Abstract
Angle resolved photoemission spectroscopy of Ba(Fe1-xCo x)2As2 (x = 0:06, 0.14, and 0.24) shows that the width of the Fe 3dyz/zx hole band depends on the doping level. In contrast, the Fe 3dx2-y2 and 3z2 - r2 bands are rigid and shifted by the Co doping. The Fe 3dyz/zx hole band is flattened at the optimal doping level x = 0:06, indicating that the band renormalization of the Fe 3dyz/zx band correlates with the enhancement of the superconducting transition temperature. The orbital-dependent and doping-dependent band renormalization indicates that the fluctuations responsible for the superconductivity is deeply related to the Fe 3d orbital degeneracy.
| Original language | English |
|---|---|
| Article number | 113707 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 80 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2011 Nov |
| Externally published | Yes |
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Keywords
- Angle-resolved photoemission spectroscopy
- Band renormalization
- Fe-based superconductors
- Orbital degeneracy
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Doping-dependent and orbital-dependent band renormalization in Ba(Fe 1-xCox)2As2 superconductors. / Sudayama, Takaaki; Wakisaka, Yuki; Mizokawa, Takashi; Ibuka, Soshi; Morinaga, Rei; Sato, Taku J.; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Saini, Naurang L.
In: Journal of the Physical Society of Japan, Vol. 80, No. 11, 113707, 11.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Doping-dependent and orbital-dependent band renormalization in Ba(Fe 1-xCox)2As2 superconductors
AU - Sudayama, Takaaki
AU - Wakisaka, Yuki
AU - Mizokawa, Takashi
AU - Ibuka, Soshi
AU - Morinaga, Rei
AU - Sato, Taku J.
AU - Arita, Masashi
AU - Namatame, Hirofumi
AU - Taniguchi, Masaki
AU - Saini, Naurang L.
PY - 2011/11
Y1 - 2011/11
N2 - Angle resolved photoemission spectroscopy of Ba(Fe1-xCo x)2As2 (x = 0:06, 0.14, and 0.24) shows that the width of the Fe 3dyz/zx hole band depends on the doping level. In contrast, the Fe 3dx2-y2 and 3z2 - r2 bands are rigid and shifted by the Co doping. The Fe 3dyz/zx hole band is flattened at the optimal doping level x = 0:06, indicating that the band renormalization of the Fe 3dyz/zx band correlates with the enhancement of the superconducting transition temperature. The orbital-dependent and doping-dependent band renormalization indicates that the fluctuations responsible for the superconductivity is deeply related to the Fe 3d orbital degeneracy.
AB - Angle resolved photoemission spectroscopy of Ba(Fe1-xCo x)2As2 (x = 0:06, 0.14, and 0.24) shows that the width of the Fe 3dyz/zx hole band depends on the doping level. In contrast, the Fe 3dx2-y2 and 3z2 - r2 bands are rigid and shifted by the Co doping. The Fe 3dyz/zx hole band is flattened at the optimal doping level x = 0:06, indicating that the band renormalization of the Fe 3dyz/zx band correlates with the enhancement of the superconducting transition temperature. The orbital-dependent and doping-dependent band renormalization indicates that the fluctuations responsible for the superconductivity is deeply related to the Fe 3d orbital degeneracy.
KW - Angle-resolved photoemission spectroscopy
KW - Band renormalization
KW - Fe-based superconductors
KW - Orbital degeneracy
UR - http://www.scopus.com/inward/record.url?scp=80755176715&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80755176715&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.80.113707
DO - 10.1143/JPSJ.80.113707
M3 - Article
AN - SCOPUS:80755176715
VL - 80
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
M1 - 113707
ER -