@article{oai:repo.qst.go.jp:00048515, author = {Ito, K. and Ykoo, S. and Okamoto, K. and Sakai, T. and Sakai, Toru}, journal = {Polyhedron}, month = {Nov}, note = {We investigate the spin-1/2 twisted three-leg antiferromagnetic quantum spin tube in the presence of the easy-plane anisotropy, using the numerical diagonalization of finite-size clusters. We show cases of the existence and the absence of magnetization plateau at 1/3 height of saturation magnetization when the anisotropy is tuned. The phenomenological-renormalization group analysis indicates a quantum phase transition between the 1/3 magnetization plateau phase and the plateauless one. The phase diagram is also presented.}, pages = {42--44}, title = {Quantum phase transition in the twisted three-leg spin tube}, volume = {136}, year = {2017} }