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- W1968055173 abstract "We investigated the effects of phosphorus substitution on the shape of the Tc(x) dome in 1111-type SmFeAs1-yPyO1-xHx (0 < x < 0.5). Hydride ion substitution of oxide sites (O2- -> H-) exerts a chemical pressure effect, i.e., a structural reduction of the Pn-Fe-Pn angle {alpha} (Pn = P, As) and also dopes electrons into the FePn layer to induce superconductivity. Isovalent phosphorus substitution (P3- -> As3-) can induce only a chemical pressure effect, i.e., an increase of {alpha} for La-substitution of Sm-sites. As y increases from 0.0 to 0.5, the single Tc dome gradually splits into two domes, similar to those of LaFeAsO1-xHx with a Tc valley at x ~ 0.16. We found that the Tc valley is located around (x, {alpha}) ~ (0.16, 113{deg}) for both SmFeAs1-yPyO1-xHx and LaFeAsO1-xHx series, irrespective of changes in the Pn anion and Ln cation species. This result suggests that suppression of Tc leads to the emergence of a Tc valley when both the shape of FePn4 tetrahedra represented by {alpha} and electron doping level of x meet the above criterion in 1111 type iron oxypnictide superconductors." @default.
- W1968055173 created "2016-06-24" @default.
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- W1968055173 date "2014-03-11" @default.
- W1968055173 modified "2023-09-27" @default.
- W1968055173 title "Controlling factors of <i>T<span class=aps-inline-formula><math><msub><mrow></mrow><mi>c</mi></msub></math></span></i> dome structure in 1111-type iron arsenide superconductors" @default.
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- W1968055173 doi "https://doi.org/10.1103/physrevb.89.094510" @default.
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