Superconductivity and charge-carrier localization in ultrathin La1.85Sr0.15CuO4/La2CuO4 bilayers
نویسندگان
چکیده
Superconductivity and charge-carrier localization in ultrathin La1.85Sr0.15CuO4/La2CuO4 bilayers K. Sen,1,* P. Marsik,1 S. Das,1,† E. Perret,1 R. de Andres Prada,1 A. Alberca,1,2 N. Biškup,3,4 M. Varela,3 and C. Bernhard1,‡ 1University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Chemin du Musée 3, CH-1700, Fribourg, Switzerland 2Swiss Light Source, Paul Scherrer Institut, CH-5232, Villigen PSI, Switzerland 3Departamento de Física Aplicada III, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Madrid 28010, Spain 4Centro Nacional de Microscopía Electrónica, Universidad Complutense de Madrid, Madrid 28040, Spain (Received 23 February 2017; published 6 June 2017)
منابع مشابه
Anomalous carrier density independent superconductivity in iron pnictides
Dome-shape superconductivity phase diagram can commonly be observed in cuprateand iron-based systems via tuning parameters such as charge carrier doping, pressure, bond angle, and etc. We report doping electrons from transition-metal elements (TM = Co, Ni) substitution can induce high-Tc superconductivity around 35 K in Ca0.94La0.06Fe2As2, which emerges abruptly before the total suppression of ...
متن کاملMetallic nonsuperconducting phase and D-wave superconductivity in Zn-substituted La1.85Sr0.15CuO4
Measurements of the resistivity, magnetoresistance, and penetration depth were made on films of La1.85Sr0.15CuO4, with up to 12 at. % of Zn substituted for the Cu. The results show that the quadratic temperature dependence of the inverse square of the penetration depth, indicative of d-wave superconductivity, is not affected by doping. The suppression of superconductivity leads to a metallic no...
متن کاملNovel Insulator to Metal Transition and Superconductivity in Sr-doped La2CuO4
We have studied the charge dynamics of Sr-doped La2CuO4 at hole concentration p = 0.07. We observed a clear indication of the competition between two Wigner lattice orders: One corresponds to a Tc = 15 K superconductivity and the other to Tc = 30K. Our results naturally explain the recent observation of metallic transport in extremely low (1%) Sr-doped La2CuO4 and establish a novel insulator to...
متن کاملگرما الکتریسته و شواهد جایگزیده شدن حاملها درابررساناهای Y1-2xCaxThxBa2Cu3O7-δ
In this study polycrystaline samples of Y1-2xCaxThxBa2Cu3O7-δ with x=0, 0.025, 0.05, 0.075 were made by standard solid state methods. The transport and superconducting properties have been studied by the thermoelectric power S(x,T) measurements as a function of temperature and doping concentration. The critical temperature decreased linearly by increasing the doping concentration. S(x,T) was a...
متن کاملSelf-optimized superconductivity attainable by interlayer phase separation at cuprate interfaces
Stabilizing superconductivity at high temperatures and elucidating its mechanism have long been major challenges of materials research in condensed matter physics. Meanwhile, recent progress in nanostructuring offers unprecedented possibilities for designing novel functionalities. Above all, thin films of cuprate and iron-based high-temperature superconductors exhibit remarkably better supercon...
متن کامل