2005/07/31 by F. Rullier-Albenque, R. Tourbot, H. Alloul +4
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Doping #Electrical resistivity and conductivity #Electrode #Magnetic and transport properties of perovskites and related materials #Materials science #Nernst effect #Nernst equation #Phase (matter) #Phase coherence #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.96.067002
revised version. to be published in Physical Review Letters
arxiv created 2006/01/06 · openalex publication_date 2006/02/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have studied the influence of disorder induced by electron irradiation on the Nernst effect in optimally and underdoped YBa2Cu3O(7-delta) single crystals. The fluctuation regime above T(c) expands significantly with disorder, indicating that the T(c) decrease is partly due to the induced loss of phase coherence. In pure crystals the temperature extension of the Nernst signal is found to be narrow whatever the hole doping, contrary to data reported in the low-T(c) cuprate families. Our results show that the presence of intrinsic disorder can explain the enhanced range of the Nernst signal found in the pseudogap phase of the latter compounds.