Syntheses of new carbon-based superconductors using solution-process and electrochemical process

2013 Fiscal Year Final Research Report

• Project/Area Number: 24654105
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Okayama University
• Principal Investigator: YOSHIHIRO Kubozono 岡山大学, 自然科学研究科, 教授 (80221935)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 超伝導 / 溶液プロセス / 電気化学 / 有機芳香族 / グラファイト / 鉄セレン系物質 / 電界効果キャリア注入

Research Abstract

An intercalation of metal atoms into various types of carbon materials was examined using a solution process and an electrochemical process. The Li doped picene shows the superconductivity with a superconducting transition temperature (Tc) as high as 11 K, while the K doped [6]phenacene also shows the Tc of 6 K. Furthermore, the metal-intercalation into graphite was also investigated, which provides the superconducting materials. The highest Tc is now 11.5 K in CaC6, which is the same as that prepared using high-temperature synthesis method with Li/Ca alloy. We tried to make superconducting materials through the intercalation of metal atoms into two-dimensional FeSe crystals, and diverse superconducting materials were successfully produced; the Tc of 46 K is achieved under high pressure. The high-density carrier accumulation into phenacene thin film and crystal was also achieved using electric-double-layer capacitor.

Research Products

• [Journal Article] Systematic control of hole-injection barrier height with electron acceptors in [7]phenacene single-crystal field-effect transistors (2014)
  • Author(s): X. He, S. Hamao, R. Eguchi, H. Goto, Y. Yoshida, G. Saito, Y. Kubozono
  • Journal Title: J. Phys. Chem. C Volume: 118 Pages: 5284-5293
  • DOI: 10.1021/jp4107469
  • Peer Reviewed
• [Journal Article] Superconducting phases in (NH_3)_yM_xFeSe_<1-x>Te (M = Li, Na, and Ca) (2014)
  • Author(s): Y. Sakai, L. Zheng, M. Izumi, K. Teranishi, R. Eguchi, H. Goto, T. Onji, S. Araki, T. C. Kobayashi, Y. Kubozono
  • Journal Title: Phys Volume: Rev. B, 89 Pages: 144509
  • DOI: 10.1103/PhysRevB.89.144509
  • Peer Reviewed
• [Journal Article] Observation of zero resitivity in K-doped picene (2013)
  • Author(s): K. Teranishi, X. He, Y. Sakai, M. Izumi, H. Goto, R. Eguchi, Y. Takabayashi, T. Kambe, Y. Kubozono
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 060505(R)
  • DOI: 10.1103/PhysRevB.87.060505
  • Peer Reviewed
• [Journal Article] Edge-dependent transport properties in graphene (2013)
  • Author(s): H. Goto, E. Uesugi, R. Eguchi, A. Fujiwara, Y. Kubozono
  • Journal Title: Nano Lett Volume: 13 Pages: 1126-1130
  • DOI: 10.1021/nl3044844
  • Peer Reviewed
• [Journal Article] Electric-double-layer transitors with thin crystals of FeSe1-xTex(x = 0.9 and 1.0) (2013)
  • Author(s): R. Eguchi, M. Senda, E. Uesugi, H. Goto, T. Kambe, T. Noji, Y. Koike, A. Fujiwara, Y. Kubozono
  • Journal Title: Appl. Phys. Lett Volume: 102 Pages: 103506
  • DOI: 10.1063/1.4795626
  • Peer Reviewed
• [Journal Article] Electric double-layer capacitance between an ionic liquid and few-layer graphene (2013)
  • Author(s): E. Uesugi, H. Goto, R. Eguchi, A. Fujiwara, Y. Kubozono
  • Journal Title: Scientific Reports Volume: 3 Pages: 1595
  • DOI: 10.1038/srep01595
  • Peer Reviewed
• [Journal Article] Fabrication of single crystal field-effect transistors with phenacne-type molecules and their excellent transistor characteristics (2013)
  • Author(s): X. He, R. Eguchi, H. Goto, E. Uesugi, S. Hamao, Y. Takabayashi, Y. Kubozono
  • Journal Title: Organic Electronics Volume: 14 Pages: 1673-1682
  • DOI: 10.1016/j.orgel.2013.03.035
  • Peer Reviewed
• [Journal Article] Parity effects in few-layer graphene (2013)
  • Author(s): H. Goto, E. Uesugi, R. Eguchi, Y. Kubozono
  • Journal Title: Nano Lett Volume: 13 Pages: 5153-5158
  • DOI: 10.1021/nl402404z
