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On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2

2019-09-27 Technology & Engineering
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Release : 2019-09-27
Genre : Technology & Engineering
Kind : eBook
Book Rating : 256/5 ( reviews)

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Book Synopsis On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2 by : Chuan Chen

Download or read book On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2 written by Chuan Chen. This book was released on 2019-09-27. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents analytical theoretical studies on the interplay between charge density waves (CDW) and superconductivity (SC) in the actively studied transition-metal dichalcogenide 1T-TiSe2. It begins by reapproaching a years-long debate over the nature of the phase transition to the commensurate CDW (CCDW) state and the role played by the intrinsic tendency towards excitonic condensation in this system. A Ginzburg-Landau phenomenological theory was subsequently developed to understand the experimentally observed transition from commensurate to incommensurate CDW (ICDW) order with doping or pressure, and the emergence of a superconducting dome that coexists with ICDW. Finally, to characterize microscopically the effects of the interplay between CDW and SC, the spectrum of CDW fluctuations beyond mean-field was studied in detail. In the aggregate, the work reported here provides an encompassing understanding of what are possibly key microscopic underpinnings of the CDW and SC physics in TiSe2.

On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2

2019 Charge density waves
Download On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2 PDF Online Free

Author :
Release : 2019
Genre : Charge density waves
Kind : eBook
Book Rating : 265/5 ( reviews)

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Book Synopsis On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2 by : Chuan Chen

Download or read book On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe2 written by Chuan Chen. This book was released on 2019. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents analytical theoretical studies on the interplay between charge density waves (CDW) and superconductivity (SC) in the actively studied transition-metal dichalcogenide 1T-TiSe2. It begins by reapproaching a years-long debate over the nature of the phase transition to the commensurate CDW (CCDW) state and the role played by the intrinsic tendency towards excitonic condensation in this system. A Ginzburg-Landau phenomenological theory was subsequently developed to understand the experimentally observed transition from commensurate to incommensurate CDW (ICDW) order with doping or pressure, and the emergence of a superconducting dome that coexists with ICDW. Finally, to characterize microscopically the effects of the interplay between CDW and SC, the spectrum of CDW fluctuations beyond mean-field was studied in detail. In the aggregate, the work reported here provides an encompassing understanding of what are possibly key microscopic underpinnings of the CDW and SC physics in TiSe2.

Interplay of Superconductivity, Magnetism, and Density Waves in Rare-earth Tritellurides and Iron-based Superconducting Materials

2011
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Release : 2011
Genre :
Kind : eBook
Book Rating : 115/5 ( reviews)

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Book Synopsis Interplay of Superconductivity, Magnetism, and Density Waves in Rare-earth Tritellurides and Iron-based Superconducting Materials by : Diego Andrés Zocco

Download or read book Interplay of Superconductivity, Magnetism, and Density Waves in Rare-earth Tritellurides and Iron-based Superconducting Materials written by Diego Andrés Zocco. This book was released on 2011. Available in PDF, EPUB and Kindle. Book excerpt: Superconductivity, charge- and spin-density waves are collective electronic phenomena that originate from electron-electron and electron-phonon interactions, and the concept of Fermi surface competition between these collective states is one of the most fundamental problems of condensed matter physics. High pressures provide a clean method to tune the electronic properties that determine the superconducting, magnetic or charge-ordered ground states of complex materials. The charge-density wave, magnetic and superconducting ordered states of the rare-earth tritellurides system, and the interplay between the spin-density wave, localized magnetism and superconductivity in the recently discovered Fe-based high-temperature superconductors, have been investigated under extreme conditions of pressure, magnetic field and low temperatures.

Density Waves In Solids

2018-03-08 Science
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Release : 2018-03-08
Genre : Science
Kind : eBook
Book Rating : 562/5 ( reviews)

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Book Synopsis Density Waves In Solids by : George Gruner

Download or read book Density Waves In Solids written by George Gruner. This book was released on 2018-03-08. Available in PDF, EPUB and Kindle. Book excerpt: ?Density Waves in Solids is written for graduate students and scientists interested in solid-state sciences. It discusses the theoretical and experimental state of affairs of two novel types of broken symmetry ground states of metals, charge, and spin density waves. These states arise as the consequence of electron-phonon and electron-electron interactions in low-dimensional metals.Some fundamental aspects of the one-dimensional electron gas, and of the materials with anisotropic properties, are discussed first. This is followed by the mean field theory of the phases transitions?discussed using second quantized formalism?together with the various experimental observations on the transition and on the ground states. Fluctuation effects and the collective excitations are reviewed next, using the Ginzburg-Landau formalism, followed by the review of the interaction of these states with the underlying lattice and with impurities. The final chapters are devoted to the response of the ground states to external perturbations.

Emergent States in Photoinduced Charge-Density-Wave Transitions

2021-09-17 Science
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Release : 2021-09-17
Genre : Science
Kind : eBook
Book Rating : 512/5 ( reviews)

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Book Synopsis Emergent States in Photoinduced Charge-Density-Wave Transitions by : Alfred Zong

Download or read book Emergent States in Photoinduced Charge-Density-Wave Transitions written by Alfred Zong. This book was released on 2021-09-17. Available in PDF, EPUB and Kindle. Book excerpt: This book advances understanding of light-induced phase transitions and nonequilibrium orders that occur in a broken-symmetry system. Upon excitation with an intense laser pulse, materials can undergo a nonthermal transition through pathways different from those in equilibrium. The mechanism underlying these photoinduced phase transitions has long been researched, but many details in this ultrafast, non-adiabatic regime still remain to be clarified. The work in this book reveals new insights into this phenomena via investigation of photoinduced melting and recovery of charge density waves (CDWs). Using several time-resolved diffraction and spectroscopic techniques, the author shows that the light-induced melting of a CDW is characterized by dynamical slowing-down, while the restoration of the symmetry-breaking order features two distinct timescales: A fast recovery of the CDW amplitude is followed by a slower re-establishment of phase coherence, the latter of which is dictated by the presence of topological defects in the CDW. Furthermore, after the suppression of the original CDW by photoexcitation, a different, competing CDW transiently emerges, illustrating how a hidden order in equilibrium can be unleashed by a laser pulse. These insights into CDW systems may be carried over to other broken-symmetry states, such as superconductivity and magnetic ordering, bringing us one step closer towards manipulating phases of matter using a laser pulse.

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