Kitaev Materials and Time-Dependent Majorana Mean-Field Theory

Kitaev Materials and Time-Dependent Majorana Mean-Field Theory
March 30, 2022
Monday, April 18, 2022

Join us for the Physics Condensed Matter Seminar at 2:30 - 3:30 pm
Title: Kitaev materials and time-dependent Majorana mean-field theory

Abstract: As a rare example of an exactly solvable 2D quantum spin system, the Kitaev model has generated considerable theoretical interest as a playground for anyonic, neither fermionic nor bosonic, physics. Engineering the peculiar bond-dependent Ising interactions in a material initially seemed challenging, but today there is a collection of “Kitaev materials” known to host significant Kitaev interactions.  In all such materials, however, other spin-spin interactions remain significant and whether or not the Kitaev spin-liquid is found in some region of their phase diagram remains an open question. In this talk, we will discuss our approach using time-dependent Majorana mean-field theory to compute the results of inelastic neutron scattering experiments in models near, but beyond, the Kitaev model. We find that features in the exact model are more robust than previously thought, perhaps implying that the materials are farther from the Kitaev model than expected.

Join Zoom Meeting
Meeting ID: 999 8202 1890 Passcode: 954439

Location: 3 Physics North

Speaker: Tessa Cookmeyer

Affiliation: UC Berkeley