Berlin 2024 – wissenschaftliches Programm

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 9: Theoretical Aspects of Condensed Matter II

MP 9.8: Vortrag

Mittwoch, 20. März 2024, 12:10–12:30, HL 102

Multiple Manifestations of Negative Local Partial Density of States — •Kanchan Meena and Prosenjit Singha Deo — S. N. Bose National Centre for Basic Sciences, Kolkata, 700106, India

Mesoscopic physics has new achievements in miniature sample fabrication. With leads, one can have a hierarchy of density of states in Larmor Clock (LC) theory. New phenomena have been seen with these local entities or formulas, like local partial density of states can become negative in the presence of Fano resonances. So such new phenomena, like negative partial states, transmission zeros, π phase shift and breakdown of parity effect etc have seen in recent works. In the presence of negative electrons can behave like positron. If one electron can attract one positron, it can attract another positrons also, which can also be seen as electron-electron attraction in mesoscopic physics. In this work, we are showing that can become negative and that can be experimentally detectable. For that, we are working with two approaches. One is a continuum model and the other is discrete or tight binding model. One can see there are multiple manifestations of time travel.

Keywords: Mesoscopic systems; Local partial density of states; Landauer formalism; Three probe conductance setup; Hierarchy of density of states