Show simple item record

dc.contributorVirginia Techen
dc.contributor.authorGao, C.en
dc.contributor.authorRitter, Alfred L.en
dc.contributor.authorDennison, John Roberten
dc.contributor.authorHolzwarth, N. A. W.en
dc.date.accessioned2014-05-07T15:37:06Zen
dc.date.available2014-05-07T15:37:06Zen
dc.date.issued1988-03en
dc.identifier.citationGao, C.; Ritter, A. L.; Dennison, J. R.; Holzwarth, N. A. W., "Spectral momentum density of graphite from (e,2e) spectroscopy: Comparison with first-principles calculation," Phys. Rev. B 37, 3914 DOI: http://dx.doi.org/10.1103/PhysRevB.37.3914en
dc.identifier.issn0163-1829en
dc.identifier.urihttp://hdl.handle.net/10919/47890en
dc.description.abstractWe have measured the spectral momentum density ρ(E,q) of graphite by (e,2e) spectroscopy for momentum parallel and perpendicular to the crystal c axis. In the independent-electron approximation, ρ(E,q)=ΣG‖Uk(G)‖2 δ(q-k-G)δ(E-E(k)) where the one-electron wave function is Ψk(r)=eik⋅rΣGUk(G)eiG⋅r) and G is a reciprocal-lattice vector. The measurements covered a range of momentum parallel to the c axis equal to 0≤‖q‖≤1.84 Å-1 and a range of momentum perpendicular to the c axis equal to 0≤‖q‖≤2.35 Å-1. The energy range spanned the valence band of graphite from 4.4 eV above the Fermi energy to 27.6 eV below the Fermi energy. The momentum resolution was 0.47 and 0.73 Å-1 (full width at half maximum) for momentum parallel and perpendicular to the c axis, respectively. The energy resolution was 8.6 eV. The maximum coincidence rate was ∼0.02 counts/sec. The band structure E(k) and spectral density ‖Uk(G)‖2 have been calculated from first principles using a self-consistent density-functional theory in the local-density approximation with a mixed-basis pseudopotential technique. The agreement within experimental uncertainties between measurement and theory is excellent.en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectphysics, condensed matteren
dc.titleSpectral momentum density of graphite from (e,2e) spectroscopy: Comparison with first-principles calculationen
dc.typeArticle - Refereeden
dc.contributor.departmentPhysicsen
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.37.3914en
dc.date.accessed2014-04-23en
dc.title.serialPhysical Review Ben
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.37.3914en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record