Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor
نویسندگان
چکیده
منابع مشابه
Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system.
We report time-resolved measurements of the photoinduced change in reflectivity, DeltaR, in the Bi2Sr2Ca(1-y)Dy(y)Cu2O8+delta (BSCCO) system of cuprate superconductors as a function of hole concentration. We find that the kinetics of quasiparticle decay and the sign of DeltaR both change abruptly where the superconducting transition temperature T(c) is maximal. These coincident changes suggest ...
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A microscopic theory is presented for the observed electronic disorder in superconducting Bi2Sr2CaCu2O8+delta. The essential phenomenology is shown to be consistent with the existence of two types of interstitial oxygen dopants: those serving primarily as charge reservoirs and those close to the apical plane contributing both carriers and electrostatic potential to the CuO2 plane. The nonlinear...
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Close to a zero-temperature transition between ordered and disordered electronic phases, quantum fluctuations can lead to a strong enhancement of electron mass and to the emergence of competing phases such as superconductivity. A correlation between the existence of such a quantum phase transition and superconductivity is quite well established in some heavy fermion and iron-based superconducto...
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Zhenhua Ning Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA (Dated: December 13, 2006) Abstract This paper tries to give a clear description of the motion of vortex and the vortex glass transitions in high Tc superconductors from both theoretical analysis and experimental observation. Then a controversy of the location of the vortex glass transition in ...
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3⁄4We measured a signal current waveform by using a high-Tc superconductor (HTS) sampler with a 1-ps delay between every sampling point. The maximum time differential obtained in the measured waveform was 12 mA/ps with 2.5-mA current sensitivity at 25 K. This result guarantees that the sampler is able to measure current waveforms correctly when their maximum time differential is less than 12 mA...
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ژورنال
عنوان ژورنال: Science
سال: 2015
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aaa4990