  We explore the phase coherence of thin films of the topological insulator
material Bi2Se2Te grown through pulsed laser deposition (PLD) technique. The
films were characterised using various techniques for phase and composition.
The films were found to be of good quality. We carried out extensive
magneto-transport studies of these films and found that they exhibit two
dimensional weak antilocalization behaviour. A careful analysis revealed a
relatively high phase coherence length (58nm at 1.78K) for a PLD grown film.
Since PLD is an inexpensive technique, with the possibility to integrate with
other materials, one can make devices which can be extremely useful for low
power spintronics and topological quantum computation.
