작일부터 내린 많은 눈으로 인하여,

금일 예정된 아래의  세미나가 취소되었음을 안내드립니다.

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○ Topic: The Hidden Ferro-rotational  Density Wave and Axial Higgs from  RTe3’s Quantum Geometry

○ Speaker: Kenneth Burch (Department of Physics, Boston College)

○ Date/time: 2024. 11. 28(Thu.) 14:30 PM

○ Place:  Natural Science 1,  Room No. 31317

○ Abstract: Detecting unconventional density waves and identifying their underlying mechanism has proven particularly challenging. Here, I will discuss our discovery of a rare ferro-rotational CDW order from orbital modulation requiring a nontrivial order parameter. Using Raman spectroscopy and quantum interference, we revealed the first Axial Higgs mode associated with charge order. Additional Raman, Second Harmonic, and Scanning Transmission Electron Microscope experiments establish this occurs in a density wave that breaks all vertical mirrors but maintains inversion symmetry. The Raman and Mu-SR experiments further confirm the absence of time-reversal symmetry breaking. I will discuss how this can be explained by a rare combination of orbital and charge order that results from the unique quantum geometry of Rare-Earth Tritellurides.