Phase diagram of the Shastry-Sutherland Kondo lattice model with classical localized spins: a variational calculation study

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Munir Shahzad, Pinaki Sengupta

Abstract

We study the Shastry-Sutherland Kondo lattice model with additional Dzyaloshinskii-Moriya (DM) interactions, exploring the possible magnetic phases in its multi-dimensional parameter space. Treating the local moments as classical spins and using a variational ansatz, we identify the parameter ranges over which various common magnetic orderings are potentially stabilized. Our results reveal that the competing interactions result in a heightened susceptibility towards a wide range of spin configurations including longitudinal ferromagnetic and antiferromagnetic order, coplanar flux configurations and most interestingly, multiple non-coplanar configurations including a novel canted-flux state as the different Hamiltonian parameters like electron density, interaction strengths and degree of frustration are varied. The non-coplanar and non-collinear magnetic ordering of localized spins behave like emergent electromagnetic fields and drive unusual transport and electronic phenomena.

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Citations

May 5, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M NaritsukaY Matsuda

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