Ising phases of Heisenberg ladders in a magnetic field |
| |
Authors: | Penc Karlo Fouet Jean-Baptiste Miyahara Shin Tchernyshyov Oleg Mila Frédéric |
| |
Institution: | Research Institute for Theoretical Solid State Physics and Optics, H-1525 Budapest, P.O.B. 49, Hungary. |
| |
Abstract: | We show that Dzyaloshinskii-Moriya (DM) interactions can substantially modify the phase diagram of spin-1/2 Heisenberg ladders in a magnetic field provided they compete with exchange. For nonfrustrated ladders, they induce a local magnetization along the DM vector that turns the gapless intermediate phase into an Ising phase with broken translational symmetry, while for frustrated ladders, they extend the Ising order of the half-integer plateau to the surrounding gapless phases of the purely Heisenberg case. Implications for experimental ladder and dimer systems are discussed. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|