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Pressure-induced phase transition, metallization and superconductivity in ZrS2
1Key Laboratory of Automobile Materials of MOE, State Key Laboratory of Superhard Materials, and Department of Materials Science, Jilin University, Changchun 130012, China. liquan777@jlu.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|September 8, 2018
Summary
Pressure transforms zirconium disulfide (ZrS2) from a semiconductor to a metal, revealing superconducting properties. These findings highlight pressure
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Zirconium disulfide (ZrS2) is a layered material with notable electronic and vibrational properties.
- Potential applications exist in photovoltaics and single-layer transistors.
Purpose of the Study:
- Investigate the impact of pressure on ZrS2's structural stability, phonon dispersion, electronic properties, and electron-phonon coupling.
- Understand pressure-induced phase transitions and their effects on ZrS2's electronic behavior.
Main Methods:
- Utilized first-principles calculations to simulate and analyze ZrS2 under varying pressure conditions.
- Examined structural, electronic, and vibrational properties through computational modeling.
Main Results:
- Identified multiple pressure-induced phase transformations in ZrS2, including transitions to monoclinic, orthorhombic, and tetragonal structures.
- Observed a transition from a narrow-gap semiconductor to a metallic state above 5.6 GPa.
- Discovered pressure-driven evolution of the Fermi surface and identified superconducting states in metallic phases.
Conclusions:
- Pressure effectively modulates the bonding, crystal structure, and electronic properties of ZrS2.
- The study suggests potential for high-pressure conductive applications and stimulates further experimental research.
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