Welcome to Superconductivity Lab,CG24

The phenomenon of superconductivity has captured the imagination of specialists and general public alike, ever since its discovery a hundred years ago. In our laboratory we focus on the study of unconventional and disordered superconductors using a combination of magneto-transport, tunneling (planar tunnel junctions and Scanning tunneling spectroscopy), Andreev reflection spectroscopy and penetration depth measurements. Using a variety of home-built systems we perform these measurements down to 300mK and up to magnetic fields of 12 Tesla. You will find more details of our work in our research pages


Indranil Roy was awarded for the Best Short Talk at the " National Conference On Quantum Condensed Matter (QMAT) ", held at IISER MOHALI from 25th to 27th July 2018.

Talk Title " Observation of a hexatic liquid phase in vortex lattice of 2-D MoGe thin films."

Surajit Dutta was awarded the Best Poster Prize at the " National Conference On Quantum Condensed Matter (QMAT) ", held at IISER MOHALI from 25th to 27th July 2018.

Poster Title " Melting of vortex lattice in 2D MoGe thin films. "

2017 Publications

Magnetic field induced emergent inhomogeneity in a superconducting film with weak and homogeneous disorder
Rini Ganguly, Indranil Roy, Anurag Banerjee, Harkirat Singh, Amit Ghosal, and Pratap Raychaudhuri
Phys. Rev. B 96, 054509 (2017).

Dynamic transition from Mott-like to metal-like state of the vortex lattice in a superconducting film with a periodic array of holes
Indranil Roy, Prashant Chauhan, Harkirat Singh, Sanjeev Kumar, John Jesudasan, Pradnya Parab, Rajdeep Sensarma, Sangita Bose, Pratap Raychaudhuri
Phys. Rev. B 95, 054513.

2016 Publications

Anomalous gap-edge dissipation in disordered superconductors on the brink of localization
Bing Cheng, Liang Wu, NJ Laurita, Harkirat Singh, Madhavi Chand, Pratap Raychaudhuri, N.P. Armitage
Phys. Rev. B 93, 180511.

Disorder-induced two-step melting of vortex matter in Co-intercalated NbSe2 single crystals
Somesh Chandra Ganguli, Harkirat Singh, Indranil Roy, Vivas Bagwe, Dibyendu Bala, Arumugam Thamizhavel, and Pratap Raychaudhuri
Phys. Rev. B 93, 144503.

Orientational coupling between the vortex lattice and the crystalline lattice in a weakly pinned Co0.0075NbSe2 single crystal
Somesh Chandra Ganguli, Harkirat Singh, Rini Ganguly, Vivas Bagwe, Arumugam Thamizhavel and Pratap Raychaudhuri
J. Phys.: Condens. Matter 28, 165701

2015 Publications

Disordering of the vortex lattice through successive destruction of positional and orientational order in a weakly pinned Co0.0075NbSe2 single crystal
Somesh Chandra Ganguli, Harkirat Singh, Garima Saraswat, Rini Ganguly, Vivas Bagwe, Parasharam Shirage, Arumugam Thamizhavel & Pratap Raychaudhuri
Scientific Reports 5, 10613

Origin of matching effect in anti-dot array of superconducting NbN thin films
Sanjeev Kumar, Chandan Kumar, John Jesudasan, Vivas Bagwe, Pradnya Parab, Pratap Raychaudhuri and Sangita Bose
Supercond. Sci. Technol. 28, 055007

The Higgs mode in disordered superconductors close to a quantum phase transition
Daniel Sherman, Uwe S. Pracht, Boris Gorshunov, Shachaf Poran, John Jesudasan, Madhavi Chand, Pratap Raychaudhuri, Mason Swanson, Nandini Trivedi, Assa Auerbach, Marc Scheffler, Aviad Frydman and Martin Dressel
Nature Physics 11, 188192

Slowing down of vortex motion at the Berezinskii-Kosterlitz-Thouless transition in ultrathin NbN films
Rini Ganguly, Dipanjan Chaudhuri, Pratap Raychaudhuri, and Lara Benfatto
Phys. Rev. B 91, 054514

Highly oriented, free-standing, superconducting NbN films growth on chemical vapor deposited graphene
Garima Saraswat, Priti Gupta, Arnab Bhattacharya and Pratap Raychaudhuri
APL Mat. 2, 056103

Note :

TIFR announces the Jawaharlal Nehru Post-doctoral Visiting Scientists Scheme with very attractive salaries. Minimum one year postdoctoral experience required. Appointment term is for one year but can be extended by one more year.
Please e-mail for details.