Superconductivity in solid benzene molecular crystal

Area of Science:

• Condensed Matter Physics
• Materials Science
• Quantum Chemistry

Background:

• Light-element compounds are theoretically promising for high critical temperature superconductivity.
• Benzene, a hydrogen-rich organic compound, is explored as a potential superconductor.

Purpose of the Study:

• Investigate the electronic structures, dynamics, and electron-phonon interactions of solid benzene under high pressure.
• Determine the potential for superconductivity in benzene and its transition temperature.

Main Methods:

• Utilized first-principles calculations to simulate benzene's properties.
• Analyzed electronic structures, phonon dynamics, and electron-phonon coupling.

Main Results:

• Benzene demonstrates dynamic stability between 180-200 GPa.
• Superconductivity was predicted with a maximum transition temperature of 20 K at 195 GPa.
• Phonon modes of carbon atoms are the primary drivers of electron-phonon interactions.

Conclusions:

• The simplest pristine hydrocarbon, benzene, exhibits superconductivity, aligning with trends in aromatic hydrocarbons.
• This finding bridges the understanding between organic and hydrogen-rich superconductors.