Informal Theory Seminar & New Materials Science Seminar: The dynamics of a quantum spin liquid
Date :
Monday, September 28th, 2015 1:00 PM 〜
Place :
Seminar Room 5 (A615), 6th Floor, ISSP
Lecturer : John Chalker Affiliation : University of Oxford Committee Chair : Hirokazu Tsunetsugu(ext. 63597), Toshiro Sakakibara(ext.63245)
e-mail: tsune@issp.u-tokyo.ac.jp, sakaki :at: issp.u-tokyo.ac.jp
e-mail: tsune@issp.u-tokyo.ac.jp, sakaki :at: issp.u-tokyo.ac.jp
I will describe recent theoretical results on the dynamics of a remarkably simple, exactly solvable model − the Kitaev honeycomb model − that has a spin liquid ground state. In this system, magnetic moments are “dissolved” by quantum fluctuations and reform as new degrees of freedom: mobile fermions and flux lines of an emergent gauge field. I will discuss the implications of this reorganisation, known as quantum number fractionalisation, for measurements of dynamics such as the inelastic neutron scattering response.
(Published on: Monday September 7th, 2015)