Charge Friedel oscillations in a Mott insulator
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Mross-2011-Charge Friedel oscillations in a Mott insulator.pdf
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Author(s)
Mross, David Fabian
Todadri, Senthil
Date Issued
July 2011
Journal
Physical Review B
Publisher
American Physical Society
Citation
Mross, David, and T. Senthil. “Charge Friedel oscillations in a Mott insulator.” Physical Review B 84 (2011): n. pag. Web. 18 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
When a metal undergoes a transition to an insulator it will lose its electronic Fermi surface. Interestingly, in some situations a “ghost” Fermi surface of electrically neutral spin carrying fermions may survive into the insulator. Such a novel ghost Fermi surface has been proposed to underlie the properties of a few different materials but its direct detection has proven elusive. In this paper, we show that the ghost Fermi surface leads to slowly decaying spatial oscillations of the electron density near impurities or other defects. These and related oscillations stem from the sharpness of the ghost Fermi surface and are direct analogs of the familiar Friedel oscillations in metals. The oscillation period contains geometric information about the shape of the ghost Fermi surface, which can be potentially exploited to detect its existence.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.84.041102
