2000/06/30 by V. M. Krasnov, A.E. Kovalev, A. E. Kovalev +2 · 4 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Cuprate #Field (mathematics) #Iron-based superconductors research #Magnetic field #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Quantum tunnelling #Quasiparticle #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.86.2657
published as Phys.Rev.Lett. 86, 2657 (2001) · 4 pages, 4 eps figures
arxiv created 2000/07/20 · openalex publication_date 2001/03/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Intrinsic tunneling spectroscopy in high magnetic field (H) is used for a direct test of superconducting features in the quasiparticle density of states of pure Bi2212 and intercalated HgBr2-Bi2212 high- T(c) superconductors. We were able to distinguish with great clarity two coexisting gaps: (i) the superconducting gap, which closes as H-->H(c2)(T), and (ii) the c-axis pseudogap, which does not change either with H or with T. Strikingly different H dependencies, together with previously observed different temperature dependencies of the two gaps, speak against a superconducting origin of the pseudogap.