Tobias Esswein

Mr. Esswein’s computational research explored the existence of quantum criticality and its possible relationship to superconductivity in dielectric potassium tantalate. He found that this material exhibits a ferro-electric quantum critical point, with the quantum phase transition occuring as a function of electron doping. He discovered that the quantum critical point coincides with the emergence of superconductivity, suggesting a correlation between the phenomena as in strontium titanate.