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Unique Dirac and Triple point fermiology in simple transition metals and their binary alloys
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- Noble metal surfaces (Au, Ag and Cu etc.) have been extensively studied for the Shockley type surface states (SSs). Very recently, some of these Shockley SSs have been understood from the topological consideration, with the knowledge of global properties of electronic structure. In this letter, we show the existence of Dirac like excitations in the elemental noble metal Ru, Re and Os based on symmetry analysis and first principle calculations. The unique SSs driven Fermi arcs have been investigated in details for these metals. Our calculated SSs and Fermi arcs are consistent with the previous transport and photo-emission results. We attribute these Dirac excitation mediated Fermi arc topology to be the possible reasons behind several existing transport anomalies, such as large non-saturating magneto resistance, anomalous Nernst electromotive force and its giant oscillations, magnetic breakdown etc. We further show that the Dirac like excitations in these elemental metal can further be tuned to three component Fermionic excitations, using symmetry allowed alloy mechanism.
- Subjects :
- Physics
Condensed Matter - Materials Science
Electromotive force
Condensed matter physics
Magnetoresistance
Strongly Correlated Electrons (cond-mat.str-el)
Triple point
Astrophysics::High Energy Astrophysical Phenomena
Dirac (software)
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
02 engineering and technology
Electronic structure
021001 nanoscience & nanotechnology
01 natural sciences
symbols.namesake
Condensed Matter - Strongly Correlated Electrons
0103 physical sciences
symbols
Condensed Matter::Strongly Correlated Electrons
Nernst equation
010306 general physics
0210 nano-technology
Fermi Gamma-ray Space Telescope
Surface states
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....d3e970c5540d0d80274fb1b87061bb20
- Full Text :
- https://doi.org/10.48550/arxiv.1910.00196