Superconductivity is a wide spread phenomenon exhibited by metals and alloys at low temperatures. After the discovery of rare earth, bismuth and thallium copper oxides (so called the High Tc cuprates) which showed superconductivity at elevated temperatures (T>80 K), there is an avalanche of work related to strongly correlated superconductors in general Concomitant to these efforts, rapid developments have taken place in understanding the superconductivity arising from d-electron correlated systems. In this colloquium, I will describe our investigations which established unusual superconductivity in two compounds namely, Rh17S15 and BiPd. These studies have focused attention on important examples of a new strongly correlated superconductor and a new non-centrosymmetric (no inversion symmetry in the crystal structure) superconductor, two front line topics in contemporary superconductivity research in the centenary year of its discovery. Finally, I will briefly talk about our future effort to study superconductivity of elements and compounds in various forms (bulk, thin films and nano) over a wide window of temperature spanning nearly 7 decades (40 µK to 300 K) using mK and µK platforms now operating at TIFR.
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