Fermiology of d-electron mutiband superconductors
Project/Area Number |
26400373
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
|
Research Institution | National Institute for Materials Science |
Principal Investigator |
TERASHIMA Taichi 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主席研究員 (40343834)
|
Research Collaborator |
KIKUGAWA Naoki
|
Project Period (FY) |
2014-04-01 – 2017-03-31
|
Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | フェルミ面 / 量子振動 / 超伝導 / 質量増強 / フェルミオロジー / 多体効果 / 電子格子相互作用 / 電子間相互作用 / 質量増強因子 / 多バンド |
Outline of Final Research Achievements |
We performed quantum oscillation measurements on SrPt3P and observed part of the Fermi surface. The mass enhancement factors are between 0 and 0.9 for the observed orbits. On the other hand, the Sommerfeld coefficient reported previously suggests the enhancement factor averaged over the whole Fermi surface is approximately 1. This suggests that strong electron-phonon interactions exist on a part of the Fermi surface that is not yet observed. We performed quantum oscillation measurements on FeSe and determined the Fermi surface. The determined Fermi surface significantly deviates from what band-structure calculations predict. The Fermi surface is anomalously small and the carrier number is approximately 0.01 per Fe, which is one order-of-magnitude smaller than predicted. This indicates that electron correlations that are not included in the calculations are important in determining the electronic structure of FeSe.
|
Report
(4 results)
Research Products
(27 results)
-
-
-
-
-
-
-
-
-
[Journal Article] Fermi surface reconstruction in FeSe under high pressure2016
Author(s)
Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, David Graf, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Yuji Matsuda, Takasada Shibauchi, Thomas Wolf, Anna E. Bohmer, Frederic Hardy, Christoph Meingast, Hilbert v. Lohneysen, and Shinya Uji
-
Journal Title
Phys. Rev. B
Volume: 93
Issue: 9
Pages: 094505-094505
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
[Journal Article] Pressure-Induced Antiferromagnetic Transition and Phase Diagram in FeSe2015
Author(s)
Taichi Terashima, Naoki Kikugawa, Shigeru Kasahara, Tatsuya Watashige, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Bohmer, Frederic Hardy, Christoph Meingast, Hilbert v. Lohneysen, and Shinya Uji
-
Journal Title
J. Phys. Soc. Jpn.
Volume: 84
Issue: 6
Pages: 063701-063701
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
-
[Journal Article] Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements2014
Author(s)
Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Hiroaki Ikeda, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Bohmer, Frederic Hardy, Christoph Meingast, Hilbert v. Lohneysen, Michi-To Suzuki, Ryotaro Arita, Shinya Uji
-
Journal Title
Physical Review B
Volume: 90
Issue: 14
Pages: 144517-144517
DOI
Related Report
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] FeSeのSdH振動2014
Author(s)
Taichi Terashima, Naoki Kikugawa, Andhika Kiswandhi, Eun-Sang Choi, James S. Brooks, Shigeru Kasahara, Tatsuya Watashige, Hiroaki Ikeda, Takasada Shibauchi, Yuji Matsuda, Thomas Wolf, Anna E. Bohmer, Frederic Hardy, Christoph Meingast, Hilbert v. Lohneysen, Michi-To Suzuki, Ryotaro Arita, and Shinya Uji
Organizer
日本物理学会2014年秋季大会
Place of Presentation
中部大学
Year and Date
2014-09-07 – 2014-09-10
Related Report
-
-