Electronic structure of Ca10(Pt4As8)(Fe

Xiaoping Shen

¹

,

S. D. Chen

²

,

Q. Q. Ge

³

et al.

Iron-based high transition temperature superconductors

“…Such a correlation with the superconductivity suggest the importance of this hole Fermi surface. However, later, a counter example is found in Ca 10 (Pt 4 As 8 )(Fe 2−x Pt x As 2 ) 5 (T c ∼20 K), where only d xy based hole pocket exists [165]. A likely cause is that the d xy -based bands are strongly scattered by Co dopants in BaFe 2−x Co x As 2 and NaFe 1−x Co x As, while it is not strongly scattered in Ca 10 (Pt 4 As 8 )(Fe 2−x Pt x As 2 ) 5 .…”

Electrical and Thermal Transport Properties of Layered Superconducting Ca10(Pt4As8)((Fe0.86Pt0.14)2As2)5 Single Crystal

“…The electronic structure for Ca 10 (Pt 4 As 8 )(Fe 2 As 2 ) 5 has been studied via angle resolved photoemission spectroscopy (ARPES) [9]. Generally, there is a hole pocket and an electron pocket around the zone center.…”

“…Thus, the Pt 4 As 8 layer is suggested to be metallic. Furthermore, the d xz and d yz bands are not degenerate at the Brillouin zone center ( Γ point) and there is only hole-like Fermi surface at the Γ point originated from d xy orbitals, it may be caused by the interaction between the Pt 4 As 8 and FeAs layers [9].…”

Distinct local structure of superconducting Ca10M4As8(Fe2As2)5Paris1, Wakita2, Proux3 et al. 2017Phys. Rev. B5060View full textAdd to dashboardCite

“…Generally, these layered arsenides are characterized by tetrahedrally coordinated FeAs 4 metallic layers intercalated by a nonmetallic spacer layer, different for different families of iron-based superconducting arsenides [2,3]. Among these, the skutterudite-type layered arsenides Ca 10 M n As 8 (Fe 2 As 2 ) 5 (M = Pt, Ir) are characterized by complex spacer layers [4][5][6][7][8][9][10][11][12][13] that would be conducting unlike the one in most of the iron-based superconductors. The FeAs 4 active layers are stacked with M n As 8 layers, where M = Pt or Ir and n = 3 or 4.…”