Charge Excitations in Two-Leg Ladders: A tDMRG Approach

We study the dynamics of holon–doublon pairs in two-leg Hubbard ladders with the time-dependent Density Matrix Renormalization-Group approach. Benchmark results show that the Krylov algorithm is well suited to calculate the time dependence of observables in these systems. Furthermore, we show that t...

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Bibliographic Details
Published in:	Journal of superconductivity and novel magnetism 2013-06, Vol.26 (6), p.2193-2196
Main Authors:	Dias da Silva, Luis G. G. V., Alvarez, G., Summers, M. S., Dagotto, E.
Format:	Article
Language:	eng
Subjects:	Asymmetry Characterization and Evaluation of Materials Charge Condensed Matter Physics Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Density Dynamic tests Dynamics Electron states Exact sciences and technology Excitation Ladders Magnetic Materials Magnetism Materials science Nanoscale materials and structures: fabrication and characterization Original Paper Other topics in nanoscale materials and structures Physics Physics and Astronomy Strongly Correlated Systems Superconductivity Theories and models of many electron systems
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Summary:	We study the dynamics of holon–doublon pairs in two-leg Hubbard ladders with the time-dependent Density Matrix Renormalization-Group approach. Benchmark results show that the Krylov algorithm is well suited to calculate the time dependence of observables in these systems. Furthermore, we show that the dynamics of the holon–doublon depend strongly on the coupling asymmetry within the ladder, indicating that the ladder geometry plays a role in the decay of these elementary charge excitations.
ISSN:	1557-1939 1557-1947