Bouillot Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field

1. Auflage 2012
ISBN: 978-3-642-33808-3
Verlag: Springer
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 98 Seiten

Reihe: Physics and Astronomy

This thesis shows how a combination of analytic and numerical techniques, such as a time dependent and finite temperature Density Matrix Renormalization Group (DMRG) technique, can be used to obtain the physical properties of low dimensional quantum magnets with an unprecedented level of accuracy. A comparison between the theory and experiment then enables these systems to be used as quantum simulators; for example, to test various generic properties of low dimensional systems such as Luttinger liquid physics, the paradigm of one dimensional interacting quantum systems. Application of these techniques to a material made of weakly coupled ladders (BPCB) allowed the first quantitative test of Luttinger liquids. In addition, other physical quantities (magnetization, specific heat etc.), and more remarkably the spins-spin correlations – directly measurable in neutron scattering experiments – were in excellent agreement with the observed quantities. We thus now have tools to quantitatiivelyassess the dynamics for this class of quantum systems.

Zielgruppe

Research

Autoren/Hrsg.

Bouillot, Pierre

Inhaltsverzeichnis

Introduction.- Spin-1/2 ladders.- Methods.- Static properties and NMR relaxation rate.- Dynamical correlations of a spin ladder.- Conclusions and perspectives.

Über Autor(innen)

Dr. Pierre Bouillot
University of Geneva
DPMC-MaNEP
1211 Geneva
Switzerland
e-mail: [e-mail]
affiliation: University of Geneva, Switzerland