Volume 83, Number 5, September 2008
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||06 August 2008|
Pressure effect on superconductivity of iron-based arsenic-oxide ReFeAsO0.85 (Re = Sm and Nd)
Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - Beijing 100190, PRC
Accepted: 24 July 2008
Here we report pressure effects on the superconducting transition temperature of the ReFeAsO0.85 (Re = Sm and Nd) system without fluorine doping. In situ measurements under high pressure showed that of the two compounds decreases monotonously over the pressure range investigated. The pressure coefficients in SmFeAsO0.85 and NdFeAsO0.85 were different, revealing the important influence of the deformation in layers on . Theoretical calculations suggested that the electron density of states decreases with increasing pressure, following the same trend of experimental data.
PACS: 74.70.-b – Superconducting materials / 62.50.-p – High-pressure effects in solids and liquids
© EPLA, 2008
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