Time and place: 2018.9.3, 10:00 am, Wuhan National High Magnetic Field Center B206

Presenter: Dmitry Smirnov

Title: When high magnetic fields meet optical spectroscopy: probing electronic structure and interaction effects in novel electronic and magnetic materials

Abstract：

A magnetic field is one of the few fundamental thermodynamic parameters (alongside with temperature or pressure, for example) widely used in experimental condensed matter physics to probe or induce new states of matter. The magnetic field can be applied in situ in a highly controllable manner, reversibly and with perfect tunability. It lifts degeneracy of electronic orbital and spin states, breaks time reversal symmetry, introduces energy and length scales of quantum states that may result in establishing new field-induced order and quantum effects.

A review of recent experimental results obtained at the US National High Magnetic Filed Lab is given to demonstrate the aptitude of high-field magneto-spectroscopy methods in studying novel electronic and magnetic materials. Illustrative examples from the portfolio of our research will include: (i) Probing and controlling excitons in monolayer transition metal dichalcogenides (MoSe₂, WSe₂) with high magnetic fields, (ii) infrared magneto-spectroscopy of Dirac (ZrTe₅) and Weyl (NbP) semimetals, (iii) magneto-Raman probe of magneto-elastic coupling in a quasi-2D, frustrated quantum antiferromagnet SrCu₂(BO₃)₂.