Kagomé Lattice Antiferromagnet Stripped to Its Basics

Patrick Azaria, Chris Hooley, Philippe Lecheminant, Claire Lhuillier, Alexei Tsvelik

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We study a model of the spin S = 1/2 Heisenberg antiferromagnet on a one-dimensional lattice with the local symmetry of the two-dimensional Kagomé lattice. Using three complementary approaches, it is shown that the low-energy spectrum can be described by two critical Ising models with different velocities. One of these velocities is small, leading to a strongly localized Majorana fermion. These excitations are singlet ones, whereas the triplet sector has a spectral gap.
Original languageEnglish
Pages (from-to)1694–1697
Number of pages4
JournalPhysical Review Letters
Volume81
Publication statusPublished - 24 Aug 1998

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