Zero energy states at a normal-metal/cuprate-superconductor interface probed by shot noise

2017/07/02 by O. Negri, Ori Negri, Moran Zaberchik +5
Physics and Astronomy · #Computer science #Condensed matter physics #Cuprate #Materials science #Noise (video) #Optics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Shot noise #Superconductivity #Zero (linguistics) #Zero-point energy #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.97.214504

published as Phys. Rev. B 97, 214504 (2018)

arxiv created 2017/07/02 · openalex created_date 2017/07/14 · openalex publication_date 2018/06/11 · arxiv updated 2018/06/20 · openalex updated_date 2026/08/05

Abstract

We report measurements of the current noise generated in the optimally doped, x=0.15, Au-La_2\ensuremath-xSr_xCuO₄ junctions. For high transmission junctions on a (110) surface, we observed a split zero-bias conductance peak (ZBCP), accompanied by enhanced shot noise. We observed no enhanced noise neither in low-transmission junctions on a (110) surface nor in any junction on a (100) surface. We attribute the enhanced noise to Cooper pair transport through the junctions.

Citations

• Direct observation of a fractional charge
• Interplay between single-particle and two-particle tunneling in normal metal–d-wave superconductor junctions probed by shot noise
• Local and macroscopic tunneling spectroscopy ofY1−xCaxBa2Cu3O7−δfilms: Evidence for a doping-dependentisoridxycomponent in the order parameter
• Doping Dependence of Two Energy Scales in the Tunneling Spectra of Superconducting La2-xSrxCuO4
• Shot Noise in Mesoscopic Conductors