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Exotic Quantum Phases in Two-dimensional Frustrated Magnets

2007
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Release : 2007
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Book Rating : 729/5 ( reviews)

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Book Synopsis Exotic Quantum Phases in Two-dimensional Frustrated Magnets by : Jason Alicea

Download or read book Exotic Quantum Phases in Two-dimensional Frustrated Magnets written by Jason Alicea. This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt: Quite remarkably, the low-energy behavior of most metals is well captured by effectively ignoring the Coulomb repulsion between the constituent electrons. Yet over the past several decades many examples of "strongly correlated systems" have been discovered for which a strong interplay between interactions and quantum mechanics leads rather to spectacular deviations from an independent-electron picture, as exemplified by quantum Hall systems, high-Tc superconductors, heavy fermion compounds, etc. This thesis is concerned with exploring exotic physics that can emerge in a class of correlated systems known as quantum magnets, where electrons "self-localize" around crystal lattice sites due to interactions, leaving residual spin couplings at low energies. Typically the ground states of such systems exhibit spontaneous symmetry breaking, commonly in the form of magnetic order. But sufficiently strong quantum fluctuations can suppress symmetry-breaking order even down to zero temperature, generating exotic "spin liquid" phases that exhibit novel features such as electron fractionalization, topological order, emergent symmetries, etc.

Exotic Phases in Geometrically Frustrated Quantum Magnets

2013 Physics theses
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Release : 2013
Genre : Physics theses
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Exotic Phases in Geometrically Frustrated Quantum Magnets by : Tyler Dodds

Download or read book Exotic Phases in Geometrically Frustrated Quantum Magnets written by Tyler Dodds. This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt:

Three-dimensional Frustrated Quantum Magnets

2012
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Release : 2012
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Book Rating : 100/5 ( reviews)

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Book Synopsis Three-dimensional Frustrated Quantum Magnets by : SungBin Lee

Download or read book Three-dimensional Frustrated Quantum Magnets written by SungBin Lee. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: Frustration, induced by competition between different interactions, can be realized on a diamond lattice, especially in A-site of spinel materials with a chemical formula AB2X4. We address the realization of classical spin liquid and provide a unified theoretical explanation of various phenomena observed in spinel materials. Motivated by CoNb2O6, we study interplay between quantum criticality and geometric frustration. In the presence of carefully oriented magnetic field, the system realizes quantum phase transition of transverse field quantum Ising model while magnetic frustration exists due to the lattice geometry at the same time. We reveal several quantum magnetic phases and crossovers between one dimensional quantum criticality and several three dimensional quantum critical points. Lastly, we look for the possible realization of a quantum spin liquid focusing on A-site magnets in rare-earth pyrochlores. Based on a pseudospin-1/2 Hamiltonian, we discuss how quantum fluctuations lead the exotic phases such as a U(1) quantum spin liquid and XY ordered phases, beyond classical spin ice state.

Introduction to Frustrated Magnetism

2011-01-12 Science
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Release : 2011-01-12
Genre : Science
Kind : eBook
Book Rating : 890/5 ( reviews)

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Book Synopsis Introduction to Frustrated Magnetism by : Claudine Lacroix

Download or read book Introduction to Frustrated Magnetism written by Claudine Lacroix. This book was released on 2011-01-12. Available in PDF, EPUB and Kindle. Book excerpt: The field of highly frustrated magnetism has developed considerably and expanded over the last 15 years. Issuing from canonical geometric frustration of interactions, it now extends over other aspects with many degrees of freedom such as magneto-elastic couplings, orbital degrees of freedom, dilution effects, and electron doping. Its is thus shown here that the concept of frustration impacts on many other fields in physics than magnetism. This book represents a state-of-the-art review aimed at a broad audience with tutorial chapters and more topical ones, encompassing solid-state chemistry, experimental and theoretical physics.

High Magnetic Fields

2008-01-11 Science
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Release : 2008-01-11
Genre : Science
Kind : eBook
Book Rating : 49X/5 ( reviews)

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Book Synopsis High Magnetic Fields by : Claude Berthier

Download or read book High Magnetic Fields written by Claude Berthier. This book was released on 2008-01-11. Available in PDF, EPUB and Kindle. Book excerpt: This book is addressed to all scientists interested in the use of high magnetic ?elds and in the use of high-?eld facilities around the world. In particular it will help young scientists and newcomers to the topic to gain a better understanding in areas such as condensed matter physics, in which the magnetic ?eld plays a key role either as a parameter controlling the Hamiltonian, or as an experimental tool to probe the underlying mechanism. This concerns mostly strongly correlated and (or) low dimensional systems. Rather than covering all these subjects in detail, the philosophy here is to give essential physical concepts in some of the most active ?elds, which have been quickly growing in the last ten to twenty years. Besides its role as a physical parameter in condensed matter physics, a large magnetic ?eld is essential to Electron Paramagentic Resonance (EPR) and Nuclear Magnetic Resonance (NMR) spectroscopies. The state of art of high resolution NMRin liquids and solids and high frequency EPRapplied to ?elds like chemistry and biology are also reviewed in this volume. The ?rst series of chapters is devoted to the integer and the Fractional Qu- tum Hall E?ects (FQHE) in two-dimensional electron systems. C. Glattli brushes an historical background and a comprehensive review of transport phenomena in these systems, including recent developments on the mesoscopic electronic transport at the edges of quantum Hall samples, chiral Luttinger liquids and fractional excitations. R.

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