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Superconductivity in alkali-metal-doped picene.
Ryoji Mitsuhashi1, Yuta Suzuki, Yusuke Yamanari
1Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
Nature
|March 6, 2010
Summary
Researchers discovered superconductivity in potassium-intercalated picene (K(x)picene), a solid hydrocarbon. This breakthrough offers promising organic hydrocarbon candidates for achieving higher superconducting transition temperatures (T(c)).
Area of Science:
- Materials Science
- Condensed Matter Physics
- Organic Chemistry
Background:
- Superconducting materials are crucial for scientific advancement and technological applications.
- Recent discoveries include calcium-intercalated graphite, boron-doped diamond, and iron arsenides.
- No new organic superconductor with a high transition temperature (T(c)) has emerged in the last decade.
Purpose of the Study:
- To explore new superconducting material systems.
- To investigate the potential of organic hydrocarbons as superconductors.
- To identify novel organic materials with high superconducting transition temperatures.
Main Methods:
- Intercalation of alkali metals into picene, a solid hydrocarbon.
- Measurement of superconducting transition temperatures (T(c)) in potassium-intercalated picene (K(x)picene).
- Analysis of magnetization drops to determine the sharpness of the superconducting transition.
Main Results:
- Metallic behavior and superconductivity were induced in picene by alkali metal intercalation.
- Potassium-intercalated picene (K(x)picene) exhibited T(c) values of 7 K and 18 K, dependent on metal content.
- A sharp magnetic transition (<2 K) was observed, similar to calcium-intercalated graphite.
Conclusions:
- Organic hydrocarbons, specifically K(x)picene, are viable candidates for new superconducting materials.
- The discovery opens avenues for developing organic superconductors with improved T(c) values.
- This research highlights the potential of intercalated organic solids in condensed matter physics.
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