Electronic and magnetic ground state of 4$d^3$ double perovskite ruthenates A${}_2$LaRuO${}_6$ (A $=$ Ca, Sr, Ba)

Abstract

4$d$ transition metal oxide (TMO) offers an intriguing puzzle for their electronic and magnetic ground state. They are in the cross-over regime of strong spin orbit interaction (SOI) and electron-electron correlation ($U$) with quenched orbital angular momentum. Our work unravels the electronic and magnetic ground state of the less investigated 4$d^3$ double perovskite ruthenates A${}_2$LaRuO${}_6$ (A = Ca, Ba). The negligible effect of SOI is evident from the bulk magnetic, specific heat measurements and density functional theory (DFT) calculations, indicating a classical spin-only magnetic ground state ($S$ = 3/2) for the materials. Magnetization measurements show that both materials have long range antiferromagnetic order with high degree of magnetic frustration ($f$ $\approx$13 -15). Interestingly, a near $T^2$- behavior is observed in low-$T$ magnetic heat capacity measurement, indicating the presence of low-dimensional spin-wave exciation and magnetic frustration in both materials. The temperature dependent resistivity measurements and electronic band structure calculations confirm a conventional Mott insulating ground state in these two systems. Moreover, our experimental investigation and DFT calculations highlight the reason for the nonexistence of Sr${}_2$LaRuO${}_6$.

arXiv comment11 pages, 12 figures, 5 tables

References in corpus (31)

• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Correlated quantum phenomena in the strong spin-orbit regime
• Predicting the Spin-Lattice Order of Frustrated Systems from First-Principles
• Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
• Observation of a $d$-wave gap in electron-doped Sr${}_2$IrO${}_4$
• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Spin-orbit coupling in $d^2$ ordered double perovskites
• Signature of high temperature superconductivity in electron doped Sr2IrO4
• Valence bond glass on an fcc lattice in the double perovskite Ba2YMoO6
• Gapless spin liquids on the three dimensional hyper-kagome lattice of Na${}_4$Ir${}_3$O${}_8$
• Universality of pseudogap and emergent order in lightly doped Mott insulators
• Charge density waves in cuprate superconductors beyond the critical doping
• Ab-inito study of low temperature magnetic properties of double perovskite Sr2FeOsO6
• Octupolar order in d-orbital Mott insulators
• Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6
• Electronic Structure and Exchange Interactions of Na${}_2$V${}_3$O${}_7$
• Effect of Spin-Orbit Interaction on (4d)^3- and (5d)^3 -Based Transition-Metal Oxides
• Li${}_2$RhO${}_3$: A spin-glassy relativistic Mott insulator
• Frustration by competing interactions in the highly-distorted double perovskites La2NaB'O6 (B' = Ru, Os)
• Spin-orbit coupling controlled $J=3/2$ electronic ground state in 5$d^3$ oxides
• Persistent low-temperature spin dynamics in the mixed-valence iridate Ba${}_3$InIr${}_2$O${}_9$
• Ab Initio Calculation of Spin Gap Behavior in CaV4O9
• Highly-anisotropic exchange interactions of $j_{\mathrm{eff}}=1/2$ iridium moments on the fcc lattice in La${}_{2}B$IrO${}_6$ ($B$ $=$ Mg, Zn)
• Local Magnetism and Spin Dynamics of the Frustrated Honeycomb Rhodate Li2RhO3
• Active role of the nonmagnetic cations in magnetic interactions for the double-perovskite Sr2BOsO6 (B=Y, In, Sc)
• Spin Gap and the Nature of the 4d3 Magnetic Ground State in the Frustrated FCC Antiferromagnet Ba2YRuO6
• Revealing the Hidden Heavy Fermi Liquid in CaRuO3
• Uniaxial pressure induced half-metallic ferromagnetic phase transition in LaMnO${}_3$
• Multipolar interactions and magnetic excitation gap in d${}^3$ spin-orbit Mott insulators
• $J_{eff}$ states in a quasi one dimensional antiferromagnetic spin chain hexagonal Iridates Sr${}_3$MIrO${}_6$ (M=Mg, Zn, Cd): an $ab-initio$ comparative perspective
• The nature of low-temperature spin-freezing in frustrated Kitaev magnets