Visualizing Higher-Fold Topology in Chiral Crystals
Cochran TA, Belopolski I, Manna K, Yahyavi M, Liu Yiyuan , Sanchez DS, Cheng Zi-Jia , Yang XP, Multer D, Yin Jia-Xin , Borrmann H, Chikina A, Krieger JA, Sanchez-Barriga J, Le Fevre P, Bertran F, Strocov VN, Denlinger JD, Chang Tay-Rong , Jia Shuang , Felser C, Lin H, Chang Guoqing , Hasan MZ (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 130
Article Number: 066402
Journal Issue: 6
DOI: 10.1103/PhysRevLett.130.066402
Abstract
Novel topological phases of matter are fruitful platforms for the discovery of unconventional electromagnetic phenomena. Higher-fold topology is one example, where the low-energy description goes beyond standard model analogs. Despite intensive experimental studies, conclusive evidence remains elusive for the multigap topological nature of higher-fold chiral fermions. In this Letter, we leverage a combination of fine-tuned chemical engineering and photoemission spectroscopy with photon energy contrast to discover the higher-fold topology of a chiral crystal. We identify all bulk branches of a higher-fold chiral fermion for the first time, critically important for allowing us to explore unique Fermi arc surface states in multiple interband gaps, which exhibit an emergent ladder structure. Through designer chemical gating of the samples in combination with our measurements, we uncover an unprecedented multigap bulk boundary correspondence. Our demonstration of multigap electronic topology will propel future research on unconventional topological responses.
Involved external institutions
Princeton University
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
National Cheng Kung University
Taiwan (TW)
Peking University (PKU) / 北京大学
China (CN)
Paul Scherrer Institute (PSI)
Switzerland (CH)
Nanyang Technological University (NTU)
Singapore (SG)
Academia Sinica / 中央研究院
Taiwan (TW)
United States (USA) (US)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
National Cheng Kung University
Taiwan (TW)
Peking University (PKU) / 北京大学
China (CN)
Paul Scherrer Institute (PSI)
Switzerland (CH)
Nanyang Technological University (NTU)
Singapore (SG)
Academia Sinica / 中央研究院
Taiwan (TW)
How to cite
APA:
Cochran, T.A., Belopolski, I., Manna, K., Yahyavi, M., Liu Yiyuan, ., Sanchez, D.S.,... Hasan, M.Z. (2023). Visualizing Higher-Fold Topology in Chiral Crystals. Physical Review Letters, 130(6). https://dx.doi.org/10.1103/PhysRevLett.130.066402
MLA:
Cochran, Tyler A., et al. "Visualizing Higher-Fold Topology in Chiral Crystals." Physical Review Letters 130.6 (2023).
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