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Guoyin Shen

As seen in: Science Magazine, Physical Review B
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Articles

Synthesis and Tuning of Multifunctional Materials at High Pressure

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By Peter Lazor, Roland Mathieu, Guoyin Shen
| avhandlingar.se
Nyckelord: NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; double perovskite; multiferroic; bandgap engineering; high-entropy alloy; high pressure; Geovetenskap med inriktning mot mineralogi; petrologi och tektonik; Earth Science with specialization in Mineral Chemistry; Petrology and Tectonics; Sammanfattning: At the present stage, human society is developing at an unprecedented speed, facing an emergence of highly pressing challenges, e.g., information explosion, energy...
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Electronic bonding transitions in oxide glass above two megabar pressures

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By Yong-Hyun Kim, Paul Chow, Yuming Xiao, Guoyin Shen
| Physical Review B
Inelastic x-ray scattering (IXS) of B2O3 glass up to ∼2.2 Mbar reveals electronic bonding transitions in oxide glasses. B K-edge IXS identifies the high-energy feature above ∼1.4 Mbar and a gradual increase in its intensity toward ∼2.2 Mbar, indicating the formation of hypervalent boron via electron polarization to oxygen atoms. The pressure-driven high energy shifts in O K-edge IXS indicate pronounced electronic dispersion that increases upon densification of amorphous oxides above ∼2 Mbar.
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