Angle Resolved Photoemission Spectroscopy Of Delafossite Metals PDF Download
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Author | : Veronika Sunko |
Publisher | : Springer |
Total Pages | : 198 |
Release | : 2020-10-08 |
Genre | : Science |
ISBN | : 9783030310899 |
Download Angle Resolved Photoemission Spectroscopy of Delafossite Metals Book in PDF, ePub and Kindle
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.
Author | : Philippa H. McGuinness |
Publisher | : Springer Nature |
Total Pages | : 151 |
Release | : 2022-10-01 |
Genre | : Science |
ISBN | : 3031142446 |
Download Probing Unconventional Transport Regimes in Delafossite Metals Book in PDF, ePub and Kindle
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.
Author | : |
Publisher | : |
Total Pages | : 40 |
Release | : 2013 |
Genre | : |
ISBN | : |
Download The Rise of Angle Resolved Photoemission Spectroscopy Book in PDF, ePub and Kindle
Author | : Zahid Hussain |
Publisher | : |
Total Pages | : 508 |
Release | : 1979 |
Genre | : Transition metals |
ISBN | : |
Download Angle-resolved Photoemission Studies of Transition Metals in the Energy Range 8-1500 EV Book in PDF, ePub and Kindle
Author | : Wayne C. Tonjes |
Publisher | : |
Total Pages | : 248 |
Release | : 2001 |
Genre | : Chalcogenides |
ISBN | : |
Download Angle Resolved Photoemission Studies of Transition Metal Dichalcogenides Book in PDF, ePub and Kindle
Author | : S. D. Barrett |
Publisher | : |
Total Pages | : 83 |
Release | : 1992 |
Genre | : Low energy electron diffraction |
ISBN | : |
Download Angle-resolved Photoemission and LEED from Rare-earth Metals Book in PDF, ePub and Kindle
Author | : Maja D. Bachmann |
Publisher | : Springer Nature |
Total Pages | : 167 |
Release | : 2020-08-28 |
Genre | : Technology & Engineering |
ISBN | : 3030513629 |
Download Manipulating Anisotropic Transport and Superconductivity by Focused Ion Beam Microstructuring Book in PDF, ePub and Kindle
This thesis presents pioneering work in the relatively new field of focused ion beam (FIB) sculpting of single crystals to produce bespoke devices and enable the investigation of physics that cannot be studied in bulk samples. It begins with a comprehensive and didactic account of how to achieve this sculpting, revealing the ‘tricks of the trade’ of state-of-the-art FIB microstructuring. In subsequent chapters, the author presents ground-breaking results obtained from microstructures of the delafossite oxide metal PdCoO2 and the heavy fermion superconductor CeIrIn5. In these elegant, forefront experiments, a new form of directional ballistic transport in the ultra-pure delafossites is described and explained. Furthermore, a new way to spatially modulate superconductivity induced by strain is demonstrated with electrical transport measurements that agree well with predictions based on thermoelastic finite element simulations.
Author | : H. Adam Stevens |
Publisher | : |
Total Pages | : 82 |
Release | : 1983 |
Genre | : Photoelectron spectroscopy |
ISBN | : |
Download Angle resolved photoemission spectroscopy Book in PDF, ePub and Kindle
Author | : Sara Riccò |
Publisher | : |
Total Pages | : 89 |
Release | : 2018 |
Genre | : |
ISBN | : |
Download Angle-resolved Photoemission Studies of the Metal-insulator Transition in Lightly Rare Earth Doped Ca2RuO4 Book in PDF, ePub and Kindle
Author | : Jeffrey Daniel Mottershead |
Publisher | : |
Total Pages | : |
Release | : 2012 |
Genre | : |
ISBN | : |
Download Angle-resolved Photoemission Spectroscopy Studies of Tl2Ba2CuO6+δ and YBa2Cu3O7-δ Book in PDF, ePub and Kindle