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Apr 03, 2020

Theory of Two-Dimensional Nonlinear Spectroscopy for the Kitaev Spin Liquid

Mr Wonjune Choi and his Ph.D. supervisor Prof Yong Baek Kim proposed a new two-dimensional non-linear spectroscopy method for unambiguous detection of fractionalized particles in quantum spin liquids.

Theory of Two-Dimensional Nonlinear Spectroscopy for the Kitaev Spin Liquid

Two dimensional nonlinear magnetic susceptibility shows the flux gap E_2 - E_0 and sharp diagonal signals (green, orange, black lines) for Majorana fermions. In contrast to the broad continuum signals from neutron scattering, two-dimensional spectroscop

Using the exactly solvable model of quantum spin liquids, they demonstrated that higher-order two-dimensional non-linear susceptibilities would show sharp signatures of Majorana fermions, elusive particles that exist in quantum spin liquids, in contrast to conventional spectroscopic methods. This work is recently published in Physical Review Letters.

The link to the paper is as follows.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.117205