One-Dimensional Quantum Magnetism in the S = 1/2 Mo(V) system, KMoOP2O7

Abstract

We present a comprehensive experimental and ab-initio study of the $S=1/2$ Mo${}^{5+}$ system, KMoOP${}_2$O${}_7$, and show that it realizes the $S=1/2$ Heisenberg chain antiferromagnet model. Powder neutron diffraction reveals that KMoOP${}_2$O${}_7$ forms a magnetic network comprised of pairs of Mo${}^{5+}$ chains within its monoclinic $P{2}_1/n$ structure. Antiferromagnetic interactions within the Mo${}^{5+}$ chains are identified through magnetometry measurements and confirmed by analysis of the magnetic specific heat. The latter reveals a broad feature centred on $T_{\text{N}}=0.54$ K, which we ascribe to the onset of long-range antiferromagnetic order. No magnetic Bragg scattering is observed in powder neutron diffraction data collected at 0.05 K, however, which is consistent with a strongly suppressed ordered moment with an upper limit ${\mu }_{\text{ord}}<0.15{\mu }_{\text{B}}$. The one-dimensional character of the magnetic correlations in KMoOP${}_2$O${}_7$ is verified through analysis of inelastic neutron scattering data, resulting in a model with $J_{\text{1}}\approx 34$ K and $J_{\text{2}}\approx -2$ K for the intrachain and interchain exchange interactions, respectively. The origin of these experimental findings are addressed through density-functional theory calculations.

10 pages, 7 figures

References in corpus (9)

• Non-Abelian Anyons and Topological Quantum Computation
• Spinons and triplons in spatially anisotropic frustrated antiferromagnets
• Fractional charge and fractional statistics in the quantum Hall effects
• Spinon Confinement in the One-Dimensional Ising-Like Antiferromagnet SrCo2V2O8
• From Spin Glass to Quantum Spin Liquid Ground States in Molybdate Pyrochlores
• Quantum spin chains with frustration due to Dzyaloshinskii-Moriya interactions
• $J_1-J_2$ Square-Lattice Heisenberg Antiferromagnets with 4$d^1$ spins: AMoOPO${}_4$Cl (A = K, Rb)
• Large Easy Axis Anisotropy in the One-Dimensional Magnet BaMo(PO${}_4$)${}_2$
• Hydrodynamics of interacting spinons in the magnetized spin-$1/2$ chain with the uniform Dzyaloshinskii-Moriya interaction

Cited by in corpus (1)

• One-dimensional magnetism in synthetic Pauflerite, $\beta$-VOSO${}_4$