Electronic structure of superconductive diamond and related materials : Band insulator-metal transition and superconductivity

• Project/Area Number: 20340091
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Okayama University
• Principal Investigator: YOKOYA Takayoshi Okayama University, 大学院・自然科学研究科, 教授 (90311646)
• Co-Investigator(Renkei-kenkyūsha): MURAOKA Yuji 岡山大学, 大学院・自然科学研究科, 准教授 (10323635) ; WAKITA Takanori 岡山大学, 大学院・自然科学研究科, 特任助教 (10423279)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000); Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2008: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
• Keywords: 高濃度ホウ素ドープダイヤモンド超伝導体 / 半導体-金属転移 / 電子状態 / 光電子分光 / 高濃度リンドープダイヤモンド / ピセン超伝導体 / ダイヤモンド超伝導

Research Abstract

We have investigated evolution of electronic structure across semiconductor to metal transition of boron(B)-doped diamond and its related compounds by using photoemission spectroscopy. Soft x-ray angle-resolved photoemission spectroscopy has revealed valence band electronic dispersions of heavily B-doped superconductive diamond. Core level photoemission spectroscopy has showed multiple chemical sites of dopant atoms for heavily B- and phosphorous-doped diamond. For new superconductors, CaC_6 and potassium doped picene, evolution of electronic structure near the Fermi level due to intercalation and doping, respectively, have been observed directly, which provide insight into the mechanism of the superconductivity.

Research Products

• [Journal Article] Photoemission Study of Electronic Structure Evolution across the Metal-Insulator Transition of Heavily B-doped Diamond (2011)
  • Author(s): H.Okazaki, T.Arakane, K.Sugawara, T.Sato, T.Takahashi, T.Wakita, M.Hirai, Y.Muraoka, Y.Takano, S.Ishii, S.Iriyama, H.Kawarada, T.Yokoya
  • Journal Title: J.Phys.Chem.Solids 72 Pages: 582-584
  • Peer Reviewed
• [Journal Article] Multiple phosphorus chemical sites in heavily phosphorus-doped diamond (2011)
  • Author(s): H.Okazaki, R.Yoshida, T.Muro, T.Nakamura, T.Wakita, Y.Muraoka, M.Hirai, H.Kato, S.Yamasaki, Y.Takano, S.Ishii, T.Oguchi, T.Yokoya
  • Journal Title: Appl.Phys.Lett. 98 Pages: 82107-82107
  • NAID: 120004724414
  • Peer Reviewed
• [Journal Article] Multiple phosphorus chemical sites in heavily phosphorus-doped diamond (2011)
  • Author(s): H.Okazaki, et al.
  • Journal Title: Appl.Phys.Lett. Volume: 98
  • Peer Reviewed
• [Journal Article] Electronic structure of pristine and K-doped picene: Nonrigid band change and its implication for electron-intramolecular-vivration interaction (2010)
  • Author(s): H.Okazaki, T.Wakita, T.Muro, Y.Kaji, X.Lee, H.Mitamura, N.Kawasaki, Y.Kubozono, Y.Yamanari, T.kambe, T.Kato, M.Hirai, Y.Muraoka, T.Yokoya
  • Journal Title: Phys.Rev.B 82 Pages: 195114-195114
  • Peer Reviewed
• [Journal Article] Photoemission study of Ca-intercalated graphite superconductor CaC_5 (2010)
  • Author(s): H.Okazaki, et al.
  • Journal Title: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Volume: 470
  • Peer Reviewed
• [Journal Article] Angle-resolved photoemission study of Si electronic structure : Boron concentration dependence (2010)
  • Author(s): T.Wakita, et al.
  • Journal Title: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Volume: 470
  • NAID: 120004724423
  • Peer Reviewed
• [Journal Article] Electronic structure of pristine and K-doped picene : Nonrigid band change and its implication for electron-intramolecular-vivration interaction (2010)
  • Author(s): H.Okazaki, et al.
