Disorder and non-Hermiticity in Kitaev spin liquids with a Majorana Fermi surface

• We study the effect of disorder on ?2 quantum spin liquids with a Majorana Fermi line (respectively a surface in three dimensions), and we show that depending on the symmetries that are preserved on average, qualitatively different scenarios will occur. In particular, we identify the relevant non-Hermitian symmetries for which disorder will effectively split the Fermi line into two exceptional lines, with Re⁡(?)=0 states filling the area in between. We demonstrate the different scenarios using both toy models as well as large-scale numerical simulations.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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