Imperfect nesting and Peierls instability for a two-dimensional tight-binding model
نویسندگان
چکیده
منابع مشابه
Nesting and Instability in a Two-Dimensional System
Different from one-dimensional systems, nesting in two-dimensional (2D) systems is not perfect but some 2D systems still have Peierls instability and hidden nesting. This paper shows that the nextnearest neighbor (NNN) hopping which controls the nesting deviation, heavily suppresses the Peierls instability. There is a critical value for the NNN hopping, beyond which the Peierls instability is d...
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Common models describing magnetotransport properties of periodically modulated two–dimensional systems often either directly start from a semiclassical approach or give results well conceivable within the semiclassical framework. Recently, magnetoresistance oscillations have been found on samples with strong unilateral modulation and short period (d = 15 nm) which cannot be explained on a semic...
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Luis A. Agapito,1,2 Marco Fornari,3,4 Davide Ceresoli,5 Andrea Ferretti,6 Stefano Curtarolo,4,7 and Marco Buongiorno Nardelli2,4,* 1Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA 2Department of Physics, University of North Texas, Denton, Texas 76203, USA 3Department of Physics, Central Michigan University, Mount Pleasant, Michigan ...
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In this work calculation of energetics of transition metal surfaces is presented. The tight-binding model is employed in order to calculate the energetics. The tight-binding basis set is limited to d orbitals which are valid for elements at the end of transition metals series. In our analysis we concentrated on electronic effects at temperature T=0 K, this means that no entropic term will be pr...
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We consider the static Holstein model, describing a chain of Fermions interacting with a classical phonon eld, when the interaction is weak and the density is a rational number = P=Q, with P; Q relative prime integers. We show that the energy of the system, as a function of the phonon eld, has one (if Q is even) or two (if Q is odd) stationary points, deened up to a lattice translation, which a...
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ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2001
ISSN: 1434-6028
DOI: 10.1007/pl00011133