  • Journal Title: Phys.Rev.B Volume: 82
  • Peer Reviewed
• [Journal Article] Spectroscopic evidence of the existence of substantial Ca 3d derived states at the Fermi level in the Ca-intercalated graphite superconductor CaC_6 (2009)
  • Author(s): H.Okazaki, R.Yoshida, K.Iwai, K.Noami, T.Muro, T.Nakamura, T.Wakita, Y.Muraoka, M.Hirai, F.Tomioka, Y.Takano, A.Takenaka, M.Toyoda, T.Oguchi, T.Yokoya
  • Journal Title: Phys.Rev.B 80
  • Peer Reviewed
• [Journal Article] Soft X-Ray Core-Level Photoemission Study of Boron Sites in Heavily Boron-Doped Diamond Films (2009)
  • Author(s): H.Okazaki, R.Yoshida, T.Muro, T.Wakita, M.Hirai, Y.Muraoka, Y.Takano, S.Iriyama, H.Kawarada, T.Oguchi, T.Yokoya
  • Journal Title: J.Phys.Soc.Jpn. 78 Pages: 34703-34703
  • NAID: 110007138874
  • Peer Reviewed
• [Journal Article] Spectroscopic evidence of the existence of substantial Ca 3d derived states at the Fermi level in the Ca-intercalated graphite superconductor CaC6 (2009)
  • Author(s): H.Okazaki, et al.
  • Journal Title: Physical Review B 80
  • Peer Reviewed
• [Journal Article] The electronic structure of Ca-intercalated superconducting graphite CaC6 (2009)
  • Author(s): H.Okazaki, et al.
  • Journal Title: Physica C 469 Pages: 1041-1044
  • Peer Reviewed
• [Journal Article] Ishizaka et al. Reply (2009)
  • Author(s): K.Ishizaka, et al.
  • Journal Title: Physical Review Letters 102 Pages: 199702-199702
  • Peer Reviewed
• [Journal Article] Soft X-Ray Core-Level Photoemission Study of Boron Sites in Heavily Boron-Doped Diamond Films (2009)
  • Author(s): H. Okazaki, et al.
  • Journal Title: J. Phys. Soc. Jpn. 78
  • Peer Reviewed
• [Journal Article] Near E_F electronic structure of heavily boron-doped superconducting diamond (2008)
  • Author(s): H.Okazaki, T.Yokoya, J.Nakamura, N.Yamada, T.Nakamura, T.Muro, Y.Tamenori, T.Matsudhita, Y.Takata, T.Tokushima, S.Shin, Y.Takano, N.Nagao, T.Takenouchi, H.Kawarada, T.Oguchi
  • Journal Title: J.Phys.Chem.Soilds 69 Pages: 2978-2981
  • Peer Reviewed
• [Journal Article] Temperature-dependent localized excitations of doped carriers in superconducting diamond (2008)
  • Author(s): K. Ishizaka, et al.
  • Journal Title: Physical Review Letters 77
  • Peer Reviewed
• [Journal Article] ・Near EF electronic structure of heavily boron-doped superconducting diamond (2008)
  • Author(s): H. Okazaki, et al.
