Honeycomb Heisenberg Spin Ladder: Unusual Ground State and Thermodynamic Properties
arXiv:1307.5945 · doi:10.1209/0295-5075/104/57009
Abstract
The unusual ground state and thermodynamic properties of spin-1/2 two-leg honeycomb (HC) spin ladder are systematically studied by jointly utilizing various analytical and numerical methods. The HC spin ladder is found to exhibit behaviors dramatically different from those of the conventional square spin ladder. A strong relevant term nJ and a half saturation magnetization plateau that can be attributed to the formation of diluted dimer states are observed in the HC ladder, both of which are absent in the square ladder. The ground state phase diagram of the HC spin ladder is identified, and the thermodynamic properties of the specific heat and susceptibility for different couplings are thoroughly explored, where two kinds of excitations are unveiled. The distinct Wilson ratios for both spin ladders at the lower critical fields are also obtained. Our calculated result is well fitted to the experimental data of the two-leg HC spin ladder compound [Cu2L1(N3)4]n.
5 pages, 6 figures
References in corpus (11)
- Classical simulation of infinite-size quantum lattice systems in one spatial dimension
- Thermodynamics of the Spin Luttinger-Liquid in a Model Ladder Material
- Quantum state transmission via a spin ladder as a robust data bus
- Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions
- Linearized Tensor Renormalization Group Algorithm for Thermodynamics of Quantum Lattice Models
- Spectral and thermodynamic properties of a strong-leg quantum spin ladder
- Bridging frustrated-spin-chain and spin-ladder physics: quasi-one-dimensional magnetism of BiCu2PO6
- Wilson ratio of a Tomonaga-Luttinger liquid in a spin-1/2 Heisenberg ladder
- Field-induced quantum soliton lattice in a frustrated two-leg spin-1/2 ladder
- Phase Diagrams, Distinct Conformal Anomalies and Thermodynamics of Spin-1 Bond-Alternating Heisenberg Antiferromagnetic Chain in Magnetic Fields
- Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6