Emergence of double-dome superconductivity in ammoniated metal-doped FeSe
Izumi, M; Zheng, L; Sakai, Y; Goto, H; Sakata, M; Nakamoto, Y; Nguyen, HLT; Kagayama, T; Shimizu, K; Araki, S; Kobayashi, TC; Kambe, T; Gu, DC; Guo, J; Liu, J; Li, YC; Sun, LL; Prassides, K; Kubozono, Y; Liu J(刘景); Li YC(李延春)
AbstractThe pressure dependence of the superconducting transition temperature (T-c) and unit cell metrics of tetragonal (NH3)(y)Cs0.4FeSe were investigated in high pressures up to 41 GPa. The T-c decreases with increasing pressure up to 13 GPa, which can be clearly correlated with the pressure dependence of c (or FeSe layer spacing). The T-c vs. c plot is compared with those of various (NH3)(y)MxFeSe (M: metal atoms) materials exhibiting different T-c and c, showing that the T-c is universally related to c. This behaviour means that a decrease in two-dimensionality lowers the T-c. No superconductivity was observed down to 4.3 K in (NH3)(y)Cs0.4FeSe at 11 and 13 GPa. Surprisingly, superconductivity re-appeared rapidly above 13 GPa, with the T-c reaching 49 K at 21 GPa. The appearance of a new superconducting phase is not accompanied by a structural transition, as evidenced by pressure-dependent XRD. Furthermore, T-c slowly decreased with increasing pressure above 21 GPa, and at 41 GPa superconductivity disappeared entirely at temperatures above 4.9 K. The observation of a double-dome superconducting phase may provide a hint for pursuing the superconducting coupling-mechanism of ammoniated/non-ammoniated metal-doped FeSe.
Subject AreaScience & Technology - Other Topics
Indexed BySCI ; ADS
WOS Research AreaMultidisciplinary Sciences
WOS SubjectScience & Technology - Other Topics
WOS IDWOS:000352030700001
ADS Bibcode2015NatSR...5E9477I
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015NatSR...5E9477I
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015NatSR...5E9477I/citations
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Cited Times:12 [ADS]
Document Type期刊论文
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GB/T 7714
Izumi, M,Zheng, L,Sakai, Y,et al. Emergence of double-dome superconductivity in ammoniated metal-doped FeSe[J]. SCIENTIFIC REPORTS,2015,5:9477.
APA Izumi, M.,Zheng, L.,Sakai, Y.,Goto, H.,Sakata, M.,...&李延春.(2015).Emergence of double-dome superconductivity in ammoniated metal-doped FeSe.SCIENTIFIC REPORTS,5,9477.
MLA Izumi, M,et al."Emergence of double-dome superconductivity in ammoniated metal-doped FeSe".SCIENTIFIC REPORTS 5(2015):9477.
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