The $S=1$ dimer system K${}_2$Ni(MoO${}_4$)${}_2$: a candidate for magnon Bose-Einstein condensation

Abstract

Dimerized quantum magnets provide a unique possibility to investigate Bose-Einstein condensation of magnetic excitations in crystalline systems at low temperature. Here, we model the low-temperature magnetic properties of the recently synthesized spin $S=1$ dimer system K${}_2$Ni(MoO${}_4$)${}_2$ and propose it as a new candidate material for triplon and quintuplon condensation. Based on a first principles analysis of its electronic structure, we derive an effective spin-dimer model that we first solve within a mean-field approximation to refine its parameters in comparison to experiment. Finally, the model is solved by employing a numerically exact quantum Monte Carlo technique which leads to magnetic properties in good agreement with experimental magnetization and thermodynamic results. We discuss the emergent spin model of K${}_2$Ni(MoO${}_4$)${}_2$ in view of condensation of magnetic excitations in a broad parameter regime. Finally, we comment on a geometrical peculiarity of the proposed model and discuss how it could host a supersolid phase upon structural distortions.

arXiv comment7 pages, 4 figures + supplemental material of 6 pages, 6 figures. Comments are welcome

References in corpus (31)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Maximally localized Wannier functions: Theory and applications
• The ALPS project release 1.3: open source software for strongly correlated systems
• Bose-Einstein Condensation in Magnetic Insulators
• The ALPS project release 2.0: Open source software for strongly correlated systems
• Realization of Bose-Einstein condensation of dilute magnons in TlCuCl${}_3$
• Wien2wannier: From linearized augmented plane waves to maximally localized Wannier functions
• Exact, Complete, and Universal Continuous-Time Worldline Monte Carlo Approach to the Statistics of Discrete Quantum Systems
• Supersolid hardcore bosons on the triangular lattice
• Magnetic Field-Induced Condensation of Triplons in Han Purple Pigment BaCuSi${}_2$O${}_6$
• Supersolid Order from Disorder: Hard-Core Bosons on the Triangular Lattice
• First- principle calculations of magnetic interactions in correlated systems
• Persistent supersolid phase of hard-core bosons on the triangular lattice
• Supersolid phase of hardcore bosons on triangular lattice
• Algebraic Approach to Interacting Quantum Systems
• Field Induced Supersolid Phase in Spin-One Heisenberg Models
• Bose-Einstein Condensation of Triplons in Ba3Cr2O8
• Singlet ground state in the spin-1/2 dimer compound Sr3Cr2O8
• Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet
• Singlet-triplet dispersion reveals additional frustration in the triangular dimer compound Ba${}_3$Mn${}_2$O${}_8$
• Singlet Ground State and Magnetization Plateaus in Ba${}_3$Mn${}_2$O${}_8$
• Asymmetric quintuplet condensation in the frustrated S=1 spin dimer compound Ba3Mn2O8
• Pressure dependence of dynamically screened Coulomb interactions in NiO: Effective Hubbard, Hund, intershell and intersite components
• Ordered magnetic phases of the frustrated spin-dimer compound Ba3Mn2O8
• Specific heat of the $S=1$ spin-dimer antiferromagnet Ba${}_3$Mn${}_2$O${}_8$ in high magnetic fields
• Spin-Triplet Excitons in the $S=1/2$ Gapped Antiferromagnet BaCuSi${}_2$O${}_6$: Electron Paramagnetic Resonance Studies
• Quantum domain walls induce incommensurate supersolid phase on the anisotropic triangular lattice
• Non-local updates for quantum Monte Carlo simulations
• Anisotropic phase diagram of the frustrated spin dimer compound Ba3Mn2O8
• Bose-Einstein condensation of triplons in the S=1 tetramer antiferromagnet K2Ni2(MoO4)3: A compound close to quantum critical point

Cited by in corpus (3)

• Frustration-driven unconventional magnetism in the Mn${}^{2+}$ ($S=\frac{5}{2}$) based two-dimensional triangular-lattice antiferromagnet Ba${}_3$MnTa${}_2$O${}_9$
• Coexistence of static and dynamic local magnetic fields in an S = 3/2 honeycomb lattice antiferromagnet Co2Te3O8
• Quasi-Two-Dimensional Quantum Antiferromagnetism in the Distorted Honeycomb Compound KCuIn(PO4)2