Pinwheel valence-bond solid and triplet excitations in the two-dimensional deformed kagome lattice

K. Matan, T. Ono, Y. Fukumoto, T. J. Sato, J. Yamaura, M. Yano, K. Morita, H. Tanaka

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)

Abstract

Determining ground states of correlated electron systems is fundamental to understanding unusual 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 1 , potentially prompting the emergence of quantum spin states, such as resonating valence bond 2-7 and valence-bond solid 8-11 (VBS). Although theoretically proposed to exist in a kagome lattice-one of the most highly frustrated lattices in two dimensions 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 Rb 2 Cu 3 SnF 12 (refs 12, 13). In this system, a lattice distortion breaks the translational symmetry of the ideal kagome lattice and stabilizes the VBS state.

Original languageEnglish
Pages (from-to)865-869
Number of pages5
JournalNature Physics
Volume6
Issue number11
DOIs
Publication statusPublished - 2010 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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