TY - JOUR
T1 - Tilted and helical columnar phases for an axially symmetric discoidal system
AU - Chakrabarti, D.
AU - Wales, D.J.
PY - 2008/3/25
Y1 - 2008/3/25
N2 - We report novel phase behavior for a system of disclike ellipsoidal particles interacting via a pair potential. We identify a structural phase transition between two hexagonal columnar phases, both tilted, induced by spatial ordering of the tilt about the columnar axis and positional correlations between neighboring columns upon cooling. The local minima of the potential energy surface support irregular helical arrangements of the discoids about the columnar axis for the high-temperature hexagonal columnar phase, and a tilted arrangement for both phases. Our study demonstrates that dispersion-repulsion forces corresponding to oblate ellipsoids are sufficient to produce a columnar phase that is tilted and helical.
AB - We report novel phase behavior for a system of disclike ellipsoidal particles interacting via a pair potential. We identify a structural phase transition between two hexagonal columnar phases, both tilted, induced by spatial ordering of the tilt about the columnar axis and positional correlations between neighboring columns upon cooling. The local minima of the potential energy surface support irregular helical arrangements of the discoids about the columnar axis for the high-temperature hexagonal columnar phase, and a tilted arrangement for both phases. Our study demonstrates that dispersion-repulsion forces corresponding to oblate ellipsoids are sufficient to produce a columnar phase that is tilted and helical.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-41549120529&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.100.127801
DO - 10.1103/PhysRevLett.100.127801
M3 - Article
AN - SCOPUS:41549120529
SN - 0031-9007
VL - 100
SP - 127801
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
ER -