Department of Physics, Panjab University, Chandigarh, India

TPSC seminar

Time and date: 23 November 2012 (Friday), 4:00 pm
Venue: Seminar Hall

Title: Liquid crystals: Testing grounds for science and technology

Speaker: Prof. Satyendra Kumar, Department of Physics, Kent State University, Ohio, USA

Abstract: Liquid crystals (LC) uniquely combined the disorder, a characteristic of the fluid phase, with partial order of crystalline phase giving rise to a multiplicity of stable phases with varying symmetry. These phases have been used as test systems to test theoretical ideas such as the presence of Landau-Peierl's instability in the smectic-A phase, 2D melting via a bond-orientationally ordered hexatic phase, similarity between the superconducting and the smectic-A phases, and as model systems for biological membranes. Only one of over 60 liquid crystal phases, known as the nematic LC, is used in the ubiquitous flat panel displays. Several other phases, e.g., cholesteric, biaxial nematic, and ferroelectric smectic phases hold the potential for next generation of LC technology. I will discuss these and other aspects of this fascinating class of condensed matter systems.