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Updated: Apr 18, 2026
08:12
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
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Two-dimensional mineral [Pb2BiS3][AuTe2]: high-mobility charge carriers in single-atom-thick layers
Lei Fang1, Jino Im, Constantinos C Stoumpos
1†Department of Chemistry, ‡Department of Physics and Astronomy, and §Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|January 23, 2015
Summary
Naturally occurring buckhornite, [Pb2BiS3][AuTe2], hosts two-dimensional (2D) carriers in single-atom-thick layers. This novel 2D semimetal exhibits high carrier mobility and electronic properties similar to graphene.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- Two-dimensional (2D) electronic systems offer unique physical phenomena and technological potential.
- Discovering new 2D materials is crucial for advancing electronic applications.
Purpose of the Study:
- To investigate the electronic properties of the naturally occurring mineral buckhornite, [Pb2BiS3][AuTe2].
- To explore its potential as a platform for novel 2D electronic phenomena.
Main Methods:
- Synthesis of [Pb2BiS3][AuTe2] samples.
- Magneto-transport measurements.
- Theoretical electronic structure calculations.
Main Results:
- [Pb2BiS3][AuTe2] hosts 2D carriers confined to single-atom-thick [AuTe2] layers.
- It is a multiband semimetal with compensated electron-hole densities and high hole mobility (∼1360 cm(2)/(V s)).
- The material exhibits extreme anisotropy (∼10^4) and graphene-like electronic features (linear dispersion, ultrahigh Fermi velocities).
Conclusions:
- Buckhornite, [Pb2BiS3][AuTe2], is a promising new 2D material with unique electronic properties.
- Its structure facilitates the investigation of emergent electronic behaviors in 2D systems.
- Weak interlayer coupling enables easy cleavage for device fabrication.
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