  • Journal Title: J. Phys. Chem. Solids 69 Pages: 2978-2981
  • Peer Reviewed
• [Presentation] ホットフィラメント化学気相成長法を用いた高濃度ホウ素ドープダイヤモンド膜の作製と物性評価 (2011)
  • Author(s): 平松千明, 他
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] Siの光電子分光:空準位の効果 (2010)
  • Author(s): 脇田高徳, 他
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2010-09-25
• [Presentation] TaCフィラメントを用いたHFCVD法による高濃度ホウ素ドープ超伝導ダイヤモンド膜の作製 (2010)
  • Author(s): 土居智彰, 他
  • Organizer: 応用物理学会中国四国支部日本物理学会中国支部・四国支部日本物理教育学会中国四国支部2010年度支部学術講演会
  • Place of Presentation: 高知大学朝倉キャンパス
  • Year and Date: 2010-07-31
• [Presentation] Photoemission Study of The Electronic Structure Evolution across Metal-Insulator Transition of Heavily B-doped Diamond (2010)
  • Author(s): Hiroyuki Okazaki, Takayuki Arakane, Katsuaki Sugawara, Takahumi Sato, Takashi Takahashi, Takanori Wakita, Masaaki Hirai, Yuji Muraoka, Yoshihiko Takano, Satoshi Ishii, Shingo Iriyama, Hiroshi Kawarada, Takayoshi Yokoya
  • Organizer: the 9th International Conference on Spectroscopies in Novel Superconductors (SNS2010) (5/23-5/28/2010)
  • Place of Presentation: Shanghai, Chaina
  • Year and Date: 2010-05-24
• [Presentation] Photoemission Study of The Electronic Structure Evolution across Metal-Insulator Transition of Heavily B-doped Diamond (2010)
  • Author(s): Hiroyuki Okazaki, et al.
  • Organizer: the 9th International Conference on Spectroscopies in Novel Superconductors (SNS2010)
  • Place of Presentation: 中国 上海
  • Year and Date: 2010-05-24
• [Presentation] Si(111)1x1水素終端面の角度分解共鳴光電子分光 (2010)
  • Author(s): 脇田高徳, 他
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス(岡山県)
  • Year and Date: 2010-03-23
• [Presentation] 光電子分光によるポタシウムドープピセンの電子状態 (2010)
  • Author(s): 岡崎宏之, 他
  • Organizer: 日本物理学会 第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス(岡山県)
  • Year and Date: 2010-03-21
• [Presentation] ホットフィラメントCVD法を用いた溶液原料からの高濃度ホウ素ドープダイヤモンド膜の作製 (2010)
  • Author(s): 土居智彰, 他
  • Organizer: 2010年春季 第57回応用物理学関係連合講演会
  • Place of Presentation: 東海大学湘南キャンパス(神奈川県)
  • Year and Date: 2010-03-19
• [Presentation] 光電子分光による芳香族多環縮合炭化水素ピセンの電子状態 (2009)
  • Author(s): 岡崎宏之, 他
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本県)
  • Year and Date: 2009-09-28
• [Presentation] グラファイトインターカレーション超伝導体CaC6の共鳴光電子分光 (2009)
  • Author(s): 岡崎宏之, 他
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス(熊本県)
  • Year and Date: 2009-09-27
• [Presentation] Photoemission Study of Ca-intercalated Graphite Superconductor CaC6 (2009)
  • Author(s): H.Okazaki, et al.
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity(M2S-IX)
  • Place of Presentation: Keio Plaza Hotel, Tokyo, Japan,
  • Year and Date: 2009-09-08
• [Presentation] Photoemission Spectroscopy of Doped Band Insulators and Related Superconductors (2009)
  • Author(s): T.Yokoya, et al.
