Signatures of a Majorana-Fermi surface in the Kitaev magnet Ag3LiIr2O6

Autor: Joshuah T. Heath, Faranak Bahrami, Sangyun Lee, Roman Movshovich, Xiao Chen, Fazel Tafti, Kevin Bedell
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Communications Physics, Vol 6, Iss 1, Pp 1-13 (2023)
Druh dokumentu: article
ISSN: 2399-3650
DOI: 10.1038/s42005-023-01403-w
Popis: Abstract Detecting Majorana fermions in experimental realizations of the Kitaev honeycomb model is often complicated by non-trivial interactions inherent to potential spin liquid candidates. In this work, we identify several distinct thermodynamic signatures of massive, itinerant Majorana fermions within the well-established analytical paradigm of Landau-Fermi liquid theory. We find a qualitative and quantitative agreement between the salient features of our Landau-Majorana liquid theory and the Kitaev spin liquid candidate Ag3LiIr2O6. Our study presents strong evidence for a Fermi liquid-like ground state in the fundamental excitations of a honeycomb iridate, and opens new experimental avenues to detect itinerant Majorana fermions in condensed matter systems.
Databáze: Directory of Open Access Journals