PIRSA:13040134

Spin-1/2 Heisenberg Antiferromagnet on the Kagome Lattice: a Z2 Spin Liquid with Fermionic Spinons

Hao, Z. (2013). Spin-1/2 Heisenberg Antiferromagnet on the Kagome Lattice: a Z2 Spin Liquid with Fermionic Spinons. Perimeter Institute. https://pirsa.org/13040134

Hao, Zhihao. Spin-1/2 Heisenberg Antiferromagnet on the Kagome Lattice: a Z2 Spin Liquid with Fermionic Spinons. Perimeter Institute, Apr. 25, 2013, https://pirsa.org/13040134 

          @misc{ pirsa_PIRSA:13040134,
            doi = {10.48660/13040134},
            url = {https://pirsa.org/13040134},
            author = {Hao, Zhihao},
            keywords = {Condensed Matter},
            language = {en},
            title = {Spin-1/2 Heisenberg Antiferromagnet on the Kagome Lattice: a Z2 Spin Liquid with Fermionic Spinons},
            publisher = {Perimeter Institute},
            year = {2013},
            month = {apr},
            note = {PIRSA:13040134 see, \url{https://pirsa.org}}
          }

Zhihao Hao University of Waterloo

DOI 10.48660/13040134
Collection
Talk Type Conference
Subject

Abstract

Motivated by recent numerical and experimental studies of the spin-1/2 Heisenberg antiferromagnet on kagome, we formulate a many-body model for fermionic spinons, which are just uncoupled spins. The spinons interact with an emergent U(1) gauge field and experience strong short-range attraction in the S=0 channel. The ground state of the model is generically a Z(2) liquid. We calculate the edge of the two-spinon continuum and compare the theory to the slave-fermion approach to the Heisenberg model.