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A strained organic field-effect transistor with a gate-tunable superconducting channel
Hiroshi M Yamamoto1, Masaki Nakano, Masayuki Suda
11] Division of Functional Molecular Systems, Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigounaka, Myodaiji, Okazaki 444-8585, Japan [2] RIKEN , 2-1 Hirosawa, Wako 351-0198, Japan [3] JST, PRESTO (Precursory Research for Embryonic Science and Technology), 4-1-8 Honcho, Kawaguchi 332-0012, Japan.
Nature Communications
|August 27, 2013
Summary
Researchers developed an organic superconducting field-effect transistor using substrate strain to control superconductivity. This method offers a new way to tune superconducting states in organic materials for advanced electronics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Organic Electronics
Background:
- Carrier mobility in silicon devices is enhanced by substrate-induced lattice strain, crucial for high-performance computing.
- Electric-field-induced superconductivity (SC) in devices has primarily relied on carrier density modulation.
- Organic materials offer unique properties, including lattice softness, for novel device applications.
Purpose of the Study:
- To demonstrate an active organic superconducting field-effect transistor (SC-FET) where lattice strain modulates superconducting properties.
- To explore the use of substrate-induced strain as a tunable parameter for achieving electric-field-induced superconductivity in organic materials.
- To realize a three-terminal Josephson junction device for advanced computing and fundamental condensed matter physics research.
Main Methods:
- Fabrication of an organic field-effect transistor utilizing a soft organic lattice.
- Application of tunable lattice strain via substrate selection to modulate the organic semiconductor.
- Integration with a paraelectric solid gate to induce a superconducting state at low temperatures.
Main Results:
- Demonstration of an active organic SC-FET where strain actively tunes the superconducting state.
- Achieved an induced superconducting state at low temperatures by controlling strain and carrier density.
- Successfully realized a three-terminal Josephson junction device based on the strained organic superconductor.
Conclusions:
- Substrate-induced strain is a viable and effective method for tuning superconductivity in organic materials.
- The developed organic SC-FET provides a new platform for exploring the interplay between bandwidth and filling control in correlated electronic systems.
- This work opens avenues for novel organic superconducting devices for advanced computing and fundamental research.
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