| Abstract Scope |
Local structure plays a 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]. There are still some long-standing puzzles in the well-studied GeO2 glass at high pressure [1].
In this conference, we present our recent approach and advance in acquiring high-quality local structure of the network-forming GeO2 glass by high-pressure XAFS[4,5], and ab initio molecular dynamics (AIMD) simulations. HP-XAFS is a well-known local structural tool, which can provide an upper-level resolution in the local structure [1-3]. The obtained results provide a deep understanding on the origin of pressure-induced polyamorphism of GeO2 glass.
References:
[1] Hong et al, JPCM 35, 164001 (2023).
[2] Hong et al, PRB 102, 134110 (2020).
[3] Hong et al, PRB 101, 214107 (2020).
[4] Hong et al, RSI 80, 073908 (2009).
[5] Hong et al, JPCM 26, 035104 (2014). |