Drone-fermions in the two-dimensional antiferromagnet

✍ Scribed by S. Krivenko; G. Khaliullin

• Book ID: 103947189
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 204 KB
• Volume: 244
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)02430-8

✦ Synopsis

Two different representations of spins -via the conventional fermions, or via the Mattis drone-fermions -are compared considering the planar antiferromagnetic Heisenberg model as an example. Mean-field spin correlation functions calculated for the uniform and flux RVB states show that the drone-fermion approach has an advantage in giving the lower energy and the enhanced AF correlations, because of the absence of unphysical spinless states in this representation.