  • Peer Reviewed
• [Journal Article] Superconductivity in (NH_3)_yCs_<0.4>FeSe (2013)
  • Author(s): L. Zheng, M. Izumi, Y. Sakai, R. Eguchi, H. Goto, Y. Takabayashi, T. Kambe, T. Onji, S. Araki, T. C. Kobayashi, J. Kim, A. Fujiwara, Y. Kubozono
  • Journal Title: Phys Volume: Rev. B, 88 Pages: 094521
  • DOI: 10.1103/PhysRevB.88.094521
  • Peer Reviewed
• [Journal Article] Fabrication of high performance/highly functional field-effect taransistor devices based on [6]phenacene thin films (2013)
  • Author(s): R. Eguchi, X. He, S. Hamao, H. Goto, H. Okamoto, S. Gohda, K. Sato, Y. Kubozono
  • Journal Title: Phys. Chem. Chem. Phys Volume: 15 Pages: 20611-206167
  • DOI: 10.1039/c3cp53598c
  • Peer Reviewed
• [Journal Article] Synthesis and physical properties of metal-doped picene solids (2012)
  • Author(s): T. Kambe, X. He, Y. Takahashi, Y. Yamanari, K. Teranishi, H. Mitamura, S. Shibasaki, K. Tomita, R. Eguchi, H. Goto, Y. Takabayashi, T. Kato, A. Fujiwara, T. Kariyado, H. Aoki, Y. Kubozono
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 214507
  • DOI: 10.1103/PhysRevB.86.214507
  • Peer Reviewed
• [Presentation] New Carbon Superconductors : Synthese and Physical Properties (2013)
  • Author(s): Y. Kubozono
  • Organizer: International Conference on 'Qunatum in Complex Materilas'
  • Place of Presentation: Ischia, Italy
  • Year and Date: 20130527-0601
  • Invited
• [Presentation] Organic hydrocarbon superconductors GORDON RESEARCH CONFERNCE (Superconductivity) (2013)
  • Author(s): Y. Kubozono
  • Organizer: Les Diablerets
  • Place of Presentation: Switzerland
  • Year and Date: 20130512-17
  • Invited
• [Presentation] 芳香族超伝導の実験の状況 (2013)
  • Author(s): 久保園芳博
  • Organizer: 日本物理学会シンポジウム「相関電子系の超伝導―実験と理論の連携が生み出す俯瞰」
  • Place of Presentation: 広島大、東広島市
  • Year and Date: 20130327-30
• [Presentation] Superconductivity in metal-intercalated FeSeTe, graphite and hydrocarbons (2013)
  • Author(s): Y. Kubozono
  • Organizer: ICTP LEMSUPER Conference on Mechanisms and Developments in Light-Element Based and Other Novel Superconductors
  • Place of Presentation: Trieste, Italy
  • Year and Date: 2013-09-24
  • Invited
• [Presentation] 有機多環縮合炭化水素のエレクトロニクス応用と超伝導 (2013)
  • Author(s): 久保園芳博
  • Organizer: 第7回分子科学会討論会
  • Place of Presentation: 京都
  • Year and Date: 2013-09-24
  • Invited
• [Presentation] Superconductivity in metal doped hydrocarbons : characterization, structure, transport properties and mechanism of superconductivity (2013)
  • Author(s): Y. Kubozono
  • Organizer: ISCOM 2013
  • Place of Presentation: Montreal, Canada
  • Year and Date: 2013-07-18
  • Invited
• [Presentation] Phenacene field-effect transistors : High performance and application toward gas sensor (2013)
  • Author(s): Y. Kubozono
  • Organizer: EXPO Analyti2013
  • Place of Presentation: Suzhou China
  • Year and Date: 2013-05-23
  • Invited
• [Presentation] Superconductivity and transistor characteristics of carbon based materials (2012)
  • Author(s): Y. Kubozono
  • Organizer: The 6th International Workshop on Advanced Materials Science and Nanotechnology
  • Place of Presentation: Ha long City, Vietnum
  • Year and Date: 2012-11-01
  • Invited
• [Presentation] Superconductivity and electronics of new carbon materials Mulyifunctional Hybrids and Organics (2012)
  • Author(s): Y. Kubozono
  • Place of Presentation: Napoli, Italy
  • Year and Date: 2012-10-22
  • Invited
• [Presentation] Interface Control of Phenacene Field-effect Transistors and Excellent FET Characteristics (2012)
  • Author(s): Y. Kubozono
  • Organizer: Workshop on Surfaces, INterfaces and Functionalization Processes in Organic Compounds and Applications - SINFO2012
  • Place of Presentation: Parma, Italy
  • Year and Date: 2012-06-22
• [Remarks]
  • URL: http://interfa.rlss.okayama-u.ac.jp/