Majorana Landau-level Raman spectroscopy

Brent Perreault, Stephan Rachel, F. J. Burnell, Johannes Knolle

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9 Scopus citations

Abstract

The unambiguous experimental detection of quantum spin liquids and, in particular, of the long-sought Kitaev quantum spin liquid (KQSL) with its Majorana fermion excitations remains an outstanding challenge. One of the major obstacles is the absence of signatures that definitively characterize this phase. Here, we propose the Landau levels known to form in the Majorana excitation spectrum of the KQSL when certain strain fields are applied as a direct signature of Majorana fermions with Dirac-like dispersion. In particular, we show that the Majorana Landau level quantization of strained films of the KQSL can be directly probed by Raman spectroscopy. Such experiments are feasible in thin films of α-RuCl3, which are a promising place to search for the KQSL.

Original languageEnglish (US)
Article number184429
JournalPhysical Review B
Volume95
Issue number18
DOIs
StatePublished - May 25 2017

Bibliographical note

Publisher Copyright:
© 2017 American Physical Society.

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