Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model

Details Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model

1999-12-14

arxiv.org/abs/cond-mat/9912228v1

Phil. Mag. B 80, 1483 (2000).

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, 9 figures. Extended version of the invited talk, presented at the ITP Conference on Quantum Magnetism, Santa Barbara

Scientific paper

10.1080/01418630050114682

We overview some recent work and present new results on the ground state properties and the spectrum of excitations of the two-dimensional frustrated Heisenberg antiferromagnet. Spontaneous dimer order is present in the quantum disordered phase of this model. We study the stability and analyze the structure of the spectrum, including the two-particle singlet excitation branch throughout the disordered phase, as well as in the vicinity of the Neel critical point. The variation of the dimer order parameter is also given, and it is argued that near the critical point it reflects the presence of the low-energy singlet bound state.

Affiliated with

Also associated with

No associations

Rating

Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spontaneous dimer order, excitation spectrum, and quantum phase transitions in the J1-J2 Heisenberg model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-430392