1997/10/31 by Revaz Ramazashvili, R. R. Ramazashvili, Piers Coleman +1
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat
paper · pdf · doi:10.1103/physrevlett.79.3752
published as Phys. Rev. Lett., Vol.79, 3752 (1997) · 3 pages, 3 Postscript figures, Latex
arxiv created 1997/11/01 · openalex publication_date 1997/11/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the properties of a quantum critical point which develops in a BCS superconductor when pair breaking suppresses the transition temperature to zero. The pair fluctuations are characterized by a dynamical critical exponent z\phantom\rule0ex0ex=\phantom\rule0ex0ex2. Except for very low temperatures, anomalous contribution to the conductivity is proportional to √(T) in three dimensions, but to 1/T in two dimensions. At lowest temperatures, the conductivity correction varies as T1/4 in three dimensions, and as ln(1/T) in two.