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Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy

2021-12-08 Technology & Engineering
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Release : 2021-12-08
Genre : Technology & Engineering
Kind : eBook
Book Rating : 324/5 ( reviews)

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Book Synopsis Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy by : Hsiang-Hsi Kung

Download or read book Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy written by Hsiang-Hsi Kung. This book was released on 2021-12-08. Available in PDF, EPUB and Kindle. Book excerpt: This thesis contains three breakthrough results in condensed matter physics. Firstly, broken reflection symmetry in the hidden-order phase of the heavy-fermion material URu2Si2 is observed for the first time. This represents a significant advance in the understanding of this enigmatic material which has long intrigued the condensed matter community due to its emergent long range order exhibited at low temperatures (the so-called “hidden order”). Secondly and thirdly, a novel collective mode (the chiral spin wave) and a novel composite particle (the chiral exciton) are discovered in the three dimensional topological insulator Bi2Se3. This opens up new avenues of possibility for the use of topological insulators in photonic, optoelectronic, and spintronic devices. These discoveries are facilitated by using low-temperature polarized Raman spectroscopy as a tool for identifying optically excited collective modes in strongly correlated electron systems and three-dimensional topological insulators.

Spontaneous Transient Ultrafast Coherent Raman Spectroscopy

2016
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Release : 2016
Genre :
Kind : eBook
Book Rating : 819/5 ( reviews)

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Book Synopsis Spontaneous Transient Ultrafast Coherent Raman Spectroscopy by : Seth Meiselman

Download or read book Spontaneous Transient Ultrafast Coherent Raman Spectroscopy written by Seth Meiselman. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: I explore the application of Transient Coherent Ultrafast Phonon Spectroscopy (TCUPS) to the measurement of vibrational coherence dynamics of liquid alcohols. The demonstrated technique is complementary to and, in some cases, simpler than traditional stimulated spectroscopy techniques in that it does not require more than one laser and is free of non-resonant background. I demonstrate coherence measurements of single-photon-level collective excitations: a single vibrational state at 1033 (1/cm) in; a pair of simultaneous excited vibrational states at 2834 and 2944 (1/cm) in methanol; and three simultaneous excited states at 2885, ∼2930, and 2976 (1/cm) in isopropanol. I develop a Fourier-transform-based analysis of the TCUPS data that overcomes poor signal-to-noise ratio and signal degradation due to etaloning and fluorescence. The coherence lifetimes and oscillation frequencies agree with frequency-domain line-shape measurements and femtosecond Coherent anti-Stokes Raman Scattering (CARS) measurements.

Remote Compositional Analysis

2019-11-28 Language Arts & Disciplines
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Release : 2019-11-28
Genre : Language Arts & Disciplines
Kind : eBook
Book Rating : 20X/5 ( reviews)

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Book Synopsis Remote Compositional Analysis by : Janice L. Bishop

Download or read book Remote Compositional Analysis written by Janice L. Bishop. This book was released on 2019-11-28. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive overview of the spectroscopic, mineralogical, and geochemical techniques used in planetary remote sensing.

Energy Research Abstracts

1989 Power resources
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Release : 1989
Genre : Power resources
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by . This book was released on 1989. Available in PDF, EPUB and Kindle. Book excerpt:

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.

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