2023. 2023. 8. 083102-083102
Yoshihiro Nishiyama. End-point singularity of the XY-paramagnetic phase boundary for the $$(2+1)$$D $$S=1$$ square-lattice $$J_1$$-$$J_2$$ XY model with the single-ion anisotropy. The European Physical Journal B. 2023. 96. 7
Yoshihiro Nishiyama. Criticality of the excess energy cost due to the unit-flux-quantum external field for the (2 + 1)D superfluid-insulator transition. Journal of Statistical Mechanics: Theory and Experiment. 2022. 2022. 3. 033102-033102
Yoshihiro Nishiyama. Fidelity-mediated analysis of the transverse-field XY chain with the long-range interactions: anisotropy-driven multi-criticality. The European Physical Journal B. 2021. 94. 11