Описание: This thesis describes in-depth studies of the remarkable electronic transport within the ultrahigh conductivity delafossite metals PtCoO_2 and PdCoO_2 using the tool of focused ion beam (FIB) microstucturing. Despite being first synthesised over 50 years ago, important questions remain regarding both the origin of the unusually high conductivity of these compounds and the consequences of their unique properties for unconventional electronic transport, such as that within the ballistic regime. The thesis explores both these areas. High-energy electron irradiation is used to examine the effects of deliberately introducing point defects into PdCoO_2 and PtCoO_2, demonstrating that the extremely low resistivity of these materials stems from an extreme purity as high as 1 defect in 120,000 atoms, rather than a novel scattering suppression mechanism. In addition, studies of the electronic transport in micron-scale squares of these metals show that their broadly hexagonal Fermi surfaces lead not only to long range ballistic behaviour but novel ballistic regime phenomena which cannot be observed in materials with a higher-symmetry Fermi surface.
Описание: This thesis describes the results of angle resolved photoemission spectroscopy experiments on delafossite oxide metals, and theoretical work explaining these observations. The study was motivated by the extraordinarily high conductivity of the non-magnetic delafossites PdCoO2 and PtCoO2, the measurement of whose electronic structure is reported and discussed. Two unexpected effects were observed in the course of the investigation; each is described and analysed in detail. Firstly, a previously unrecognised type of spectroscopic signal, allowing the non-magnetic probe of photoemission to become sensitive to spin-spin correlations, was observed in the antiferromagnetic PdCrO2. Its origin was identified as the Kondo-like coupling of itinerant and Mott insulating electrons. Furthermore, surface states exhibiting an unusually large Rashba-like spin-splitting were observed on the transition metal terminated surfaces of delafossites. The large inversion symmetry breaking energy scale, a consequence of the unusual structure of the surface layer, is identified as the origin of the effect.
Описание: This thesis describes the results of angle resolved photoemission spectroscopy experiments on delafossite oxide metals, and theoretical work explaining these observations. Furthermore, surface states exhibiting an unusually large Rashba-like spin-splitting were observed on the transition metal terminated surfaces of delafossites.
Описание: Experiments have similarly not been able to observe coherent vortex dynamics. This thesis resolves this challenge, bringing microphotonic techniques to bear on two-dimensional superfluid helium, observing coherent vortex dynamics for the first time, and achieving this on a silicon chip.
Описание: This thesis focuses on the study of the optical response of new atomically thin two-dimensional crystals, principally the family of transition metal dichalcogenides like MoS2.
Автор: O. M. Phillips; Klaus Hasselmann Название: Wave Dynamics and Radio Probing of the Ocean Surface ISBN: 1468489828 ISBN-13(EAN): 9781468489828 Издательство: Springer Рейтинг: Цена: 18237.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: In 1960, Dr. George Deacon ofthe National Institute ofOceanography in England organized a meeting in Easton, Maryland that summarized the state of our understanding at that time of ocean wave statistics and dynamics.
Автор: Dryzek Название: Positron Profilometry ISBN: 3031410920 ISBN-13(EAN): 9783031410925 Издательство: Springer Рейтинг: Цена: 4877.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: David Verney; Fran?ois Le Blanc; Nathalie Lecesne Название: LAP 2012 ISBN: 9400764944 ISBN-13(EAN): 9789400764941 Издательство: Springer Рейтинг: Цена: 12196.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The Institut de Physique Nucleaire d`Orsay and the Grand Accelerateur National d`Ions Lourds in Caen had been in charge of the organization of this event, co-sponsored by the Institut National de Physique Nucleaire et de Physique des Particules (IN2P3) and the Laboratory Physique des 2 Infinis et des Origines (P2IO).
Автор: Arief Suriadi Budiman Название: Probing Crystal Plasticity at the Nanoscales ISBN: 9812873341 ISBN-13(EAN): 9789812873347 Издательство: Springer Рейтинг: Цена: 6839.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Introduction.- Synchrotron White-beam X-ray Microdiffraction at the Advanced Light Source, Berkeley Lab.- Electromigration-induced Plasticity in Cu Interconnects: The Length Scale Dependence.- Electromigration-induced Plasticity in Cu Interconnects: The Texture Dependence.- Industrial Implications of Electromigration-induced Plasticity in Cu Interconnects: Plasticity-amplified Diffusivity.- . Indentation Size Effects in Single Crystal Cu as Revealed by Synchrotron X-ray Microdiffraction.- Smaller is Stronger: Size Effects in Uniaxially Compressed Au Submicron Single Crystal Pillars.- Conclusions and Future Directions.
Описание: Introduction.- Part I Single-Site- and Single-Atom-Resolved Detection of Atomic Limit Mott Insulators.- Superfluid-Mott-Insulator Transition.- Overview of the Experimental Procedure.- Single-Site-Resolved Imaging and Thermometry of Atomic Limit Mott Insulators.- Part II Single-Site- and Single-Atom-Resolved Detection of Correlation Functions.- Detection of Particle-Hole Pairs Using Two-Site Correlation Functions.- Non-Local Correlations in One Dimension.- Non-Local Correlations in Two Dimensions, Duality and Distribution Functions.- Part III 'Higgs' Amplitude Mode.- Introduction to Amplitude and Phase Modes.- Detection of the Higgs Amplitude Mode at the 2d SF-Mott-Insulator Transition.- Outlook.- Part IV Appendix.- Appendix A Experimental Details.- Appendix B Numerical Methods for Correlation Functions.- Appendix C Calculation for Non-Local Correlations in One Dimension.- Appendix D Calculation for Non-Local Correlations in Two Dimensions.
Описание: This thesis focuses on the study of the optical response of new atomically thin two-dimensional crystals, principally the family of transition metal dichalcogenides like MoS2.
ООО "Логосфера " Тел:+7(495) 980-12-10 www.logobook.ru
