Center for the Advancement of Topological Semimetals Research Highlights

SMOKE without ferromagnetism: Optical rotation in topological antiferromagnets

Understanding the unique response properties of magnets can lead to significant impacts on physical sciences and technology.

Using bicircular light to design electronic symmetry and topology

Irradiation of topological materials with intense bicircular light offers a versatile way to control bulk and surface states and transport on ultrafast timescales.

A Geometric Paradigm for the Optical Properties of Crystals

Geometric properties of electronic wave functions determine how crystalline solids respond when absorbing light

Using Photocurrents to Control the Symmetry of a Weyl Semimetal

Optically driven photocurrents can break the electronic symmetry in a Weyl semimetal

Tuning Electronic Structures through Strain (CATS)

Tuning Electronic Structures through Strain

A 3D representation of magnetoelastoresistance

Topological Quantum Switching via Light-Driven Raman Coherence (CATS)

A topological switching principle is established by periodically driven, Raman phonon oscillations.
Time-dependence of such periodic driving is revealed which is needed for topological transistors and THz quantum gate applications.

Spin-to-charge conversion in a magnetic Weyl semimetal

The unique topological band crossings in the magnetic Weyl semimetal controls the spin-to-charge conversion. This provides novel pathways to manipulate the effect and can be exploited in potential applications in quantum materials.

Fractional Quantum Hall Effect in Weyl Semimetals

Strong electron-electron interactions can give rise to an energy gap without breaking crystal translational symmetry. This leads to a unique state, a 3D version of nonabelian 2D fractional quantum Hall liquids. The properties of this exotic state may be useful in quantum computing applications.