Abstract
From measurements of the magnetic penetration depth, lambda(T), from 1.6 K to T-c in films of electron-doped cuprates La2-xCexCuO4-y and Pr2-xCexCuO4-y we obtain the normalized density of states, N-s(E) at T=0 by using a simple model. In this framework, the flat behavior of lambda(-2)(T) at low T implies N-s(E) is small, possibly gapped, at low energies. The upward curvature in lambda(-2)(T) near T-c seen in overdoped films implies that superfluid comes from an anomalously small energy band within about 3k(B)T(c) of the Fermi surface.
Original language | English |
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Journal | Journal of Low Temperature Physics |
Volume | 131 |
Issue number | 3-4 |
Pages (from-to) | 359-368 |
ISSN | 0022-2291 |
DOIs | |
Publication status | Published - 2001 |
Externally published | Yes |
Event | International Conference on Physics and Chemistry of Molecular and Oxide Superconductors - Hsinchu, Taiwan, Province of China Duration: 13 Aug 2002 → 18 Aug 2002 |
Conference
Conference | International Conference on Physics and Chemistry of Molecular and Oxide Superconductors |
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Country/Territory | Taiwan, Province of China |
City | Hsinchu |
Period | 13/08/2002 → 18/08/2002 |