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity(M2S-IX)
  • Place of Presentation: Keio Plaza Hotel, Tokyo, Japan,
  • Year and Date: 2009-09-08
• [Presentation] 熱フィラメントCVD法による高濃度ホウ素ドープダイヤモンド膜の作製 (2009)
  • Author(s): 土居智彰, 他
  • Organizer: 応用物理学会中国四国支部、日本物理学会中国支部、四国支部2009年度支部学術講演会
  • Place of Presentation: 広島大学東広島キャンパス(広島県)
  • Year and Date: 2009-08-01
• [Presentation] シリコンの光電子分光 : ボロン濃度依存性II (2009)
  • Author(s): 脇田高徳, 他
  • Organizer: 日本物理学会(第64回年次大会)
  • Place of Presentation: 立教学院池袋キャンパス
  • Year and Date: 2009-03-30
• [Presentation] 光電子分光による高濃度ホウ素ドープダイヤモンドの金属-絶縁体転移前後の電子状態の観測 (2009)
  • Author(s): 岡崎宏之, 他
  • Organizer: 日本物理学会(第64回年次大会)
  • Place of Presentation: 立教学院池袋キャンパス
  • Year and Date: 2009-03-30
• [Presentation] Photoemission Spectroscopy of Doped Band Insulators and Related Superconductors (2009)
  • Author(s): Takayoshi Yokoya, Hiroyuki Okazaki, Takanori Wakita, Rikiya Yoshida, Masaaki Hirai, Yuji Muraoka
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity (M^2S-IX)
  • Place of Presentation: Keio Plaza Hotel, Tokyo, Japan
• [Presentation] Photoemission Study of Ca-intercalated Graphite Superconductor CaC_6 (2009)
  • Author(s): H.Okazaki, R.Yoshida, K.Iwai, K.Noami, T.Muro, T.Nakamura, T.Wakita, Y.Muraoka, M.Hirai, F.Tomioka, Y.Takano, A.Takenaka, M.Toyoda, T.Oguchi, T.Yokoya
  • Organizer: The 9th International Conference on Materials and Mechanisms of Superconductivity (M^2S-IX)
  • Place of Presentation: Keio Plaza Hotel, Tokyo, Japan
• [Presentation] 光電子分光による芳香族多環縮合炭化水素ピセンの電子状態 (2009)
  • Author(s): 岡崎宏之、室隆桂之、為則雄祐、脇田高徳、村岡祐治、平井正明、川崎菜穂子、加地由美子、久保園芳博、山成悠介、神戸高志、横谷尚睦
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
• [Presentation] Photoemission spectroscopy study of heavily boron doped diamond and silicon electronic structures (2008)
  • Author(s): T.Wakita, H.Okazaki, K.Saeki, M.Ono, T.Eguchi, T.Okuda, A.Harasawa, I.Matsuda, Y.Hasegawa, Y.Takano, M.Hirai, Y.Muraoka, T.Yokoya
  • Organizer: The 2nd International Symposium on Anomalous Quantum Materials (ISAQM2008) and the 7th Asia-Pacific Workshop
  • Place of Presentation: 東京大学本郷キャンパス
  • Year and Date: 2008-11-09
• [Presentation] Photoemission spectroscopy study of heavily boron doped diamond and siliconelectronic structures. (2008)
  • Author(s): T. Wakita, et al.
  • Organizer: The 2nd International Symposium on Anomalous Quantum Materials(ISAQM2008)and the 7th Asia-Pacific Workshop
  • Place of Presentation: 東京大学本郷キャンパス
  • Year and Date: 2008-11-09
• [Presentation] The electronic structure of Ca-intercalated superconducting graphite CaC6 (2008)
  • Author(s): H. Okazaki, et al.
  • Organizer: 21th International Symposium on Superconductivity (ISS2008)
  • Place of Presentation: エポカルつくば
  • Year and Date: 2008-10-28
• [Presentation] 高分解能光電子分光によるグラフアイトインターカレーション超伝導体CaC6の電子状態 (2008)
  • Author(s): 岡崎宏之, 他
  • Organizer: 日本物理学会(2008年秋季大会)
  • Place of Presentation: 岩手大学上田キャンパス
  • Year and Date: 2008-09-21
• [Presentation] シリコンの光電子分光 : ボロン濃度依存性. (2008)
  • Author(s): 脇田高徳, 他
  • Organizer: 日本物理学会(2008年秋季大会)
  • Place of Presentation: 岩手大学上田キャンパス
  • Year and Date: 2008-09-20
• [Presentation] グラフアイトインクーカレーション超伝導体C6Caの高分解能光電子分光 (2008)
  • Author(s): 岡崎宏之, 他
  • Organizer: 応用物理学会中国四国支部 日本物理学会中国支部・四国支部日本物理教育学会中国四国支部 2008年度支部学術講演会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2008-08-02
• [Remarks]
  • URL: http://film.rlss.okayama-u.ac.jp/