Physics beyond Ohm’s Law
Tsinghua University, Beijing China
Ohm's law, discovered in 1827, is one of the most important laws for quantitative
descriptions of the physics of electricity. It determines the performance and energy
usage efficiency of all electrical/electronic devices, from a tiny transistor in integrated
circuits to anywhere power lines for electric transmission and distribution in a grid.
Superconductivity and quantum Hall effect as well as quantum anomalous Hall effect
(the quantum Hall effect without external magnetic field), which do not obey the Ohm’s
Law, provide a way to solve the problem with electrical resistance for better use
of electricity. In this talk, I would talk about how to increase the transition temperature
of superconductivity and quantum anomalous Hall effect. I would argue that realization
of superconductivity and quantum anomalous Hall effect at temperatures above liquid
nitrogen boiling temperature, and particularly around room temperature, may trigger
the next industrial revolution, which is as significant as the second industrial revolution
with electricity more than 100 years ago.