Enantiomer-dependent study of photogalvanic effects in the multifold fermion PdGa
Weyl topological materials with chiral crystal structures provide a valuable platform for investigating the relationship between structural chirality and nonlinear optical response. Using terahertz emission photogalvanic effect spectroscopy, the authors demonstrate here that both bulk and surface states of the multifold fermion material PdGa yield transients whose sign depends on material handedness. Surface-specific measurements further reveal that the nature of the helicoidally dispersing state is reflected in the complementary dependence of the photocurrent direction as a function of photon energy.
Authors
- Sujan Subedi (ORCID: https://orcid.org/0000-0003-2869-0106)
- Darius H. Torchinsky (ORCID: https://orcid.org/0000-0001-6497-2237)
- Wesley E. Deeg (ORCID: https://orcid.org/0009-0001-2406-6632)
- Manita Rai (ORCID: https://orcid.org/0000-0002-6751-3770)
- Michael J. Zdilla (ORCID: https://orcid.org/0000-0003-0212-2557)
- Claudia Felser (ORCID: https://orcid.org/0000-0002-8200-2063)
- Chandra Shekhar
- Alexandre Crosbie
Institutions
- Temple College (US)
- Max Planck Institute for Chemical Physics of Solids (DE)
- Temple University (US)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-11-13
- DOI
- https://doi.org/10.1103/qy9k-z8rz
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00