TY - JOUR
T1 - Kagomé Lattice Antiferromagnet Stripped to Its Basics
AU - Azaria, Patrick
AU - Hooley, Chris
AU - Lecheminant, Philippe
AU - Lhuillier, Claire
AU - Tsvelik, Alexei
PY - 1998/8/24
Y1 - 1998/8/24
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/0000976065
M3 - Article
SN - 0031-9007
VL - 81
SP - 1694
EP - 1697
JO - Physical Review Letters
JF - Physical Review Letters
ER -