Pinwheel VBS state and triplet excitations in the two-dimensional deformed kagome lattice

Abstract

Determining ground states of correlated electron systems is fundamental to understanding novel phenomena in condensed matter physics. A difficulty, however, arises in a geometrically frustrated system in which the incompatibility between the global topology of an underlying lattice and local spin interactions gives rise to macroscopically degenerate ground states, potentially prompting the emergence of quantum spin states, such as resonating valence bond (RVB) and valence bond solid (VBS). Although theoretically proposed to exist in a kagome lattice -- one of the most highly frustrated lattices in two dimensions (2D) being comprised of corner-sharing triangles -- such quantum-fluctuation-induced states have not been observed experimentally. Here we report the first realization of the "pinwheel" VBS ground state in the S=1/2 deformed kagome lattice antiferromagnet Rb2Cu3SnF12. In this system, a lattice distortion breaks the translational symmetry of the ideal kagome lattice and stabilizes the VBS state.

10 pages, 4 figures and Supplemental Information

References in corpus (7)

• Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
• Projected wavefunction study of Spin-1/2 Heisenberg model on the Kagome lattice
• Quantum magnetism in the paratacamite family: towards an ideal kagome lattice
• Ground State of the Kagome Lattice Heisenberg Antiferromagnet
• Quantum phase transition induced by Dzyaloshinskii-Moriya in the kagome antiferromagnet
• Singlet Ground State and Spin Gap in S=1/2 Kagome Antiferromagnet Rb${}_2$Cu${}_3$SnF${}_{12}$
• Spin Triplet Excitations for a Valence Bond Solid on the Kagome Lattice

Cited by in corpus (32)

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• Quantum Selection of Order in an $XXZ$ Antiferromagnet on a Kagomé Lattice
• Dzyaloshinskii-Moriya interaction and spin re-orientation transition in the frustrated kagome lattice antiferromagnet
• Possible Dirac quantum spin liquid in a kagome quantum antiferromagnet YCu${}_3$(OH)${}_6$Br${}_2$[Br${}_x$(OH)${}_{1-x}$]
• Phase diagram of a distorted kagome antiferromagnet and application to Y-kapellasite
• Emergence of spin singlets with inhomogeneous gaps in the kagome Heisenberg antiferromagnets Zn-barlowite and herbertsmithite
• Finite-temperature properties of the Kitaev-Heisenberg models on kagome and triangular lattices studied by improved finite-temperature Lanczos methods
• Pinch-points to half-moons and up in the stars: the kagome skymap
• Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice
• Kagome-Triangular Lattice Antiferromagnet NaBa2Mn3F11
• Spin-Peierls instability of the U(1) Dirac spin liquid
• From kagome strip to kagome lattice: Realizations of frustrated S=1/2 antiferromagnets in Ti(III) fluorides
• Controlling frustrated magnetism on the kagome lattice by uniaxial-strain tuning
• High-Temperature Series Expansion for Spin-1/2 Heisenberg Models
• Structural phase transitions in the kagome lattice based materials Cs2-xRbxSnCu3F12 (x = 0, 0.5, 1.0, 1.5)
• Structures of magnetic excitations in the spin-1/2 kagome-lattice antiferromagnets Cs${}_2$Cu${}_3$SnF${}_{12}$ and Rb${}_2$Cu${}_3$SnF${}_{12}$
• Valence bond phases of herbertsmithite and related copper kagome materials
• Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of a spin-1/2 deformed kagome lattice antiferromagnet
• Magnetic terahertz resonances above the Néel temperature in the frustrated kagome antiferromagnet averievite
• Pressure induced collapse of magnetic order in jarosite
• Controlling the stoichiometry of the triangular lattice antiferromagnet Li${}_{1+x}$Zn${}_{2-y}$Mo${}_3$O${}_8$
• Breakdown of Linear Spin-wave Theory and Existence of Spinon Bound States in the Frustrated Kagome Lattice Antiferromagnet
• Frustrated magnets and quantum paramagnetic phases at finite temperature
• Spin dynamics and 1/3 magnetization plateau in a coupled distorted diamond chain compound K2Cu3(MoO4)4
• Magnetic properties and field-induced phenomena in the Jeff = 1/2 distorted kagome antiferromagnet
• Effects of exchange distortions in the magnetic Kagome lattice
• Valence-Bond Solid phases in the spin-$1/2$ Kekule-Heisenberg model
• Effects of bond-randomness and Dzyaloshinskii-Moriya interactions on the specific heat at low temperatures of a spherical kagomé cluster in {W${}_{72}$V${}_{30}$}
• Stabilizing Itinerant Electrons in a Corner-Sharing Kagomé Oxide Nd4Os3ZnO14
• The algebraic spin liquid in the SU(6) Heisenberg model on the kagome lattice