Photoinduced lattice instability in snse

Author: kbrp

August undefined, 2024

WebYijing Huang, 2, 3 Shan Yang, Samuel Teitelbaum, 3 Gilberto De la Peña, 3 Takahiro Sato, Matthieu Chollet, Diling Zhu, Jennifer L. Niedziela, 7 Dipanshu Bansal ... WebHere we report a novel nonthermal lattice instability induced by ultrafast above-gap excitation in SnSe, a representative of the IV-VI class of semiconductors that provides a …

Orbitally driven giant phonon anharmonicity in SnSe - Nature

WebSnSe is one of the highest-performing bulk thermoelectric materials, with a record-breaking ability to generate electricity from heat. ... The ability to separate photoinduced changes to lattice structure and charge density is a new capability that the group seeks to explore further. McGill Newsroom: Watching the Hidden Life of Materials WebHuang, Y. ; Yang, S. ; Teitelbaum, S. ; De la Pena, G. ; Sato, T. ; Chollet, M. ; Zhu, D. ; Niedziela, J. L. ; Bansal, D. ; May, A. P. ; et al. Photoinduced Lattice ... open bank account icici bank

Observation of a Novel Lattice Instability in Ultrafast Photoexcited SnSe

WebWe demonstrate via time-resolved x-ray diffraction that SnSe has a photo-induced lattice instability associated with an orthorhombic distortion of the rock-salt structure. This … WebFeb 17, 2024 · Here we demonstrate the generation of a novel above-gap photoexcited lattice instability in SnSe that is distinct form the second-order phase transition associated that makes it an exceptionally good bulk thermoelectric material. We reconstruct the time-dependent atomic-positions using ultrafast x-ray diffraction and reveal that the lattice is ... WebAug 1, 2024 · However, a direct connection between electronic structure and the strong anharmonicity in SnSe, which underpins its ultralow thermal conductivity, has remained elusive. This question is deeply connected with the phonon mode instability and the microscopic mechanism of the phase transition. In this article, we show how the lattice … iowa in-home daycare rates

(PDF) Photoinduced Lattice Instability in SnSe

WebOct 13, 2024 · October 13, 2024. Yijing Huang, a postdoctoral scholar at the Department of Energy’s SLAC National Accelerator Laboratory, has received the 2024 LCLS Young Investigator Award for her observation of novel photo-induced lattice instability in femtosecond optical pump and x-ray probe diffraction. The award celebrates early-career … The intensity variations of Bragg peaks at 300 K show a similar trend compared with those observed at 90 K (Fig. 3a), implying that atomic displacements also take place at 300 K during the photoexcitation process. However, the Bragg peak intensities drop faster at 300 K (time constant τ300K ~1.7 ps), comparing to … See more Figure 1a shows a schematic of the MeV-UED experimental setup, where we record diffraction patterns along zone from a single-crystal SnSe as a function … See more The full effect of the phonon contributions to the electron diffraction is also encoded in the diffuse scattering surrounding the Bragg peaks. To monitor the subtle … See more The asymmetrical intensity distribution in the difference maps of the Bragg peaks in time domain is unexpected and cannot be explained by short-wavelength … See more To understand the origin of the domain formation, we performed the DFT calculations (Supplementary Note 11). After tens to hundreds of femtoseconds, the … See more iowa inhome registered providersWebdistortion toward a different structure with Immm symmetry. The Immm structure of SnSe is an orthorhombic distortion of the rocksalt structure and does not occur in equilibrium. Density functional theory calculations reveal that the photoinduced Immm lattice instability arises from electron excitation open bank account for under 16

"WebIllustration of lattice structure and lattice softening in SnSe. (a) double bilayer structure of SnSe The in the Pnma phase with Peierls distortions (left panel) and the high-symmetry Cmcm ... is a further evidence supporting our interpretation of a photoinduced switch of point-group symmetry in SnSe. In fact,the A g (0) phonon is determined by ... " - Photoinduced lattice instability in snse

Orbitally driven giant phonon anharmonicity in SnSe - Nature

Observation of a Novel Lattice Instability in Ultrafast Photoexcited SnSe

Photoinduced lattice instability in snse

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