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相关论文: Contrasting Pressure Effects in Sr2VFeAsO3 and Sr2…

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We report resistivity measurement under pressure in single crystals of SrFe_2As_2, which is one of the parent materials of Fe-based superconductors. The structural and antiferromagnetic (AFM) transition of T_0 = 198 K at ambient pressure is…

超导电性 · 物理学 2009-11-13 H. Kotegawa , H. Sugawara , H. Tou

We report the pressure dependences of the superconducting transition temperature (T_c) in several perovskite-type Fe-based superconductors through the resistivity measurements up to ~4 GPa. In Ca_4(Mg,Ti)_3Fe_2As_2O_y with the highest T_c…

We report the impact of hydrostatic pressure on the superconductivity and normal state resistivity of FeTe0.5Se0.5 superconductor. At the ambient pressure the FeTe0.5Se0.5 compound shows the superconducting transition temperature Tconset at…

超导电性 · 物理学 2014-07-23 Rajveer Jha , Rayees A. Zargar , A. K. Hafiz , H. Kishan , V. P. S. Awana

Electrical resistivity under high pressure have been measured on nominally pure SrFe2As2 up to 14 GPa. The resistivity drop appeared with increasing pressure, and we clearly observed zero resistivity. The maximum of superconducting…

超导电性 · 物理学 2009-02-10 K. Igawa , H. Okada , H. Takahashi , S. Matsuishi , Y. Kamihara , M. Hirano , H. Hosono , K. Matsubayashi , Y. Uwatoko

Here we report pressure effect on superconducting transition temperature (Tc) of ReFeAsO0.85 (Re= Sm and Nd) system without fluorine doping. In-situ measurements under high pressure showed that Tc of the two compounds decrease monotonously…

超导电性 · 物理学 2010-09-03 W. Yi , L. Sun , Z. Ren , X. Dong , H. Zhang , X. Dai , Z. Fang , G. Che , J. Yang , Z. Li , X. Shen , F. Zhou , Z. Zhao

We have performed several high-pressure resistivity experiments on the recently discovered superconductors La[O_{0.89}F_{0.11}]FeAs and Ce[O_{0.88}F_{0.12}]FeAs. At ambient pressure, these materials have superconducting onset temperatures…

We performed the high hydrostatic pressure resistivity measurements (up to 1.7 GPa) on the newly discovered superconductors $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) single crystals. Two batches of single crystals $K_xFe_2Se_2$ with different…

High pressure effects on the superconducting transitions of beta-pyrochlore superconductors AOs2O6 (A = Cs, Rb, K) are studied by measuring resistivity under high pressures up to 10 GPa. The superconducting transition temperature Tc first…

超导电性 · 物理学 2009-11-11 T. Muramatsu , N. Takeshita , C. Terakura , H. Takagi , Y. Tokura , S. Yonezawa , Y. Muraoka , Z. Hiroi

We report the impact of hydrostatic pressure (0-1.97GPa) on superconductivity of recently discovered 2K superconductor Sr0.5La0.5FBiS2. Resistivity under pressure measurements are performed by using HPC-33 Piston type pressure cell with…

超导电性 · 物理学 2015-06-18 Rajveer Jha , Brajesh Tiwari , V. P. S. Awana

We investigated the pressure effects on the FeSe superconductor and the related compounds. Pressure dependence of superconducting transition temperature (Tc) for FeSe0.8S0.2 exhibits a dome-shaped behavior below 0.76 GPa. On the other hand,…

The effect of hydrostatic pressure on the superconductivity in LiFeAs is investigated up to 1.8 GPa. The superconducting transition temperature, T_c, decreases linearly with pressure at a rate of 1.5 K/GPa. The negative pressure coefficient…

超导电性 · 物理学 2009-01-29 M. Gooch , B. Lv , J. H. Tapp , Z. Tang , B. Lorenz , A. M. Guloy , P. C. W. Chu

The temperature dependence of the ac susceptibility for single-crystalline Fe1.02Se has been measured at high pressures to 6.7 GPa. The superconducting transition temperature Tc displays a large increase from 7 K to 30 K in the two-phase…

超导电性 · 物理学 2013-05-29 V. G. Tissen , E. G. Ponyatovskii , M. V. Nefedova , A. N. Titov , V. V. Fedorenko

SrxBi2Se3 is recently reported to be a superconductor derived from topological insulator Bi2Se3. It shows a maximum resistive Tc of 3.25 K at ambient pressure. We report magnetic (upto 1 GPa) and transport properties (upro 8 Gpa) under…

The pressure induced superconductivity and structural evolution for Bi2Se3 single crystal have been studied. The emergence of superconductivity with onset transition temperature (Tc) about 4.4K is observed around 12GPa. Tc increases rapidly…

超导电性 · 物理学 2015-06-15 P. P. Kong , J. L. Zhang , S. J. Zhang , J. Zhu , Q. Q. Liu , R. C. Yu , Z. Fang , C. Q. Jin , W. G. Yang , X. H. Yu , J. L. Zhu , Y. S. Zhao

We report that the pressure-temperature phase diagram of single-crystalline SrFe$_2$As$_2$ is easily affected by the hydrostaticity of a pressure-transmitting medium. For all of the three mediums we used, superconductivity with zero…

超导电性 · 物理学 2015-05-13 H. Kotegawa , T. Kawazoe , H. Sugawara , K. Murata , H. Tou

We present a systematic pressure study of poly- and single crystalline SrFe2As2 by electrical resistivity and X-ray diffraction measurements. SrFe2As2 exhibits a structural phase transition from a tetragonal to an orthorhombic phase at…

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…

超导电性 · 物理学 2015-05-13 C. W. Chu , B. Lorenz

Tetragonal FeSe is a superconductor with a transition temperature Tc of 8 K and shows a huge enhancement of Tc with applying pressure. Tetragonal FeTe has a structure very analogous to superconducting FeSe, but does not show superconducting…

超导电性 · 物理学 2009-08-09 Y. Mizuguchi , F. Tomioka , S. Tsuda , T. Yamaguchi , Y. Takano

High-pressure superconductivity in a rare-earth doped Ca0.86Pr0.14Fe2As2 single crystalline sample has been studied up to 12 GPa and temperatures down to 11 K using designer diamond anvil cell under a quasi-hydrostatic pressure medium. The…

Through the solid state reaction method, we synthesized a new BiSe2-based superconductor Sr0:5La0:5FBiSe2 with superconducting transition temperature Tc?3.8 K. A strong diamagnetic signal below Tc in susceptibility ?(T) is observed…

超导电性 · 物理学 2016-05-02 Lin Li , Yongliang Xiang , Yihong Chen , Wenhe Jiao , Chuhang Zhang , Li Zhang , Jianhui Dai , Yuke Li
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