| Issue |
EPL
Volume 78, Number 2, April 2007
|
|
|---|---|---|
| Article Number | 20003 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/78/20003 | |
| 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
Corresponding authors: ananda@theory.tifr.res.in ddhar@theory.tifr.res.in
Received:
13
November
2006
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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