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Static and dynamic transport measurements on stacks of intrinsic Josephson junctions on Bi2Sr2CaCu2O8+delta single crystals, near to optimal doping, are presented. The zero bias minimum in dynamic conductance is consistent with a normal…

超导电性 · 物理学 2007-05-23 I. F. G. Parker , M. Endres , P. J. Thomas , G. Yang , A. Yurgens , C. E. Gough

We present a combined growth and transport study of superconducting single-crystalline NdO$_{0.5}$F$_{0.5}$BiS$_2$. Evidence of two-dimensional superconductivity with significant phase fluctuations of preformed Cooper pairs preceding the…

The thermodynamic properties of the superconducting state in the amorphous ${\rm Sn_{1-x}Cu_{x}}$ thin films have been characterized. The concentration of copper changes in the range from $0.08$ to $0.41$. The calculations have been…

超导电性 · 物理学 2016-10-23 E. A. Drzazga , R. Szczęśniak , I. A. Domagalska , and K. Piwowarska

The quest for high-temperature superconductivity at ambient pressure is a central issue in physics. In this regard, the relationship between unconventional superconductivity and the quantum critical point (QCP) associated with the…

One of the most strikingly universal features of the high temperature superconductors is that the superconducting phase emerges in the close proximity of the antiferromagnetic phase, and the interplay between these two phases poses a long…

Superconductivity in the C32 compounds CaAlSi and SrAlSi is investigated by heat capacity (Cp) measurements as well as high-pressure ac-susceptibility experiments. The heat capacity in the superconducting state is well explained by the BCS…

超导电性 · 物理学 2009-11-10 B. Lorenz , J. Cmaidalka , R. L. Meng , C. W. Chu

We have fabricated superconductor-normal metal side-junctions with different barrier transparencies out of PdTe$_2$ crystalline flakes and measured the differential conductance spectra. Modeling our measurements using a modified Blonder…

超导电性 · 物理学 2019-02-01 J. A. Voerman , J. C. de Boer , T. Hashimoto , Yingkai Huang , Chuan Li , A. Brinkman

Here we report further investigation on the thermodynamic, and transport properties, and the first assessment of theoretical calculations for the BiS2-layered Bi3O2S3 superconductor. The polycrystalline sample is synthesized with the…

超导电性 · 物理学 2015-06-23 L. Li , D. Parker , P. Babkevich , L. Yang , H. M. Ronnow , A. S. Sefat

The superconducting gap - an energy scale tied to the superconducting phenomena-opens on the Fermi surface at the superconducting transition temperature (TC) in conventional BCS superconductors. Quite differently, in underdoped high-TC…

We have performed temperature dependent tunneling spectroscopy on an impurity-free surface area of a LiFeAs single crystal. Our data reveal a highly unusual temperature evolution of superconductivity: at $T_c^*=18$~K a partial…

超导电性 · 物理学 2016-06-16 P. K. Nag , R. Schlegel , D. Baumann , H. -J. Grafe , R. Beck , S. Wurmehl , B. Büchner , C. Hess

We have investigated the ternary noncentrosymmetric superconductors TaXSi (X=Re, Ru) by magnetization, resistivity, and specific heat measurements. The samples crystallize in orthorhombic TiFeSi structure having superconducting transition…

超导电性 · 物理学 2021-08-19 Sajilesh K. P. , R. P. Singh

We investigate the superconducting gap function of topological superconductor PbTaSe$_2$. Temperature, magnetic field, and three-dimensional (3D) field-angle dependences of the specific heat prove that the superconductivity of PbTaSe$_2$ is…

Superconducting properties of the polycrystalline Zr2Ru3Si4 were investigated by the electrical resistivity, magnetization and specific heat. By these measurements, bulk superconductivity with transition temperature Tc = 5.5 K was…

超导电性 · 物理学 2014-01-09 Soshi Ibuka , Motoharu Imai , Takashi Naka , Mitsuaki Nishio

The cuprate Hg0.8Tl0.2Ba2Ca2Cu3O8.33 exhibits the highest superconducting transition temperature Tc of 138K. Achieving superconductivity at even higher temperatures, up to room temperature, represents the ultimate dream of humanity. As…

超导电性 · 物理学 2026-02-10 Jun-jie Shi , Juan Du , Yao-hui Zhu

We have performed an isovalent substitution study in a layered titanium oxypnictide system BaTi$_{2}$(Sb$_{1-x}$Bi$_{x}$)$_{2}$O (0$\leq x\leq$ 0.40) by the measurements of x-ray diffraction, electrical resistivity and magnetic…

Tunneling spectra are reported for Bi_{2}Sr_{2}CaCu_{2}O_{8+\delta} (Bi-2212) over a wide doping range using superconductor-insulator-superconductor (SIS) break junctions. The energy gap inferred from the tunneling data displays a…

超导电性 · 物理学 2015-06-25 L. Ozyuzer , J. F. Zasadzinski , N. Miyakawa

Thin film junctions and bilayers of the doped topological insulator $\rm Bi_2Se_3$ and the s-wave superconductor NbN were found to exhibit conductance spectra with prominent zero bias and coherence peaks. Various tunneling models with…

超导电性 · 物理学 2015-06-15 Gad Koren , Tal Kirzhner , Yoav Kalcheim , Oded Millo

High-temperature superconductors (high-Tc SCs) host a rich landscape of electronic phases encompassing the pseudogap, strange metal, superconducting, antiferromagnetic insulating, and Fermi-liquid regimes. The superconducting phase is…

We performed low temperature shot noise measurements in Superconductor (TiN) - strongly disordered normal metal (heavily doped Si) weakly transparent junctions. We show that the conductance has a maximum due to coherent multiple reflections…

介观与纳米尺度物理 · 物理学 2009-11-07 F. Lefloch , C. Hoffmann , M. Sanquer , D. Quirion

We report the discovery of structural phase transitions and superconductivity in the full Heusler compounds $X$Pd$_2$Sn ($X$ = Ti, Zr, Hf), by means of electrical transport, magnetic susceptibility, specific heat and x-ray diffraction…

超导电性 · 物理学 2023-03-07 Hang Su , Feng Du , Rui Li , Shuaishuai Luo , Yuxuan Chen , Jiyong Liu , Ye Chen , Chao Cao , Michael Smidman , Huiqiu Yuan