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

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. Here 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.

Authors:
 [1];  [1];  [2];  [2];  [2];  [3];  [1]
+ Show Author Affiliations
  1. Johns Hopkins Univ., Baltimore, MD (United States). Inst. for Quantum Matter and the Dept. of Physics and Astronomy
  2. Inst. of Problems of Chemical Physics, Chernogolovka (Russia)
  3. National Science Foundation (NSF), Arlington, VA (United States). Division of Materials Research; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National High Magnetic Field Laboratory (NHMFL)
OSTI Identifier:
1484855
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Crystals
Additional Journal Information:
Journal Volume: 8; Journal Issue: 6; Journal ID: ISSN 2073-4352
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BEDT-TTF; Raman scattering; spin liquid

Citation Formats

Hassan, Nora, Cunningham, Streit, Zhilyaeva, Elena I., Torunova, Svetlana A., Lyubovskaya, Rimma N., Schlueter, John A., and Drichko, Natalia. Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators. United States: N. p., 2018. Web. doi:10.3390/cryst8060233.
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Hassan, Nora, Cunningham, Streit, Zhilyaeva, Elena I., Torunova, Svetlana A., Lyubovskaya, Rimma N., Schlueter, John A., & Drichko, Natalia. Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators. United States. https://doi.org/10.3390/cryst8060233
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Hassan, Nora, Cunningham, Streit, Zhilyaeva, Elena I., Torunova, Svetlana A., Lyubovskaya, Rimma N., Schlueter, John A., and Drichko, Natalia. Wed . "Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators". United States. https://doi.org/10.3390/cryst8060233. https://www.osti.gov/servlets/purl/1484855.
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@article{osti_1484855,
title = {Raman Scattering as a Probe of the Magnetic State of BEDT-TTF Based Mott Insulators},
author = {Hassan, Nora and Cunningham, Streit and Zhilyaeva, Elena I. and Torunova, Svetlana A. and Lyubovskaya, Rimma N. and Schlueter, John A. and Drichko, Natalia},
abstractNote = {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. Here 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.},
doi = {10.3390/cryst8060233},
journal = {Crystals},
number = 6,
volume = 8,
place = {United States},
year = {2018},
month = {5}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.3390/cryst8060233
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Cited by: 3 works
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Figures / Tables:

Figure-1 Figure-1: (a) A scheme of excitation of pairs of magnons in an antiferromagnetic chain; (b) A schematic view of a structure of BEDT-TTF-layer of a κ-phase crystal as a model of S = 1/2 sites on a frustrated square lattice.
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