scholarly journals Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy

2018 ◽  
Vol 97 (18) ◽  
Author(s):  
Y. S. Kushnirenko ◽  
A. V. Fedorov ◽  
E. Haubold ◽  
S. Thirupathaiah ◽  
T. Wolf ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Angle Resolved Photoemission Spectroscopy

scholarly journals Band-dependent superconducting gap in SrFe2(As0.65P0.35)2 studied by angle-resolved photoemission spectroscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
H. Suzuki ◽  
T. Kobayashi ◽  
S. Miyasaka ◽  
K. Okazaki ◽  
T. Yoshida ◽  
...  
Keyword(s):  
Order Parameter ◽  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Direct Identification ◽  
Fermi Surfaces ◽  
Iron Pnictide ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Sign Change ◽  
Gap Structure

Abstract The isovalent-substituted iron pnictide compound SrFe2(As1−xPx)2 exhibits multiple evidence for nodal superconductivity via various experimental probes, such as the penetration depth, nuclear magnetic resonance and specific heat measurements. The direct identification of the nodal superconducting (SC) gap structure is challenging, partly because the presence of nodes is not protected by symmetry but instead caused by an accidental sign change of the order parameter, and also because of the three-dimensionality of the electronic structure. We have studied the SC gaps of SrFe2(As0.65P0.35)2 in three-dimensional momentum space by synchrotron and laser-based angle-resolved photoemission spectroscopy. The three hole Fermi surfaces (FSs) at the zone center have SC gaps with different magnitudes, whereas the SC gaps of the electron FSs at the zone corner are almost isotropic and kz-independent. As a possible nodal SC gap structure, we propose that the SC gap of the outer hole FS changes sign around the Z-X [(0, 0, 2π) − (π, π, 2π)] direction.

BL5U at UVSOR-II for Three-dimensional Angle-resolved Photoemission Spectroscopy

2007 ◽  
Author(s):  
Takahiro Ito ◽  
Shin-ichi Kimura ◽  
Hojun Im ◽  
Eiken Nakamura ◽  
Masahiro Sakai ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy

Three-dimensional band structure of highly metallicNa0.8WO3by angle-resolved photoemission spectroscopy

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
Satyabrata Raj ◽  
Anirban Chakraborty ◽  
Debraj Choudhury ◽  
Takafumi Sato ◽  
Takashi Takahashi ◽  
...  
Keyword(s):  
Band Structure ◽  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy
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