230 citations · 514 across the 17 of their papers we have counts for
12 papers · 1 filter
Negative differential resistance state in the free-flux-flow regime of driven vortices in a single crystal of 2H-NbS
Biplab Bag, Sourav M. Karan, Gorky Shaw +3
Time series measurements in 2H-NbS crystal had unravelled a drive induced transition wherein the critical current (Ic) changes from a low to a high Ic jammed vortex state, via…
Evidence of diamagnetic fluctuations above Tc in BaFe2-xCoxAs2 single crystals
Biplab Bag, K. Vinod, A. Bharathi +1
Increasing doping concentration (x) in Pnictide superconductors results in the suppression of long range magnetic order and the emergence of superconductivity. While doping destroy…
Anamalous positive magnetization signal at the onset of normal to superconductor transition in single crystal Nb sphere
P. D. Kulkarni, S. S. Banerjee, H. Suderow +2
We report the observation of positive magnetization signal at the onset of superconducting transition in isothemral and isomagnetic measurements in single crystal Niobium sphere. T…
Critical behavior at de-pinning of a driven disordered vortex matter in 2H-NbS2
Gorky Shaw, Pabitra Mandal, S. S. Banerjee +5
We report unusual jamming in driven ordered vortex flow in 2H-NbS2. Reinitiating movement in these jammed vortices with a higher driving force, and halting it thereafter once again…
Scanning microscopies of superconductors at very low temperatures
V. Crespo, A. Maldonado, J. A. Galvis +7
We discuss basics of scanning tunneling microscopy and spectroscopy (STM/S) of the superconducting state with normal and superconducting tips. We present a new method to measure th…
Visualizing a dilute vortex liquid to solid phase transition in a Bi2Sr2CaCu2O8 single crystal
Gorky Shaw, Pabitra Mandal, S. S. Banerjee +1
Using high sensitivity magneto-optical imaging we find evidence for a jump in local vortex density associated with a vortex liquid to solid phase transition just above the lower cr…
Direct evidence of magnetic correlations deep inside the superconducting state of CaFe1.94Co0.06As2
Pabitra Mandal, Gorky Shaw, S. S. Banerjee +3
Imaging local magnetic field distribution in a single crystal of superconductor CaFe1.94Co0.06As2 shows the presence of anomalous remnant magnetization within Meissner like regions…
Driven weak to strong pinning crossover in partially nanopatterned 2H-NbSe2 single crystal
Gorky Shaw, Jaivardhan Sinha, Shyam Mohan +1
Investigations into the heterogeneous pinning properties of the vortex state created by partially nano-patterning single crystals of 2H-NbSe2 reveal an atypical magnetization respo…
NaAlSi: a self-doped semimetallic superconductor with free electrons and covalent holes
H. B. Rhee, S. Banerjee, E. R. Ylvisaker +1
The layered ternary sp conductor NaAlSi, possessing the iron-pnictide "111" crystal structure, superconducts at 7 K. Using density functional methods, we show that this compound is…
Giant low frequency velocity fluctuations in a driven vortex lattice
Shyam Mohan, Jaivardhan Sinha, S. S. Banerjee +3
The driven state of a well-ordered flux line lattice in a single crystal of 2H-NbSe2 in the time domain has revealed the presence of substantial fluctuations in velocity, with larg…
Effect of Diorder on the Peak Effect and Structure of Flux Line Lattice in 2H-NbSe2
S. S. Banerjee
The effect of disorder on flux line lattice (FLL) melting is studied via the Peak Effect phenomenon. On the upper branch of the Peak Effect curve, where this effect is more robust,…
Disorder, History Dependence and Phase Transitions in a Flux Lattice
S. S. Banerjee
The vortex lattice is an ideal system to study the competition and interplay between interaction and disorder. New results on 2H-NbSe_2 (in samples of progressively increasing pinn…