2000/07/31 by J. J. Lin, Juhn‐Jong Lin, L. Y. Kao · 3 citations
Chemistry · Mathematics · Physics and Astronomy · #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Crystallite #Crystallography #Dephasing #Electron #Materials science #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Saturation (graph theory) #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.mes-hall
paper · pdf · doi:10.1088/0953-8984/13/5/102
published as J. Phys.: Condens. Matter 13, L119 (2001) · 4 pages, 3 eps figures
arxiv created 2000/07/31 · openalex publication_date 2001/01/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have systematically investigated the low-temperature electron dephasing times τ ϕ in more than 40 three-dimensional polycrystalline impure metals with distinct material characteristics. In all cases, a saturation of the dephasing time is observed below about a (few) degree(s) Kelvin, depending on samples. The value of the saturated dephasing time τ 0 [≡τ ϕ ( T →0 K)] falls basically in the range 0.005 to 0.5 ns for all samples. Particularly, we find that τ 0 scales with the electron diffusion constant D as τ 0 ~ D -α , with α close to or slightly larger than 1, for over two decades of D from about 0.1 to 10 cm 2 s -1 . Our observation implies an essentially constant saturated dephasing length of ( D τ 0 ) 1/2 ~ 1000 Å in three-dimensional polycrystalline disordered metals. A complete theoretical explanation is not yet available.