Superconductivity in molecular crystals induced by charge injection

Area of Science:

• Materials Science
• Condensed Matter Physics
• Organic Electronics

Background:

• Superconductivity research often advances with new material classes, like layered copper oxides.
• Current superconductors encompass diverse materials, from simple metals to complex organic salts.
• Organic molecular crystals are typically insulators.

Purpose of the Study:

• To introduce a novel class of superconductors based on organic molecular crystals.
• To demonstrate the feasibility of inducing metallic behavior and superconductivity in these materials.
• To explore the potential of organic molecular crystals in superconductivity research.

Main Methods:

• Utilizing charge injection techniques to transform insulating organic molecular crystals into metallic states.
• Investigating pentacene, tetracene, and anthracene as initial candidate materials.
• Measuring transition temperatures to identify superconducting properties.

Main Results:

• Successfully created metallic states in insulating organic molecular crystals via charge injection.
• Identified pentacene, tetracene, and anthracene as the first examples of this new class.
• Observed the highest superconducting transition temperature of 4 K in anthracene.

Conclusions:

• Organic molecular crystals represent a new frontier for superconductivity research.
• Charge injection is a viable method for achieving superconductivity in these materials.
• The vast compositional space of molecular crystals promises further discoveries in organic superconductivity.