Mihir Tendulkar

Hall conductivity dominated by fluctuations near the superconducting transition in disordered thin films

We have studied the Hall effect in superconducting tantalum nitride films. We find a large contribution to the Hall conductivity near the superconducting transition, which we can track to temperatures well above

Ultra-high bandwidth memory with 3D-stacked emerging memory cells

{T}_{c}

Superconductor to weak-insulator transitions in disordered tantalum nitride films

and magnetic fields well above the upper critical field

Resistive switching mechanisms in random access memory devices incorporating transition metal oxides: TiO2, NiO and Pr0.7Ca0.3MnO3.

{\text{H}}_{c2}(0)

Quasi-passive and reconfigurable node for optical access network

. This contribution arises from Aslamazov-Larkin superconducting fluctuations, and we find quantitative agreement between our data and recent theoretical analysis based on time-dependent Ginzburg-Landau theory.

Quasi passive optical switch based on transition metal oxide device

To increase memory bandwidth with minimum area overhead, the new concept of 3D-stacked memory structure consisting of a small sense amplifier shared with a few 3D memory cells has been presented. The 16 bit 3D-stacked TiO2 memory chip was fabricated and demonstrated. The estimated bandwidth per unit area of 3D-stacked memory in sub-65 nm CMOS technology indicates that the 3D-stacked memory has potential to achieve ultra-high bandwidth required for the future processors.

Protonic motion in Pr0.7Ca0.3MnO3 thin films and its implications on resistance change properties

We study the two-dimensional superconductor-insulator transition (SIT) in thin films of tantalum nitride. At zero magnetic field, films can be disorder-tuned across the SIT by adjusting thickness and film stoichiometry; insulating films exhibit classical hopping transport. Superconducting films exhibit a magnetic field-tuned SIT, whose insulating ground state at high field appears to be a quantum-corrected metal. Scaling behavior at the field-tuned SIT shows classical percolation critical exponents

Protonic motion in Pr

z \nu \approx

_{0.7}

1.3, with a corresponding critical field

Ca

H_c \ll H_{c2}