Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors
Soshi Iimura, Satoru Matsuishi, Masashi Miyakawa, Takashi Taniguchi, Katsuhiro Suzuki, Hidetomo Usui, Kazuhiko Kuroki, Ryoichi Kajimoto, Mitsutaka Nakamura, Yasuhiro Inamura, Kazuhiko Ikeuchi, Sungdae Ji, Hideo Hosono
DOI 10.1103/PhysRevB.88.060501 · Physical Review B
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Abstract
We investigate the doping dependence of the magnetic excitations in the two-superconducting-dome system LaFeAsO1−xDx. Using inelastic neutron scattering, spin fluctuations at different wave numbers were observed under both superconducting domes around x = 0.1 and 0.4 but vanished at x = 0.2 corresponding to the Tc valley. Theoretical calculations indicate that the characteristic doping dependence of the spin fluctuations is rationally explained as a consequence of the switching of the two intra-orbital nestings within Fe-3dYZ,ZX and Fe-3dX2−Y2 by electron doping. The present results imply that the multiorbital nature plays an important role in the doping and/or material dependence of the Tc of the iron pnictide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO1-xDx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 27 | Pressure not reported | unknown |
| LaFeAsO1-xDx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
| LaFeAsO1-xDx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | unknown |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| LaFeAsO1-xHx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | unknown |
| LaFeAsO1-xHx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | unknown |
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