Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)
O 41.31: Poster
Dienstag, 23. März 2010, 18:30–21:00, Poster B1
Temperature dependent angle resolved photo-emission spectroscopy of quasi one-dimensional organic conductor tetrathiofulvalene tetracyanoquinodimethane (TTF-TCNQ) thin films — •Martin Laux1, Indranil Sarkar1, Julia Demokritova1, Jia Wei1, Andreas Ruffing1, Vita Solovyeva2, Milan Rudloff2, Michael Huth2, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Germany — 2Physikalisches Institut, J. W. Goethe-Universität, Frankfurt am Main, Germany
The organic conductor TTF-TCNQ is known to form a classic quasi-one-dimensional metal that possibly can be used to test non-Fermi-liquid behavior in 1D Hubbard model systems [1]. Here we report on temperature dependent angle resolved photo-emission spectroscopy (ARPES) on TTF-TCNQ films deposited on KCl(100) substrate. The ARPES spectrum exhibits transfer of spectral weight near Fermi energy over a wide energy range of ∼ 0.2 eV, comparable to bandwidth, for temperatures 80 K < T < 300 K. Such a large spectral weight transfer compared to the thermal energy kBT, indicates non-Fermi liquid behavior that cannot be explained by electron-phonon coupling and suggests the formation of 1D Hubbard model [2].
[1] N. Bulut et. al., Phys. Rev. B 74, 113106 (2006)
[2] R. Claessen et. al., Phys. Rev. Lett. 88, 096402 (2002)