1# Library to Find Best eBook for Read
Author :
Release : 2015
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Charge-density-wave and Pair-density-wave Orders in Underdoped Cuprates by :
Download or read book Charge-density-wave and Pair-density-wave Orders in Underdoped Cuprates written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen Edkins
Release : 2017-08-31
Genre : Technology & Engineering
Kind : eBook
Book Rating : 758/5 ( reviews)
Book Synopsis Visualising the Charge and Cooper-Pair Density Waves in Cuprates by : Stephen Edkins
Download or read book Visualising the Charge and Cooper-Pair Density Waves in Cuprates written by Stephen Edkins. This book was released on 2017-08-31. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on the use of scanning tunnelling microscopy to elucidate the atomic-scale electronic structure of a charge density wave, revealing that it has a d-symmetry form factor, hitherto unobserved in nature. It then details the development of an entirely new class of scanned probe: the scanning Josephson tunnelling microscope. This scans the Josephson junction formed between a cuprate superconducting microscope tip and the surface of a cuprate sample, thereby imaging the superfluid density of the sample with nanometer resolution. This novel method is used to establish the existence of a spatially modulated superconducting condensate, something postulated theoretically over half a century ago but never previously observed.
Author : Chuan Chen
Release : 2019-09-27
Genre : Technology & Engineering
Kind : eBook
Book Rating : 256/5 ( reviews)
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.
Author : Zhehao Dai (Ph. D.)
Release : 2020
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Exploring Strongly Interacting Gapless States by : Zhehao Dai (Ph. D.)
Download or read book Exploring Strongly Interacting Gapless States written by Zhehao Dai (Ph. D.). This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: We study the physical property of pair density wave (PDW) and fluctuating PDW, and use it to build an effective theory of the strongly interacting pseudogap phase in cuprate high temperature superconductors. In Chapter 2, we study how Fulde-Ferrell state, the simplest form of PDW, responds to incident light. The collective motion of the condensate plays a key role; gauge invariance guides us to the correct result. From Chapter 3 to Chapter 7, we construct a pseudogap metallic state by considering quantum fluctuating PDW. We analyze a recent scanning tunneling microscope (STM) discovery of period-8 density waves in the vortex halo of the d-wave superconductor. We put it in the context of the broader pseudogap phenomenology, and compare the experimental results with various PDW-driven models and a charge density wave (CDW) driven model. We propose experiments to distinguish these different models. We present the Bogoliubov bands of PDW. We discuss fluctuating PDW from the general perspective of fluctuating superconductivity. We discuss how Bogoliubov bands evolve when the superconducting order parameter is fluctuating. We compare theoretical predictions with existing experiments on angle-resolved photoemission spectroscopy (ARPES), infrared conductivity, diamagnetism, and lattice symmetry breaking. The material presented here is based on Ref. [38, 41, 40]. Ref. [39] is not discussed in this thesis but was completed during my time at MIT.
Author :
Release : 2015
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis The Microscopic Structure of Charge Density Waves in Underdoped YBa2Cu3O6.54 Revealed by X-ray Diffraction by :
Download or read book The Microscopic Structure of Charge Density Waves in Underdoped YBa2Cu3O6.54 Revealed by X-ray Diffraction written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: Charge density wave (CDW) order appears throughout the underdoped high-temperature cuprate superconductors, but the underlying symmetry breaking and the origin of the CDW remain unclear. We use X-ray diffraction to determine the microscopic structure of the CDWs in an archetypical cuprate YBa2Cu3O6.54 at its superconducting transition temperature ~60 K. We find that the CDWs in this material break the mirror symmetry of the CuO2 bilayers. The ionic displacements in the CDWs have two components, which are perpendicular and parallel to the CuO2 planes, and are out of phase with each other. The planar oxygen atoms have the largest displacements, perpendicular to the CuO2 planes. Our results allow many electronic properties of the underdoped cuprates to be understood. For example, the CDWs will lead to local variations in the electronic structure, giving an explicit explanation of density-wave states with broken symmetry observed in scanning tunnelling microscopy and soft X-ray measurements.
