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We present a theory for the pseudo-gap state recently observed at the LaAlO3/SrTiO3 interface, based on superconducting islands embedded in a metallic background. Superconductivity within each island is BCS-like, and the local critical…

超导电性 · 物理学 2015-02-18 D. Bucheli , S. Caprara , M. Grilli

Detailed temperature dependence of both superconducting gaps was obtained directly by means of SnS-Andreev spectroscopy. The \Delta \sigma,\pi(T) -curves were shown to be deviated from standard BCS-like behavior, due to k-space proximity…

超导电性 · 物理学 2012-04-24 S. A. Kuzmichev , T. E. Shanygina , S. N. Tchesnokov , S. I. Krasnosvobodtsev

We report on first principles calculations of superconductivity in a single layer of lead on a silicon substrate including a full treatment of phononic and RPA screened coulomb interactions within the parameter free framework of Density…

超导电性 · 物理学 2015-03-04 A. Linscheid , A. Sanna , E. K. U. Gross

We present the results of measurements of the thermal and electrical conductivity in the basal plane of single-crystalline MgB_2 between 2 and 300 K. The analysis of the temperature dependence of the thermal conductivity gives supporting…

超导电性 · 物理学 2007-05-23 A. V. Sologubenko , J. Jun , S. M. Kazakov , J. Karpinski , H. R. Ott

We consider a hybrid structure where a material with Rashba-like spin-orbit coupling is proximity coupled to a conventional superconductor. We find that the superconducting critical temperature $T_c$ can be tuned by rotating the vector…

超导电性 · 物理学 2020-09-08 Lina G. Johnsen , Kristian Svalland , Jacob Linder

We report the precise pressure dependence of FeSe from a resistivity measurement up to 4.15 GPa. Superconducting transition temperature (T_c) increases sensitively under pressure, but shows a plateau between 0.5-1.5 GPa. The maximum T_c,…

超导电性 · 物理学 2015-05-13 S. Masaki , H. Kotegawa , Y. Hara , H. Tou , K. Murata , Y. Mizuguchi , Y. Takano

We present a study of the superconducting properties of the candidate topological superconductor Ti_(3)Sb. Electrical transport measurements show zero resistance with a T_(c,onset) of ~ 5.9 K with a transition width {\Delta}T_c~ 0.6 K. The…

超导电性 · 物理学 2023-03-15 R. Chapai , M. P. Smylie , H. Hebbeker , D. Y. Chung , W. -K. Kwok , J. F. Mitchell , U. Welp

We investigate the temperature dependence of the lower critical field Hc1(T) of a high-quality FeSe single crystal under static magnetic fields H parallel to the c axis. The temperature dependence of the first vortex penetration field has…

A fundamental question of high-temperature superconductors is the nature of the pseudogap phase which lies between the Mott insulator at zero doping and the Fermi liquid at high doping p. Here we report on the behaviour of charge carriers…

The temperature dependence of upper critical field B_c2 was determined from the shift of resistive transition \Delta T(B) in nearly optimally doped Nd_{2-x}Ce_xCuO_{4-y} single crystals. Within the experimental accuracy, the weak-field data…

超导电性 · 物理学 2009-11-07 V. F. Gantmakher , G. A. Emelchenko , I. G. Naumenko , G. E. Tsydynzhapov

beta-Bi2Pd compound has been proposed as another example of a multi-gap superconductor [Y. Imai et al., J. Phys. Soc. Jap. 81, 113708 (2012)]. Here, we report on measurements of several important physical quantities capable to show a…

Normal-metal films overlaid with arrays of superconducting islands undergo Berezinskii-Kosterlitz-Thouless (BKT) superconducting transitions at a temperature $T_{BKT}$. We present measurements of T$_{BKT}$ for arrays of mesoscopic Nb…

超导电性 · 物理学 2015-12-17 Serena Eley , Sarang Gopalakrishnan , Paul M. Goldbart , Nadya Mason

We propose a model and derive analytical expressions for conductivity in heterogeneous fully anisotropic conductors with ellipsoid superconducting inclusions. This model and calculations are useful to analyze the observed temperature…

超导电性 · 物理学 2018-10-02 S. S. Seidov , K. K. Kesharpu , P. I. Karpov , P. D. Grigoriev

Defects are crucial in determining the overall physical properties of semiconductors. Generally, the charge-state transition level (TEL), one of the key physical quantities that determines the dopability of defects in semiconductors, is…

材料科学 · 物理学 2022-03-23 Shuang Qiao , Yu-Ning Wu , Xiaolan Yan , Bartomeu Monserrat , Su-Huai Wei , Bing Huang

In the last 60 years conventional solid and electrolyte gating allowed sizable modulations of the surface carrier concentration in metallic superconductors resulting in tuning their conductivity and changing their critical temperature.…

The thermopower S of the high-Tc superconductor La(1.6-x)Nd(0.4)Sr(x)CuO(4) was measured as a function of temperature T near its pseudogap critical point, the critical hole doping p* where the pseudogap temperature T* goes to zero. Just…

We report on low-temperature electronic transport measurements of a silicon metal-oxide-semiconductor quantum dot, with independent gate control of electron densities in the leads and the quantum dot island. This architecture allows the dot…

介观与纳米尺度物理 · 物理学 2015-05-14 W. H. Lim , F. A. Zwanenburg , H. Huebl , M. Mottonen , K. W. Chan , A. Morello , A. S. Dzurak

This paper demonstrates the method of estimation of critical temperature Tc value of high-temperature superconductors from the dispersive part of AC susceptibility measurement using a pair of neural networks.

A single electron transistor based on Al-AlO_x-Nb tunnel junctions was fabricated by shadow evaporation and in situ barrier formation. Its output current noise was measured, using a transimpedance amplifier setup, as a function of bias…

介观与纳米尺度物理 · 物理学 2009-10-31 Torsten Henning , B. Starmark , T. Claeson , P. Delsing

The discovery of superconductivity of about 30 K in iron selenides with very large magnetic moments simulates the examination of completing orders. Here we report a finding of pressure- induced suppression of the superconducting transition…