Effect of high pressure on the vibrational modes and the energy gap of ZnP 2
作者： A Jayaraman , RG Maines , T Chattopadhyay , None
DOI: 10.1007/BF02846343
关键词: Blueshift 、 Raman spectroscopy 、 Band gap 、 Nuclear magnetic resonance 、 Hydrostatic pressure 、 Thermal expansion 、 Molecular physics 、 Crystal 、 Double bond 、 Materials science 、 Molecular vibration
摘要: The pressure dependence of the vibrational modes in ZnP2 has been investigated by Raman Spectroscopy using a diamond anvil cell, up to 150 kbar pressure. intrachain phosphorus exhibit strong whereas low frequency Zn-P soften very slightly under For crystal which is treated as molecular this an unexpected result. It suggested that behaviour may be due buckling chain, or double bond promotion between P atoms, charge transfer shift energy gap also measured 100 hydrostatic There small initial blue gradually changes over red shift. However whole quite small. Combining (dEg/dP) T with published (dEg/dT) thermal expansion contribution and electron-phonon interaction were evaluated. latter dominates total ZnP2.
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