YFe6Ge6 Eletronic band structure: a novel Fe-based Kagome lattice

• Grant number: 25/16534-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2025
• End date: October 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Fernando Assis Garcia
• Grantee: Vitória Gabriely Fernandes Haydu
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 24/13291-8 - Disentangling Electronic excitations in Hund Metals, AP.R

Abstract

In this project, we propose an investigation of the electronic band structure of YFe6Ge6 single crystals by angle-resolved photoemission spectroscopy (ARPES) experiments. This metallic material undergoes and antiferromagnetic (AFM) transition at T_N=480 K, associated with the ordering of the Fe spins. The Fe sub-lattice is a layered structure organized in a Kagome lattice, making YFe6Ge6 an example of a strongly interacting spin system in a Kagome lattice. Single crystals of this material were only recently synthesized by our group and collaborators. Our work will be supported by DFT+DMFT calculations. This project aims at the education of a scientist in the methods of the experimental characterization of the electronic band structure of metals and is concomitantly motivated by a hot topic in condensed matter physics.