TY - JOUR

T1 - How the vibrational frequency varies with temperature

AU - Kolesov, Boris A.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - A renormalization of mode wavenumber with temperature in inorganic (silicon, diamond) and molecular crystals (α-S8) is considered. The conventional theory of wavenumber varying is based on phonon decay into other phonons. A new approach based on the process of phonon excitation and analytical expression for ω(T) function is proposed. A numerical quantity of anharmonic contributions from vibration of chemical bonds of different types is discussed. It is shown that anharmonicity of hydrogen bonds is essentially higher than that of the other types of chemical bond.

AB - A renormalization of mode wavenumber with temperature in inorganic (silicon, diamond) and molecular crystals (α-S8) is considered. The conventional theory of wavenumber varying is based on phonon decay into other phonons. A new approach based on the process of phonon excitation and analytical expression for ω(T) function is proposed. A numerical quantity of anharmonic contributions from vibration of chemical bonds of different types is discussed. It is shown that anharmonicity of hydrogen bonds is essentially higher than that of the other types of chemical bond.

KW - diamond

KW - low temperature

KW - molecular crystals

KW - silicon

KW - vibrational anharmonicity

KW - 1ST-ORDER RAMAN-SCATTERING

KW - DIAMOND

KW - LINEWIDTH

KW - SEMICONDUCTORS

KW - SILICON

KW - DEPENDENCE

KW - SHIFT

KW - CRYSTALS

KW - ANHARMONICITY

KW - OPTICAL PHONONS

UR - http://www.scopus.com/inward/record.url?scp=84994627719&partnerID=8YFLogxK

U2 - 10.1002/jrs.5009

DO - 10.1002/jrs.5009

M3 - Article

AN - SCOPUS:84994627719

VL - 48

SP - 323

EP - 326

JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

SN - 0377-0486

IS - 2

ER -