Project Details
Projekt
Embedded one-dimensional electron-phonon systems
Applicant
Professor Dr. Eric Jeckelmann
Subject Area
Experimental Condensed Matter Physics
Term
from 2012 to 2017
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 194370842
The purpose of this project is to extend our theoretical understanding of atomic wires on substrates using effective models for the low-energy degrees of freedom. The first goal is to determine under which general conditions one-dimensional physics can be found in such systems. The second goal is to identify the signature of quasi-one-dimensional physics in these systems to facilitate the interpretation of experiments and first-principles simulations performed in this Research Unit. For this purpose we will combine a variety of well-established methods such as Ginzburg-Landau theory for charge and spin density waves, stochastic and density-matrix renormalization group simulations of quantum lattice models, bosonization, and density functional theory. During the first funding period we have considered the problem of quasi-one-dimensional long-range order mediated by substrates, the Peierls transition with applications to indium wires on Si(111) surfaces, and the modelization of correlated wires on substrates with a view to plasmon excitations in metallic wires and the possible realization of Luttinger liquids in Au/Ge(100). In the second period we will extend this project to the study of charge localization and possible intrinsic antiferromagnetism at silicon step edges, e.g. in Au/Si(553). In addition, we will investigate the interplay of electron-electron interaction and spin-orbit coupling in strongly anisotropic two-dimensional systems with a view to Pb chains on Si(557) surfaces.
DFG Programme
Research Units
