Progress of Theoretical Physics
Ground-State Phase Diagram of the S=1/2 Distorted Diamond Type Spin Chain with Ferromagnetic Interactions (Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
Kiyomi Okamoto, Takashi Tonegawa, Tsutoshi Yamada, M. Matsumoto, Mikito Koga, Tôru Sakai