Direct observation of a Fermi surface and superconducting gap in LuNi2B2C

dc.contributor.author Starowicz, P.
dc.contributor.author Liu, C.
dc.contributor.author Khasanov, R.
dc.contributor.author Kondo, Takeshi
dc.contributor.author Samolyuk, G. D.
dc.contributor.author Gardenghi, D.
dc.contributor.author Lee, Y.
dc.contributor.author Ohta, T.
dc.contributor.author Harmon, B. N.
dc.contributor.author Canfield, Paul
dc.contributor.author Bud'ko, Sergey L.
dc.contributor.author Rotenberg, E.
dc.contributor.author Kaminski, Adam
dc.contributor.department Physics and Astronomy
dc.date.accessioned 2022-07-27T22:58:41Z
dc.date.available 2022-07-27T22:58:41Z
dc.date.issued 2008-04-01
dc.description.abstract We measured the Fermi surface (FS), band dispersion, and superconducting gap in LuNi2B2C using angle resolved photoemission spectroscopy. Experimental data were compared to the tight-binding version of the linear muffin-tin orbital (LMTO) method and linearized augmented plane-wave (LAPW) calculations. We found reasonable agreement between the two calculations and experimental data. The measured FS exhibits large parallel regions with a nesting vector that agrees with a previous positron annihilation study and calculations of the generalized susceptibility. The measured dispersion curves also agree reasonably well with the TB-LMTO calculations, although with some differences in the strength of the hybridization. In addition, the spectrum in the superconducting state revealed a 2 meV superconducting gap. The data also clearly show the presence of a coherent peak above the chemical potential mu, which originates from thermally excited electrons above the energy of 2 Delta. This feature was not previously observed in the Lu-based material.
dc.description.comments This article is published as Starowicz, P., C. Liu, R. Khasanov, T. Kondo, G. Samolyuk, D. Gardenghi, Y. Lee et al. "Direct observation of a Fermi surface and superconducting gap in LuNi 2 B 2 C." Physical Review B 77, no. 13 (2008): 134520. DOI: 10.1103/PhysRevB.77.134520. Copyright 2008 American Physical Society. Posted with permission.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/Qr9mdB5r
dc.language.iso en
dc.publisher American Physical Society
dc.source.uri https://doi.org/10.1103/PhysRevB.77.134520 *
dc.title Direct observation of a Fermi surface and superconducting gap in LuNi2B2C
dc.type Article
dspace.entity.type Publication
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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