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Crystals 2018, 8(6), 233; https://doi.org/10.3390/cryst8060233

Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators

1
The Institute for Quantum Matter and the Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
2
Institute of Problems of Chemical Physics, 142432 Chernogolovka, Russia
3
Division of Materials Research, National Science Foundation, Arlington, VA 22230, USA
4
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
*
Author to whom correspondence should be addressed.
Received: 14 March 2018 / Revised: 30 April 2018 / Accepted: 16 May 2018 / Published: 23 May 2018
(This article belongs to the Special Issue Advances in Organic Conductors and Superconductors)
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Abstract

Quasi-two-dimensional Mott insulators based on BEDT-TTF molecules have recently demonstrated a variety of exotic states, which originate from electron–electron correlations and geometrical frustration of the lattice. Among those states are a triangular S = 1/2 spin liquid and quantum dipole liquid. In this article, we show the power of Raman scattering technique to characterize magnetic and electronic excitations of these states. Our results demonstrate a distinction between a spectrum of magnetic excitations in a simple Mott insulator with antiferromagnetic interactions, and a spectrum of an insulator with an additional on-site charge degree of freedom. View Full-Text
Keywords: spin liquid; Raman scattering; BEDT-TTF spin liquid; Raman scattering; BEDT-TTF
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Hassan, N.; Cunningham, S.; Zhilyaeva, E.I.; Torunova, S.A.; Lyubovskaya, R.N.; Schlueter, J.A.; Drichko, N. Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators. Crystals 2018, 8, 233.

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