Speaker
Description
We are rapidly approaching the centenary of quantum mechanics making this a good time to reflect on the past as a springboard for the bold research that the 21st century community of physicists can aspire to. One of the unexpected discoveries of Quantum Mechanics is Spin, a concept introduced in 1925 by a young German at Columbia University, Ralph Kronig. Kronig's bold thesis was strongly refuted by Pauli who claimed "it is indeed very clever but of course has nothing to do with reality”, so sadly Kronig chose not to publish. Modern credit for spin goes to Uhlenbeck and Goudsmid. Sometimes it is important to be bold.
In this talk I will discuss spins as the basic quantum building blocks: stem-cells for entanglement and emergence. The incredible aspect of spin are their versatility, for they not only induce magnetism, they can entangle with their surroundings, forming heavy fermion metals and insulators, spin liquids, and heavy fermion superconductors.
I will motivate our discussion with some modern mysteries: the apparent neutral Fermi surface of SmB$_6$, "Lazarus superconductivity” in UTe$_2$ and Flux memory in 4Hb-TaS$_2$. In each of cases, spin transforms the metallic state in surprising ways. I will discuss a possible connection with the CPT model[1] - a solvable model for superconductivity formed between fractionalized spins and electrons.
| Data protection policy | I agree. |
|---|
