Angle resolved photoemission spectroscopy of Ba(Fe(1-x)Co(x))(2)As(2) (x = 0.06, 0.14, and 0.24) shows that the width of the Fe 3d(yz/zx) hole band depends on the doping level. In contrast, the Fe 3d(x2-y2) and 3z(2) - r(2) bands are rigid and shifted by the Co doping. The Fe 3d(yz/zx) hole band is flattened at the optimal doping level x = 0.06, indicating that the band renormalization of the Fe 3d(yz/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.
Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe(1-x)Co(x))(2)As(2) Superconductors / Takaaki, Sudayama; Yuki, Wakisaka; Takashi, Mizokawa; Soshi, Ibuka; Rei, Morinaga; T. J., Sato; Masashi, Arita; Hirofumi, Namatame; Masaki, Taniguchi; Saini, Naurang Lal. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - 80:11(2011), p. 113707. [10.1143/jpsj.80.113707]
Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe(1-x)Co(x))(2)As(2) Superconductors
SAINI, Naurang Lal
2011
Abstract
Angle resolved photoemission spectroscopy of Ba(Fe(1-x)Co(x))(2)As(2) (x = 0.06, 0.14, and 0.24) shows that the width of the Fe 3d(yz/zx) hole band depends on the doping level. In contrast, the Fe 3d(x2-y2) and 3z(2) - r(2) bands are rigid and shifted by the Co doping. The Fe 3d(yz/zx) hole band is flattened at the optimal doping level x = 0.06, indicating that the band renormalization of the Fe 3d(yz/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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
