Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite

Author(s)
Lee, Young S.; Han, Tianheng; Chu, Shaoyan; Mendels, Philippe; Röder, Jens; ... Show more
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Abstract
We present a Raman spectroscopic investigation of the herbertsmithite ZnCu[subscript 3](OH)[subscript 6]Cl[subscript 2], a realization of a Heisenberg s=1/2 antiferromagnet on a perfect kagome lattice. Focusing on its magnetic excitation spectrum we find two components, a high-temperature quasielastic signal and a low temperature, broad maximum. The latter has a linear low-energy slope and extends to high energy. We have investigated the temperature dependence and symmetry properties of both signals. Our data agree with previous calculations and point to a gapless spin liquid ground state.
Date issued
2010-10
URI
http://hdl.handle.net/1721.1/61330
Department
MIT Materials Research Laboratory; Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review B
Publisher
American Physical Society
Citation
Wulferding, Dirk et al. “Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite.” Physical Review B 82.14 (2010): 144412.© 2010 The American Physical Society.
Version: Final published version
ISSN
1098-0121
1550-235X
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