Various regimes of quantum behavior in S = 1/2 Heisenberg antiferromagnetic chain with fourfold periodicity

Abstract

We have succeeded in synthesizing single crystals of the verdazyl radical beta-2,6-Cl2-V [= beta-3-(2,6-dichlorophenyl)-1,5-diphenylverdazyl]. The ab initio MO calculation indicated the formation of an S = 1/2 Heisenberg antiferromagnetic chain with four-fold magnetic periodicity consisting of three types of exchange interactions.We have successfully explained the magnetic and thermodynamic properties based on the expected spin model by using the quantum Monte Carlo method. Furthermore, we revealed that the alternating and unique Ising ferromagnetic chains become effective in the specific field regions and observed a cooperative phenomenon caused by the magnetic order and quantum fluctuations. These results demonstrate that verdazyl radical could form unconventional spin model with interesting quantum behavior and provide a new way to study a variety of quantum spin systems.

14 pages, 5 figures

References in corpus (2)

• The ALPS project release 1.3: open source software for strongly correlated systems
• Universal temperature dependence of the magnetization of gapped spin chains

Cited by in corpus (15)

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• Fine-Tuning of Magnetic Interactions in Organic Spin Ladders
• $S$ = 1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain in a zinc-verdazyl complex
• Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy
• Anomalous magnetization of $S$=2 ferromagnetic-antiferromagnetic alternating chain with Ising anisotropy
• Gapped ground state in a spin-1/2 frustrated square lattice
• Exact dimer phase with anisotropic interaction for one dimensional magnets
• Field-induced quantum magnetism in the verdazyl-based charge-transfer salt $[$$o$-MePy-V-($p$-Br)${}_2]$FeCl${}_4$
• Quasi-one-dimensional Bose-Einstein Condensation in the Spin-1/2 Ferromagnetic-leg Ladder 3-I-V
• Magnetic properties of a spin-1/2 octagonal lattice
• Field-induced quantum phase in a frustrated zigzag-square lattice
• Realization of a triangular spin necklace in a verdazyl-based Ni complex
• Gapless behavior in a two-leg spin ladder with bond randomness
• Quantum phase with spontaneous translational symmetry breaking in an extended diamond chain
• Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy