Volume 78, Number 2, April 2007
|Number of page(s)||5|
|Published online||27 March 2007|
On the orientational ordering of long rods on a lattice
Department of Theoretical Physics, Tata Institute of Fundamental Research - Homi Bhabha Road, Mumbai 400 005, India
Accepted: 27 February 2007
We argue that a system of straight rigid rods of length k on a square lattice with only hard-core interactions shows two phase transitions as a function of density ρ for . The system undergoes a phase transition from the low-density disordered phase to a nematic phase as ρ is increased from 0 at , and then again undergoes a re-entrant phase transition from the nematic phase to a disordered phase at .
PACS: 05.50.+q – Lattice theory and statistics (Ising, Potts, etc.) / 64.70.Md – Transitions in liquid crystals
© Europhysics Letters Association, 2007
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