| Autor: |
Siegel, David A., Cheol-Hwan Park, Choongyu Hwang, Deslippe, Jack, Fedorov, Alexei V., Louie, Steven G., Lanzara, Alessandra |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 7/12/2011, Vol. 108 Issue 28, p11365-11369, 5p |
| Abstrakt: |
The Landau-Fermi liquid picture for quasiparticles assumes that charge carriers are dressed by many-body interactions, forming one of the fundamental theories of solids. Whether this picture still holds for a semimetal such as graphene at the neutrality point, i.e., when the chemical potential coincides with the Dirac point energy, is one of the long-standing puzzles in this field. Here we present such a study in quasi-freestanding graphene by using high-resolution angle-resolved photoemission spectroscopy. We see the electron-electron and electron-phonon interactions go through substantial changes when the semimetallic regime is approached, including renormalizations due to strong electron-electron interactions with similarities to marginal Fermi liquid behavior. These findings set a new benchmark in our understanding of many-body physics in graphene and a variety of novel materials with Dirac fermions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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