Superconducting Density of States from the Magnetic Penetration Depth of Electron-Doped Cuprates 2-xx4-yLaCeCuO and 2-xx4-yPrCeCuO

John A. Skinta, Mun-Seog Kim, Thomas R. Lemberger, Tine Greibe, M. Naito

Research output: Contribution to journalConference articleResearchpeer-review

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 languageEnglish
JournalJournal of Low Temperature Physics
Volume131
Issue number3-4
Pages (from-to)359-368
ISSN0022-2291
DOIs
Publication statusPublished - 2001
Externally publishedYes
EventInternational Conference on Physics and Chemistry of Molecular and Oxide Superconductors (MOS2002) - Hsinchu, Taiwan, Province of China
Duration: 13 Aug 200218 Aug 2002

Conference

ConferenceInternational Conference on Physics and Chemistry of Molecular and Oxide Superconductors (MOS2002)
CountryTaiwan, Province of China
CityHsinchu
Period13/08/200218/08/2002

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