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Low-energy Excitations In Quantum Spin Liquids Identified By Optical Spectroscopy

Title: Low-energy Excitations In Quantum Spin Liquids Identified By Optical Spectroscopy.
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Name(s): Pustogow, A., author
Saito, Y., author
Zhukova, E., author
Gorshunov, B., author
Kato, R., author
Lee, T.-H., author
Fratini, S., author
Dobrosavljevic, V., author
Dressel, M., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-08-03
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The electrodynamic response of organic spin liquids with highly frustrated triangular lattices has been measured in a wide energy range. While the overall optical spectra of these Mott insulators are governed by transitions between the Hubbard bands, distinct in-gap excitations can be identified at low temperatures and frequencies, which we attribute to the quantum-spin-liquid state. For the strongly correlated ss'-EtMe3Sb[Pd(dmit)(2)](2), we discover enhanced conductivity below 175 cm(-1), comparable to the energy of the magnetic coupling J approximate to 250 K. For omega -> 0, these low-frequency excitations vanish faster than the charge-carrier response subject to Mott-Hubbard correlations, resulting in a dome-shaped band peaked at 100 cm(-1). Possible relations to spinons, magnons, and disorder are discussed.
Identifier: FSU_libsubv1_wos_000440724200014 (IID), 10.1103/PhysRevLett.121.056402 (DOI)
Keywords: state, candidate, kagome antiferromagnet
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevLett.121.056402
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000440724200014
Owner Institution: FSU
Is Part Of: Physical Review Letters.
0031-9007
Issue: iss. 5, vol. 121

Choose the citation style.
Pustogow, A., Saito, Y., Zhukova, E., Gorshunov, B., Kato, R., Lee, T. -H., … Dressel, M. (2018). Low-energy Excitations In Quantum Spin Liquids Identified By Optical Spectroscopy. Physical Review Letters. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000440724200014