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首页> 外文期刊>Physica, C. Superconductivity and its applications >High pressure studies on Fe-pnictide superconductors
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High pressure studies on Fe-pnictide superconductors

机译：铁氧超导体的高压研究

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A review of high pressure studies on Fe-pnictide superconductors is given. The pressure effects on the magnetic and superconducting transitions are discussed for different classes of doped and undoped FeAs-compounds: ROFeAs (R = rare-earth), AeFe(2)As(2) (Ae = Ca, Sr, Ba), and AFeAs (A = Li, Na). Pressure tends to decrease the magnetic transition temperature in the undoped or only slightly doped compounds. The Superconducting Tc increases with low pressure for uderdoped FeAs-pnictides, remains approximately constant for optimal doping, and decreases linearly in the overdoped range. The undoped LaOFeAs and AeFe(2)As(2) become superconducting under pressure although non-hydrostatic pressure condition seems to play a role in CaFe2As2. The Superconductivity in the (undoped) AFeAs is explained as a chemical pressure effect due to the Volume contraction caused by the small ionic size of the A-elements. The binary FeSe shows the largest pressure coefficient of Tc in the Se-deficient superconducting phase. (C) 2009 Elsevier B.V. All rights reserved.
机译：综述了对超铁氧体超导体的高压研究。讨论了不同类型的掺杂和未掺杂FeAs化合物对磁性和超导转变的压力影响：ROFeAs（R =稀土），AeFe（2）As（2）（Ae = Ca，Sr，Ba）和AFeAs（A = Li，Na）。压力趋于降低未掺杂或仅轻度掺杂的化合物中的磁性转变温度。对于超掺杂的FeAs肽，超导Tc随低压而增加，对于最佳掺杂而言保持近似恒定，而在超掺杂范围内则呈线性下降。尽管非静水压条件似乎在CaFe2As2中起作用，但未掺杂的LaOFeAs和AeFe（2）As（2）在压力下变得超导。 （未掺杂的）AFeAs中的超导性被解释为由于A元素的小离子尺寸引起的体积收缩而引起的化学压力效应。二元FeSe在缺硒超导相中显示出最大的Tc压力系数。 （C）2009 Elsevier B.V.保留所有权利。

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