Condensed Matter Theory Seminar | December 22, 15:00
Unveiling the hidden topology in the Fermi-surface wavefunction of metals
A metal is a solid with a Fermi surface. It is known how to reconstruct the shape of the Fermi surface – by immersing the metal in a magnetic field and measuring the period of field-induced oscillations of the magnetization/resistivity. I will show how to extract information about the quantum-mechanical wavefunction of the Fermi surface – from measuring the phase offset of these same oscillations. In some metals, this information is robust against deformations of the Hamiltonian (describing the metal), and may therefore be viewed as a topological invariant.
Yale
Seminarraum E0.03
Contact: Simon Trebst