2012/07/15 by E. Razzoli, G. Drachuck, Gil Drachuck +10 · 62 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Angle-resolved photoemission spectroscopy #Condensed matter physics #Cuprate #Doping #Electronic structure #Fermi surface #Magnetic and transport properties of perovskites and related materials #Pairing #Photoemission spectroscopy #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spectral line #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.110.047004
published in Physical Review Letters 110(4), 047004 (American Physical Society) · 5 pages, 4 figures
arxiv created 2012/07/15 · openalex publication_date 2013/01/25 · arxiv updated 2013/01/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using angle-resolved photoemission spectroscopy (ARPES), it is revealed that the low-energy electronic excitation spectra of highly underdoped superconducting and nonsuperconducting La(2-x)Sr(x)CuO(4) cuprates are gapped along the entire underlying Fermi surface at low temperatures. We show how the gap function evolves to a d(x(2)-y(2)) form with increasing temperature or doping, consistent with the vast majority of ARPES studies of cuprates. Our results provide essential information for uncovering the symmetry of the order parameter(s) in strongly underdoped cuprates, which is a prerequisite for understanding the pairing mechanism and how superconductivity emerges from a Mott insulator.