Quantum phase transitions in a spin-1/2 alternating Heisenberg antiferromagnetic chain under a staggered transverse magnetic field

Abstract

The magnetic behaviors of a spin-1/2 alternating Heisenberg antiferromagnetic chain in a staggered transverse magnetic field is studied by means of the density-matrix renormalization group method and Jordan-Wigner transformation. Quantum phase transitions of different types are observed in the S=1 Neel and XY-like gapless phases, which result from the competitions between the staggered transverse field and magnetic orders induced by anisotropy and alternating interactions. The results are compared with the mean-field and some exactly resolved results.

5 pages, 4 figures, published in Phys. Lett. A, 373,1687

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Cited by in corpus (2)

• Topological chiral and nematic superconductivity by doping Mott insulators on triangular lattice
• Zero-temperature study of a tetrameric spin-$1/2$ chain in a transverse magnetic field