Pseudogap and superconducting gap in high temperature superconducting copper oxides
| Project/Area Number |
24340083
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
TAJIMA Setsuko 大阪大学, 理学(系)研究科(研究院), 教授 (70188241)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MIYASAKA Shigeki 大阪大学, 理学研究科, 准教授 (70345106)
MASUI Takahiko 近畿大学, 理工学部, 准教授 (10403099)
TANAKA Kiyohisa 分子科学研究所, 分子研, 准教授 (60511003)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
TOHYAMA Takami 東京理科大学, 理学部, 教授 (70237056)
|
|---|
| Research Collaborator |
UYKUR Ece 大阪大学, 理学研究科
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
|
|---|
| Keywords | 高温超伝導 / 強相関 / 擬ギャップ / 超伝導ギャップ / 光学的性質 / 銅酸化物 / 同位体置換効果 / ラマン散乱分光 / 角度分解光電子分光 / 光学スペクトル |
|---|
| Outline of Final Research Achievements |
We studied the pseudogap problem of the cuprates that is most important to elucidate the high temperature superconductivity mechanism. It has been clarified from the measurements of optical spectra that the pseudogap coexists with superconducting gap and not a precursor of superconductivity. A precursor of superconductivity was independently observed between the peusdogap temperature and superconducting temperature Tc. It was also revealed that the precursor temperature decreases with doping, being different from that of Tc, which suggests the importance of electron correlation for Cooper pairing. It is likely that the coexistence of pseudogap and superconducting gap causes the anomalous properties of superconducting gap.
|
Report
(4 results)
Research Products
(140 results)
-
-
[Journal Article] Strongly three-dimensional electronic structure and Fermi surfaces of SrFe2(As0.65P0.35)2: Comparison with BaFe2(As1-xPx)22014
Author(s)
H. Suzuki, T. Kobayashi, S. Miyasaka, T. Yoshida, K. Okazaki, L. C. C. Ambolode II, S. Ideta, M. Yi, M. Hashimoto, D. H. Lu, Z. –X. Shen, K. Ono, H. Kumigashira, S. Tajima, A. Fujimori
-
Journal Title
Physical Review B
Volume: 89
Issue: 18
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Soft- and Hard-X-ray Photoemission Spectroscopy of La2-2xSr1+2xMn2O72012
Author(s)
H. Fujiwara, A. Sekiyama, H. Sugiyama, G. Funabashi, T. Muro, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, S. Miyasaka, H. Nakamura, T. Kimura, Y. Tokura and S. Suga
-
Journal Title
J. Phys. Soc. Jpn. Suppl. B
Volume: 81
Issue: Suppl.B
Pages: SB069-SB069
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Magneto-elastic coupling in detwinned SrFe2As2by inelastic X-ray scattering2015
Author(s)
N. Murai, T. Fukuda, H. Uchiyama, S. Tsutsui, D. Ishikawa, T. Kobayashi, H. Nakamura, M. Machida, M. Nakajima, S. Miyasaka, S. Tajima, A.Q.R. Baron,
Organizer
American Physical Society March Meeting
Place of Presentation
San Antonio, USA
Year and Date
2015-03-02 – 2015-03-06
Related Report
-
-
-
[Presentation] Magneto-elastic Coupling in Detwinned SrFe2As2by Inelastic X-ray Scattering2014
Author(s)
N. Murai, T. Fukuda, H. Uchiyama, S. Tsutsui, D. Ishikawa, T. Kobayashi, H. Nakamura, M. Machida, M. Nakajima, S. Miyasaka, S. Tajima, A.Q.R. Baron
Organizer
The 27th International Superconductivity Symposium
Place of Presentation
Tokyo
Year and Date
2014-11-25 – 2014-11-27
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] What controls the bosonic fluctuation and Tc in iron-based superconductors?2014
Author(s)
S. Tajima, S. Miyasaka, A. Takemori, K. T. Lai, T. Kobayashi, Y. Nakamatsu, T. Adachi, H. Suzuki, A. Fujimori, H. Mukuda
Organizer
The Beijing International Workshop (II) on Iron-Based Superconductors
Place of Presentation
Beijing, Ｃｈｉｎａ
Year and Date
2014-08-04 – 2014-08-07
Related Report
Invited
-
-
[Presentation] Superconducting transition temperature and re-emergence of antiferromagnetic order in LaFe(As1−xPx)(O1−yFy)2014
Author(s)
H. Mukuda, F. Engetsu, T. Shiota, K. Yamamoto, K. T. Lai, M. Yashima, Y. Kitaoka, A. Takemori, S. Miyasaka, S. Tajima
Organizer
International Conference on Strongly Correlated Electron Systems
Place of Presentation
Grenoble, France
Year and Date
2014-07-07 – 2014-07-11
Related Report
-
-
-
-
-
-
-
-
[Presentation] Effect of Electron Irradiation on isovalenly substituted SrFe2(As0.65P0.35)22014
Author(s)
C. P. Strehlow, J. Murphy, M. Tanatar, R. Prozorov, M. Konczykowski, N. Salovich, R. W. Giannetta, T. Kobayashi, S. Miyasaka, S. Tajima
Organizer
American Physical Society, March Meeting
Place of Presentation
Denver, USA
Related Report
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] NMR studies on La-Fe-As-O based high-Tc superconductors2013
Author(s)
H. Mukuda, K. Yamamoto, S. Furukawa, H. Kinouchi, M. Yashima, Y.Kitaoka, P. M Shirage, H. Eisaki, A. Iyo, K. T. Lai, A.Takemori, S.Miyasaka, S.Tajima
Organizer
The 12th Asia Pacific Physics Conference
Place of Presentation
Makuhari, Japan
Related Report
-
[Presentation] NMR studies in multilayer cuprates and Fe pnictides2013
Author(s)
H. Mukuda, K. Yamamoto, S. Furukawa, H. Kinouchi, M. Yashima, Y.Kitaoka, P. M Shirage, H. Eisaki, A. Iyo, K. T. Lai, A.Takemori, S.Miyasaka, S.Tajima
Organizer
Institute for Materials Research (IMR) Workshop
Place of Presentation
Sendai, Japan
Related Report
Invited
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
