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Kawaguchi G, Bardin AA, Suda M, Uruichi M, Yamamoto HM. An Ambipolar Superconducting Field-Effect Transistor Operating above Liquid Helium Temperature. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805715. [PMID: 30407651 DOI: 10.1002/adma.201805715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/21/2018] [Indexed: 06/08/2023]
Abstract
Superconducting (SC) devices are attracting renewed attention as the demands for quantum-information processing, meteorology, and sensing become advanced. The SC field-effect transistor (FET) is one of the elements that can control the SC state, but its variety is still limited. Superconductors at the strong-coupling limit tend to require a higher carrier density when the critical temperature (TC ) becomes higher. Therefore, field-effect control of superconductivity by a solid gate dielectric has been limited only to low temperatures. However, recent efforts have resulted in achieving n-type and p-type SC FETs based on organic superconductors whose TC exceed liquid He temperature (4.2 K). Here, a novel "ambipolar" SC FET operating at normally OFF mode with TC of around 6 K is reported. Although this is the second example of an SC FET with such an operation mode, the operation temperature exceeds that of the first example, or magic-angle twisted-bilayer graphene that operates at around 1 K. Because the superconductivity in this SC FET is of unconventional type, the performance of the present device will contribute not only to fabricating SC circuits, but also to elucidating phase transitions of strongly correlated electron systems.
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Affiliation(s)
- Genta Kawaguchi
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan
| | - Andrey A Bardin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region, 142432, Russia
| | - Masayuki Suda
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi, 444-8585, Japan
- RIKEN, Wako, Saitama, 351-0198, Japan
| | - Mikio Uruichi
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan
| | - Hiroshi M Yamamoto
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan
- SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi, 444-8585, Japan
- RIKEN, Wako, Saitama, 351-0198, Japan
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Suda M, Yamamoto HM. Field-, strain- and light-induced superconductivity in organic strongly correlated electron systems. Phys Chem Chem Phys 2018; 20:1321-1331. [PMID: 29149231 DOI: 10.1039/c7cp06716j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stimulated by the discovery of high-temperature superconductivity in 1986, band-filling control of strongly correlated electron systems has been a persistent challenge over the past three decades in condensed matter science. In particular, recent efforts have been focused on electrostatic carrier doping of these materials, utilising field-effect transistor (FET) structures to find novel superconductivity. Our group found the first field-induced superconductivity in an organic-based material in 2013 and has been developing various types of superconducting organic FETs. In this perspective, we summarise our recent results on the development of novel superconducting organic FETs. In addition, this perspective describes novel functionality of superconducting FETs, such as strain- and light-responsivity. We believe that the techniques and knowledge described here will contribute to advances in future superconducting electronics as well as the understanding of superconductivity in strongly correlated electron systems.
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Affiliation(s)
- Masayuki Suda
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan.
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Suda M, Kawasugi Y, Minari T, Tsukagoshi K, Kato R, Yamamoto HM. Strain-tunable superconducting field-effect transistor with an organic strongly-correlated electron system. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:3490-3495. [PMID: 24664491 DOI: 10.1002/adma.201305797] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Revised: 01/31/2014] [Indexed: 06/03/2023]
Abstract
A novel type of flexible organic field-effect transistor in which strain effects can be finely tuned continuously has been fabricated. In this novel device structure, electronic phases can be controlled both by "band-filling" and by "band-width" continuously. Finally, co-regulation of "band-filling" and "band-width" in the strongly-correlated organic material realize field-induced emergence of superconducting fractions at low temperature.
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Affiliation(s)
- Masayuki Suda
- Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan
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A strained organic field-effect transistor with a gate-tunable superconducting channel. Nat Commun 2013; 4:2379. [PMID: 23974634 DOI: 10.1038/ncomms3379] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 08/01/2013] [Indexed: 11/08/2022] Open
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