Condensed Matter Seminar: Ordered Defects: A Roadmap towards room temperature Superconductivity and Magnetic Order

Abstract:
 
Defects in the atomic lattice of solids are sometimes desired. For example, atomic vacancies, single ones or more elaborated defective structures, can generate localized magnetic moments in a non-magnetic crystalline lattice. Increasing their density to a few percent magnetic order can appear. Furthermore, usual graphite samples, independently whether they are from natural sources, Kish or highly oriented pyrolytic graphite, bulk or powder samples, have interfaces. These interfaces occur between twisted regions with Bernal or rhombohedral or between Bernal and rhombohedral stacking orders. I discuss old and new results - from single interfaces (bilayer graphene) to multigraphene and bulk or powder graphite samples - that speak for the existence of superconductivity with a broad distribution of critical temperatures. Especial emphasis will be given to new results, which indicate the existence of granular superconductivity even above room temperature.

Event Organizer: Prof. Sasha Gerber