TY - JOUR
T1 - Double semion phase in an exactly solvable quantum dimer model on the kagome lattice
AU - Buerschaper, Oliver
AU - Morampudi, Siddhardh C.
AU - Pollmann, Frank
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/11/26
Y1 - 2014/11/26
N2 - Quantum dimer models typically arise in various low energy theories like those of frustrated antiferromagnets. We introduce a quantum dimer model on the kagome lattice which stabilizes an alternative Z2 topological order, namely the so-called "double semion" order. For a particular set of parameters, the model is exactly solvable, allowing us to access the ground state as well as the excited states. We show that the double semion phase is stable over a wide range of parameters using numerical exact diagonalization. Furthermore, we propose a simple microscopic spin Hamiltonian for which the low-energy physics is described by the derived quantum dimer model.
AB - Quantum dimer models typically arise in various low energy theories like those of frustrated antiferromagnets. We introduce a quantum dimer model on the kagome lattice which stabilizes an alternative Z2 topological order, namely the so-called "double semion" order. For a particular set of parameters, the model is exactly solvable, allowing us to access the ground state as well as the excited states. We show that the double semion phase is stable over a wide range of parameters using numerical exact diagonalization. Furthermore, we propose a simple microscopic spin Hamiltonian for which the low-energy physics is described by the derived quantum dimer model.
UR - http://www.scopus.com/inward/record.url?scp=84919391560&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.90.195148
DO - 10.1103/PhysRevB.90.195148
M3 - Article
AN - SCOPUS:84919391560
SN - 1098-0121
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
M1 - 195148
ER -