Mahendra Lal Sircar memorial lecture for 2005

SPEAKER: Prof. Jainendra K. Jain,  Erwin Mueller professor of physics
Pennsylvania State University, U.S.A
TITLE: Composite Fermions - a new class of fermions in physics
DATE:  1st August, 2005
TIME:  3:00 pm


    When electrons in two dimensions are exposed to  a strong magnetic field,they form a new "superfluid". It is neither a Bose Einstein condensate nor a super conductor,but provides a new paradigm for collective behaviour in nature.I will show that the formation of  a new class of topological fermions called "composite fermions" which are a combination of matter (electrons) and quantum mechanical phases(quantised vortices), is responsible for the exotic properties of this state.


    Jainendra K Jain obtained his Bachelor's degree from Jaipur in 1979 and his Master's degree from IIT Kanpur in 1981. His Ph D was in 1985 from the State University of New York, Stony Brook. He is currently the Erwin Mueller Professor of physics in Pennsylvanis State University.

    His work centres around trying to understand the unexpected conceptual structures that arise when electrons behave collectively. This lead to his proposal of the composite fermion which has been immensely successful in providing a consistent picture of the quantum hall effect(QHE). This approach not only unifies the  integer and fractional QHE but also provides a natural explanation for the even denominatorsin fractional QHE.

    Prof. Jain received the Sloan fellowship in 1991, the Guggenheim fellowship in 1996 and in 2002 won the Oliver Buckley  Prize of the American Physical Society, which is the highest award for condensed matter physics in USA. In addition,he won the SPS excellence in teaching award in 2003.