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Number‐of‐layer, pressure, and temperature resolved bond–phonon–photon cooperative relaxation of layered black phosphorus
Author(s) -
Liu Yonghui,
Yang Xuexian,
Bo Maolin,
Zhang Xi,
Liu Xinjuan,
Sun Chang Q.,
Huang Yongli
Publication year - 2016
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4964
Subject(s) - phonon , bond length , debye model , condensed matter physics , relaxation (psychology) , chemistry , band gap , photon , bond energy , materials science , molecular physics , optics , crystallography , physics , molecule , psychology , social psychology , organic chemistry , crystal structure
We systematically examined the effects of number‐of‐layer, pressure, and temperature on the bond length and energy, Debye temperature, atomic cohesive energy, and binding energy density for layered black phosphorus using bond–phonon–photon spectrometric methods. We clarified the following: (1) atomic under‐coordination shortens and stiffens the PP bond, which raises the B 2g and A g 2 phonon frequency and widens the bandgap, (2) bond thermal elongation and weakening soften all phonon modes, and (3) bond mechanical compression has the opposite effect of heating on phonon frequency relaxation. The phonon and photon energy depends on the bond length and energy, which determines the relevant elasticity and thermal stability of layered structure. More broadly, the approaches and findings of this work provide both insight into and efficient tools for further exploration of unusual behaviors of other two‐dimensional substance. Copyright © 2016 John Wiley & Sons, Ltd.