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Fermi-Edge Singularities in the Mesoscopic X-Ray Edge Problem

Hentschel, Martina, Ullmo, Denis and Baranger, Harold U. (2005) Fermi-Edge Singularities in the Mesoscopic X-Ray Edge Problem. Phys. Rev. Lett. 93 (17, 4), p. 176807.

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We study the x-ray edge problem for a chaotic quantum dot or nanoparticle displaying mesoscopic fluctuations. In the bulk, x-ray physics is known to produce Fermi-edge singularities—deviations from the naively expected photoabsorption cross section in the form of a peaked or rounded edge. For a coherent system with chaotic dynamics, we find substantial changes; in particular, a photoabsorption ...


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Item type:Article
Date:22 October 2005
Institutions:Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni
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Keywords:XANES, Fermi level, quantum dots, nanoparticles, chaos, fluctuations, two-dimensional electron gas
Dewey Decimal Classification:500 Science > 530 Physics
Created at the University of Regensburg:Unknown
Item ID:9463
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