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We examine the possibility of high temperature superconductivity from two-dimensional semiconductor without antiferromagnetic fluctuations. The weak coupling BCS theory is applied, especially where the Fermi level is near the bottom of the…

超导电性 · 物理学 2007-05-23 Mahito Kohmoto , Iksoo Chang , Jacques Friedel

Superconductivity was achieved in PrFeAsO by partially substituting Pr^{3+} with Sr^{2+}. The electrical transport properties and structure of this new superconductor Pr_{1-x}Sr_xFeAsO at different doping levels (x = 0.05$\sim$ 0.25) were…

超导电性 · 物理学 2009-03-24 Gang Mu , Bin Zeng , Xiyu Zhu , Fei Han , Peng Cheng , Bing Shen , Hai-Hu Wen

We predict by first principles calculations that the recently prepared borophene is a pristine two-dimensional (2D) monolayer superconductor, in which the superconductivity can be significantly enhanced by strain and charge carrier doping.…

超导电性 · 物理学 2017-01-09 R. C. Xiao , D. F. Shao , W. J. Lu , H. Y. Lv , J. Y. Li , Y. P. Sun

The temperature ($T$) and magnetic field ($H$) dependence of the magnetic penetration depth, $\lambda(T,H)$, in Ca(Al$_{0.5}$Si$_{0.5}$)$_2$ exhibits significant deviation from that expected for conventional BCS superconductors. In…

超导电性 · 物理学 2015-06-24 S. Kuroiwa , H Takagiwa , M. Yamazawa , J. Akimitsu , K. Ohishi , A. Koda , W. Higemoto , R. Kadono

The recent discovery of superconductivity at 190~K in highly compressed H$_{2}$S is spectacular not only because it sets a record high critical temperature, but because it does so in a material that appears to be, and we argue here that it…

超导电性 · 物理学 2015-03-05 N. Bernstein , C. S. Hellberg , M. D. Johannes , I. I. Mazin , M. J. Mehl

The effect of off-plane impurity on superconductivity and non-Fermi-liquid (NFL) behavior in the layered heavy-fermion compound CeCo$_{1-x}$Ni$_x$In$_5$ is investigated by specific heat, magnetization, and electrical resistivity…

The discovery of superconductivity in Magnesium Diborate (MgB$_2$) has stimulated great interest in the search of new superconductors with similar lattice structures. Unlike cuprate or iron-based superconductors, MgB$_2$ is indisputably a…

超导电性 · 物理学 2015-01-26 Miao Gao , Zhong-Yi Lu , Tao Xiang

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…

In this paper, the completed investigation of a possible superconducting phase in monolayer indium selenide is determined using first-principles calculations for both the hole and electron doping systems. The hole-doped dependence of the…

材料科学 · 物理学 2021-01-19 Mohammad Alidoosti , Davoud Nasr Esfahani , Reza Asgari

We examine the effect of boron doping in superconducting forms of amorphous carbon. By judiciously optimizing boron substitutional sites in simulated amorphous carbon we predict a superconducting transition temperature near 37 K at 14 %…

超导电性 · 物理学 2018-02-07 Yuki Sakai , James R. Chelikowsky , Marvin L. Cohen

A theory of strongly correlated electron or hole liquids with the fermion condensate is presented and applied to the consideration of quasiparticle excitations in high temperature superconductors, in their superconducting and normal states.…

强关联电子 · 物理学 2007-05-23 V. R. Shaginyan

We report superconductivity in polycrystalline samples of the 1038-type compounds (Ca$_{1-x}$RE$_x$)$_{10}$(FeAs)$_{10}$(Pt$_3$As$_8$) up to T$_c$ = 35 K with RE = Y, La-Nd, Sm, Gd-Lu. The critical temperatures are independent of the…

超导电性 · 物理学 2014-10-29 Tobias Stürzer , Gerald Derondeau , Dirk Johrendt

We report superconductivity in the SmFe0.9Co0.1AsO system being prepared by most easy and versatile single step solid-state reaction route. The parent compound SmFeAsO is non-superconducting but shows the spin density wave (SDW) like…

超导电性 · 物理学 2012-01-23 V. P. S. Awana , Arpita Vajpayee , Anand Pal , Monika Mudgel , R. S. Meena , H. Kishan

Here we report a new class of superconductors prepared by high pressure synthesis in the quaternary family ReFeAsO1-delta (Re = Sm, Nd, Pr, Ce, La) without fluorine doping. The onset superconducting critical temperature (Tc) in these…

We report the influence on the superconducting critical temperature $T_c$ in doped SrTiO$_3$ of the substitution of the natural $^{16}$O atoms by the heavier isotope $^{18}$O. We observe that for a wide range of doping this substitution…

超导电性 · 物理学 2016-11-03 A. Stucky , G. Scheerer , Z. Ren , D. Jaccard , J. -M. Poumirol , C. Barreteau , E. Giannini , D. van der Marel

We report appearance of superconductivity at 5K in NdO0.5F0.5BiS2 and supplement the discovery [1] of the same in layered sulfide based ZrCuSiAs type compounds. The bulk polycrystalline compound is synthesized by conventional solid state…

超导电性 · 物理学 2015-06-11 Rajveer Jha , Anuj Kumar , Shiva Kumar Singh , V. P. S. Awana

The superconductor Sr4V2O6Fe2As2 with transition temperature at 37.2 K has been fabricated. It has a layered structure with the space group of p4/nmm, and with the lattice constants a = 3.9296Aand c = 15.6732A. The observed large…

超导电性 · 物理学 2015-05-13 Xiyu Zhu , Fei Han , Gang Mu , Peng Cheng , Bing Shen , Bin Zeng , Hai-Hu Wen

We predict that electron-doped silicene is a good two-dimensional electron-phonon superconductor under biaxial tensile strain by first-principles calculations within rigid band approximation. Superconductivity transition temperature of…

超导电性 · 物理学 2013-11-27 Wenhui Wan , Yanfeng Ge , Fan Yang , Yugui Yao

The recent discovery of superconductivity in iron-arsenic compounds below a transition temperature (Tc) as high as 55K ended the monopoly of copper oxides (cuprates) in the family of high-Tc superconductors. A critical issue in…

The superconducting transition temperature, $T_{\rm{c}}$, of FeSe can be significantly enhanced several-fold by applying pressure, electron doping, intercalating spacing layer, and reducing dimensionality. Various ordered electronic phases,…

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