title: Possible Fermi liquid in the lightly doped Kitaev spin liquid.
abstract: We study the lightly doped Kitaev spin liquid (LDKSL) and find it to be the Fermi liquid. The LDKSL satisfies the two key properties of the standard Landau Fermi liquid: the low-energy quasiparticles are well defined and the Fermi sea has the quantized volume determined by Luttinger's theorem. These features can be observed in angle-resolved photoemission spectroscopy measurements. Meanwhile, the LDKSL has the topological Kitaev spin liquid surrounding the Fermi sea. So the LDKSL violates the Wiedemann-Franz law and has a large Wilson ratio. These results have the potential experimental verifiability in iridates upon doping.
authors.affiliation: Institute for Theoretical Physics, ETH Zürich, 8093 Zürich, Switzerland.
authors.forename: Jia-Wei
authors.initials: JW
authors.lastname: Mei