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Meeting MS&T23: Materials Science & Technology
Symposium Emergent Materials Under Extremes and Decisive In Situ Characterizations
Presentation Title HP-XAFS and Its Application to Topological Insulator Bi2Te3
Author(s) Xinguo Hong
On-Site Speaker (Planned) Xinguo Hong
Abstract Scope Local structure plays an dominant role in the structural polymorphsim and novel electronic properties under extreme conditions, but its accurate measurement at high pressure remains a formidable challenge [1-3]. XAFS is a well-known local structural tool, which can provide an upper level resolution in the short order of local structure, but suffers from Bragg reflections of single-crystal diamond anvils [4,5]. Recently we have succeeded in obtain high-quality X-ray absorption fine structure at high pressure[5,6], being able to probe the subtle structural and electronic polymorphs[2,3,7]. We will report our recent progress in the high-pressure XAFS to decipher the puzzling origin of the intriguing electronic states in the isostructural R-3m phase of Bi2Te3 at high pressure. We will show that the combination of accurate local structure is critically important for understanding the isostructural electronic states and the connection between the structure and function as in Bi2Te3 at high pressure [2].


Capturing Laser Induced Dynamics of Materials via Single-Shot Ultrafast Transmission Electron Microscopy
HP-XAFS and Its Application to Topological Insulator Bi2Te3
In-situ Observations of the High Temperature Melting Behaviour of Ce-brannerite
In-situ Raman Studies on Synthesis and Oxidation of UC1-xNx
In-situ/Operando Characterization of Emerging Materials with MeV Ultrafast Electron Diffraction at SLAC National Accelerator Laboratory
In Situ Characterization and Modeling of Spent UO2 Fuel under Ion Irradiation
Irradiation Induced Structural and Thermal Conductivity Changes in Nuclear Fuels
Magnetic Scattering and Spectroscopy at High Pressures at APS and APS-U
Modulation of Structure-function Motifs in Optoelectronic Metal Halides Using High Pressure
Neutron Scattering for Studying Materials Under Extreme Conditions
Perspectives of IXS and NRS Studies in the APSU Era
Polar Magnets in High-Pressure Exotic Perovskites
Pressure-induced Non-monotonic Crossover of Steady Relaxation Dynamics in a Metallic Glass
Pressure Driving Dual-layer Superconductivity in 4Hb-TaSe2 TMD
Structural Manipulation of Ceramic Materials via Extreme Conditions
Will High-entropy Carbides Be Enabling Materials for Extreme Environments?

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