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Accueil > Documentation > Pages nominatives > Shamashis Sengupta

Shamashis Sengupta

Research

My research addresses the topic of strongly correlated electronic systems. Electrons in solids interact with each other and with the crystal lattice giving rise to a fascinating range of collective behaviour. This is the domain of many-body physics. Complex systems composed of several interacting particles are hard to understand analytically starting from the fundamental laws governing one individual particle. Such situations lead to the development of emergent phenomena - the collection of particles exhibit ordered structures that depend strongly upon the size of the cluster and can even be insensitive to fine microscopic details.

Practical examples of such systems are several of the transition metal oxides. Electron-electron and electron-phonon interactions lead to the occurrence of superconductivity, ferromagnetism, correlated insulators, different kinds of charge and spin ordering, and other intriguing effects. We study the physics of these systems by electronic transport measurements. Methods of fabricating and manipulating low dimensional devices (commonly used in the field of nanoelectronics) are employed to control the number of particles in the system and to understand the effects of spatial confinement on correlated states.

Career timeline

2003 - 2006: Undergraduate studies in physics at Presidency College, Kolkata
2006 - 2012: Graduate student and Ph.D. researcher at Tata Institute of Fundamental Research (TIFR), Mumbai
2012 - 2016: Postdoctoral researcher at Université Paris-Sud, Orsay (CSNSM and LPS)
2016: Joined CSNSM with a permanent position as a CNRS Chargé de Recherche

Contact

email: shamashis.sengupta@csnsm.in2p3.fr, shamashis.sengupta@u-psud.fr

Selected publications

(A complete list is provided here on Google Scholar.)

1. Universal Fabrication of 2D Electron Systems in Functional Oxides
Tobias Chris Rödel, Franck Fortuna, Shamashis Sengupta, Emmanouil Frantzeskakis, Patrick Le Fèvre, François Bertran, Bernard Mercey, Sylvia Matzen, Guillaume Agnus, Thomas Maroutian, Philippe Lecoeur and Andrés Felipe Santander-Syro
Advanced Materials doi:10.1002/adma.201505021 (2016)

2. Plasmon mode modifies the elastic response of a nanoscale charge density wave system
Shamashis Sengupta, Niveditha Samudrala, Vibhor Singh, Arumugam Thamizhavel, Peter B. Littlewood, Vikram Tripathi and Mandar M. Deshmukh
Physical Review Letters 110, 166403 (2013)

3. Field-effect modulation of conductance in VO2 nanobeam transistors with HfO2 as the gate dielectric
Shamashis Sengupta, Kevin Wang, Kai Liu, Ajay K. Bhat, Sajal Dhara, Junqiao Wu and Mandar M. Deshmukh,
Applied Physics Letters 99, 062114 (2011)

4. Electromechanical resonators as probes of the charge density wave transition at the nanoscale in NbSe2
Shamashis Sengupta, Hari S. Solanki, Vibhor Singh, Sajal Dhara and Mandar M. Deshmukh
Physical Review B 82, 155432 (2010)

5. Probing thermal expansion of graphene and modal dispersion at low-temperature using graphene nanoelectromechanical systems resonators
Vibhor Singh, Shamashis Sengupta, Hari S Solanki, Rohan Dhall, Adrien Allain, Sajal Dhara, Prita Pant and Mandar M Deshmukh
Nanotechnology 21, 165204, (2010)