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Weak localization and Mott state in two-dimensional Sr3V5S11.

Y Klein1, H Moutaabbid, N Boubiche

  • 1Institut de Minéralogie et de Physique des Milieux Condensés (IMPMC), CNRS UMR 7590, Université Pierre et Marie Curie (UPMC), 4 Place Jussieu, 75252 Paris Cedex 05, France.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|October 9, 2013
PubMed
Summary

We synthesized a new layered compound, Sr3V5S11, under high pressure. This material exhibits quasi-one-dimensional properties and semiconducting behavior, suggesting potential for novel electronic applications.

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Area of Science:

  • Solid State Chemistry
  • Materials Science
  • Crystallography

Background:

  • Layered materials offer unique electronic and magnetic properties.
  • High-pressure synthesis enables access to novel crystal structures and phases.
  • Vanadium sulfides are of interest due to their diverse electronic behaviors.

Purpose of the Study:

  • To synthesize and characterize a new layered strontium vanadium sulfide compound.
  • To investigate the crystal structure and physical properties of Sr3V5S11.
  • To explore the potential for quasi-one-dimensional electronic behavior.

Main Methods:

  • High-pressure and high-temperature synthesis (6 GPa, 1600 °C).
  • Single-crystal X-ray diffraction for structural refinement.
  • Magnetic susceptibility and electrical resistivity measurements.

Main Results:

  • Successful synthesis of single crystals of Sr3V5S11.
  • Determination of a monoclinic crystal structure (C2/c) with layered VS2 units and VS6 octahedra trimers.
  • Observation of mixed vanadium valencies (V4+ and V3+) and quasi-1D V-V distances.
  • Semiconducting-like electrical resistivity (room temperature ~1.2-10 mΩ cm) with a crossover to 1D variable range hopping at low temperatures.
  • Magnetic susceptibility showing a large temperature-independent contribution and a Curie-Weiss term.

Conclusions:

  • Sr3V5S11 is a novel layered compound with a unique crystal structure.
  • The material exhibits characteristics of a correlated quasi-one-dimensional system.
  • The observed electronic properties suggest potential for further research in low-dimensional materials.