This could also be the Asimov story "Escape!"Escape!" in which a specialized robot, "the Brain" goes a bit crazy as it develops a hyperspace drive, because the drive will cause the temporary death of the crew, which violates the First Law of Robotics. I don't think the drive "violates the laws of Physics", but it did reveal new laws. According to the Wikipedia article linked above: "The Brain has become a practical joker: it hasn't built any manual controls for the ship, no showers or beds, either, and it only provides tinned beans and milk for the crew to survive on."
I was also reminded of the Asimov story "Little Lost Robot" but it doesn't really fit, as no new device or discovery was made by the Nestor robot in that story.