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Crystals 2018, 8(6), 233;

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

The Institute for Quantum Matter and the Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
Institute of Problems of Chemical Physics, 142432 Chernogolovka, Russia
Division of Materials Research, National Science Foundation, Arlington, VA 22230, USA
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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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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