Overview
- Nominated as an outstanding Ph.D. thesis by the École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
- Presents new theoretical framework explaining anomaly in neutron scattering from square lattice antiferromagnet
- Derives effective low-energy theory to describe magnetic excitation spectra of a range of cuprate materials
Part of the book series: Springer Theses (Springer Theses)
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Table of contents (2 chapters)
Keywords
About this book
This thesis presents a qualitative advance in our understanding of quantum effects in layered magnetic materials. The nearest neighbor Heisenberg ferromagnetic ranks among the oldest and most fundamental models of quantum many body effects. It has long been established that in one dimension quantum fluctuations lead to a quantum disordered ground state with fractional excitations called spinons." In two dimensions, the ground state of the Heisenberg model displays static order and to first approximation the dynamics can be described as semi-classical spin waves. Through theoretical advances the author demonstrates that at high energy around particular points in reciprocal space these semi-classical spin-waves deconfine into fractional excitations akin to the one-dimensional spinons. He thereby provides the first explanation of a long-standing experimental observation.
In the second half of his thesis Bastien Dalla Piazza develops a unified description of the magnetic excitation spectra of a range of cuprate parent compounds to the high temperature superconductors.
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About the author
Bibliographic Information
Book Title: Excitation Spectra of Square Lattice Antiferromagnets
Book Subtitle: Theoretical Explanation of Experimental Observations
Authors: Bastien Dalla Piazza
Series Title: Springer Theses
DOI: https://doi.org/10.1007/978-3-319-26419-6
Publisher: Springer Cham
eBook Packages: Physics and Astronomy, Physics and Astronomy (R0)
Copyright Information: Springer International Publishing Switzerland 2016
Hardcover ISBN: 978-3-319-26418-9Published: 08 February 2016
Softcover ISBN: 978-3-319-79951-3Published: 30 March 2018
eBook ISBN: 978-3-319-26419-6Published: 06 January 2016
Series ISSN: 2190-5053
Series E-ISSN: 2190-5061
Edition Number: 1
Number of Pages: XVII, 176
Number of Illustrations: 14 b/w illustrations, 57 illustrations in colour
Topics: Magnetism, Magnetic Materials, Quantum Information Technology, Spintronics, Quantum Physics, Optical and Electronic Materials