2007/05/22 by Ofer Yuli, Itay Asulin, Gad Koren +2 · 13 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Conductance #Crystallography #Cuprate #Doping #Magnetic and transport properties of perovskites and related materials #Materials science #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Quantum tunnelling #Scanning tunneling spectroscopy #Spectroscopy #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.75.184521
published in Physical Review B 75(18) (American Physical Society) · 15 pages, 6 figures
openalex publication_date 2007/05/22 · arxiv created 2007/07/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using scanning tunneling spectroscopy we examined the local density of states of thin c-axis La_2\ensuremath-xSrxCuO4 films, over wide doping and temperature ranges. We found that the pseudogap exists only at doping levels lower than optimal. For x=0.12, close to the ``anomalous'' x=(1)/(8) doping level, a zero-bias conductance peak was the dominant spectral feature, instead of the excepted V-shaped (c-axis tunneling) gap structure. We have established that this surprising effect cannot be explained by tunneling into (110) facets. Possible origins for this unique behavior are discussed.