Frustrated spin-1/2 square lattice in the layered perovskite PbVO(3)

Abstract

We report on the magnetic properties of the layered perovskite PbVO(3). The results of magnetic susceptibility and specific heat measurements as well as band structure calculations consistently suggest that the S=1/2 square lattice of vanadium atoms in PbVO(3) is strongly frustrated due to next-nearest-neighbor antiferromagnetic interactions. The ratio of next-nearest-neighbor (J(2)) to nearest-neighbor (J(1)) exchange integrals is estimated to be J(2)/J(1)\approx 0.2-0.4. Thus, PbVO(3) is within or close to the critical region of the J(1)-J(2) frustrated square lattice. Supporting this, no sign of long-range magnetic ordering was found down to 1.8 K.

arXiv comment4 pages, 4 figures, 2 tables

References in corpus (6)

• Li${}_2$VO(Si,Ge)O${}_4$, a prototype of a two-dimensional frustrated quantum Heisenberg antiferromagnet
• New quantum phase transitions in the two-dimensional J1-J2 model
• Exchange interactions and magnetic properties of the layered vanadates CaV2O5, MgV2O5, CaV3O7 and CaV4O9
• Realization of a large J_2 quasi-2D spin-half Heisenberg system: Li2VOSiO4
• Electronic structure and bond competition in the polar magnet PbVO${}_3$
• Theory of magnetic order in the three-dimensional spatially anisotropic Heisenberg model

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