Academic qualifications:
Ph.D. in Physics
Tata Institute of Fundamental Research, Mumbai (2007)
Thesis title “Finite size effects in nanostructured superconductors”
Master of Science in Physics
Calcutta University (2000)
Bachelor of Science in Physics (Honors)
Calcutta University (1998)
Professional Experience:
Alexander Von Humboldt (Post-doctoral) Fellow, Nanoscale Science Department, Max Planck Institute for Solid State Research, Stuttgart, Germany.(August 2007- January 2010)
Visiting Scientist, Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai. (February 2010-June 2010)
Awards and distinctions:
1. Qualified CSIR-NET examination for Junior research fellowship 2001.
2. Received 2nd prize in the Young Physicists colloquium, 2006 organized by the Indian Physical Society, for the presentation of “Finite size effects in Nanostructured Superconductors”
3. Received the Alexander von Humboldt Fellowship (2008).
4. Received the INSA Young Scientist medal, 2008 given by the Indian National Science Academy.
Research:
My research interest is broadly based on experimental condensed matter physics and nanoscience. Specialized topics of interest are listed below.
Nanomaterials and low dimensional systems, Thin films, Superconductivity, Magnetism,Transport based spectroscopic measurements, Low temperature Physics, Low temperature Scanning tunneling microscopy (STM)
My past as well as current research work concerns with the study of electronic properties of various low dimensional systems primarily nanoscale superconductors.
My work on nanoscale superconductivity involves the study of finite size effects in two class of systems; nanostructured thin films and single, isolated nanoparticles. The main motivation was to investigate the role of reduced dimensionality for particle sizes below the characteristic length scales (coherence length and the penetration depth) in superconductors.
The superconducting properties of the nanostructured thin films were measured using bulk measurements like magnetization, transport and energy resolved spectroscopic tools like Point contact Andreev reflection and planar tunneling. Single, isolated nanoparticles were measured using UHV low temperature STM. Some of the highlights of my work are:
1. Determination of the critical particle diameter for the destruction of superconductivity consistent with the theoretical prediction.
2. Elucidation on the mechanism of the evolution of Tc with reduction in particle size in nanostructured thin films of Nb and Pb.
3. Observation of novel physical phenomena such as “shell effects” in superconducting Sn .
4. Observation of influence of thermodynamic fluctuations on the tunneling density of states and energy gap in small particles.
My current interest revolves around the study of electronic properties of superconducting and magnetic thin films, nanostructures and nanocomposites using transport based spectroscopic methods.
Selected publications in International journals:
Papers related to Nanoscale superconductivity
1.Mechanism of the size dependence of superconducting transition temperature in nanocrystalline Nb
Sangita Bose, Pratap Raychaudhuri, Rajarshi Banerjee, Parinda Vasa and Pushan Ayyub, Phys Rev Lett. 95, 147003 (2005)
2.Upper critical field in nanostructured Nb: Competing effects of the reduction in density of states and the mean free path Sangita Bose, Pratap Raychaudhuri, Rajarshi Banerjee and Pushan Ayyub, Phys. Rev. B, 74, 224502 (2006)
3. Study of proximity effect in Pb/Ag nanocomposites
Sangita Bose and Pushan Ayyub, Phys. Rev. B, 76, 144510 (2007)
4. Proximity effect controlled superconducting behavior of novel biphasic Pb-Sn nanoparticles embedded in an Al matrix
Sangita Bose et al. , Acta Materialia, 56, 4552 (2008)
5. Competing effects of surface phonon softening and quantum size effects on the superconducting properties of nanostructured Pb
Sangita Bose et al., J. Physics, Condens. Matter, 21, 205702 (2009)
6. Observation of shell effects in superconducting nanoparticles of Sn
Sangita Bose et al., Nature Materials 9, 550-554 (2010), Highlighted in Nature Nanotechnology 5, 558 (2010)
http://www.nature.com/nnano/journal/v5/n8/full/nnano.2010.166.html
Other topics
7. Size effects on the local magnetism and Kondo behaviour of isolated Fe impurity in nanocrystalline metallic hosts
S. N. Mishra, S. Bose, P. Vasa and P. Ayyub, Phys. Rev. B 71, 094429 (2005)
8. Quasiparticle Chirality in Epitaxial Graphene Probed at the Nanometer Scale
I. Brihuega, P. Mallet, C. Bena, S. Bose, C. Michaelis, L. Vitali, F. Varchon, L. Magaud, K. Kern & J. Y. Veuillen, Phys. Rev. Lett., 101, 206802 (2008)
9. Image potential states as quantum probe of graphene interfaces
Sangita Bose et al. New Journal of Physics, 12, 023028 (2010) |
Physics 
