Lyddane-Sachs-Teller relation

[lə′dān ′saks ′tel·ər ri‚lā·shən] (solid-state physics) For an infinite ionic crystal, the relation ε(0)/ε(∞) = ω_L²/ω_T², where ε(0) is the crystal's static dielectric constant, ε(∞) is the dielectric constant at a frequency at which electronic polarizability is effective but ionic polarizability is not, ω_Lis the frequency of longitudinal optical phonons with zero wave vectors, and ω_Tis the frequency of transverse optical phonons with large wave vector.

单词	lyddane-sachs-teller relation
释义	Lyddane-Sachs-Teller relation Lyddane-Sachs-Teller relation [lə′dān ′saks ′tel·ər ri‚lā·shən] (solid-state physics) For an infinite ionic crystal, the relation ε(0)/ε(∞) = ω_L²/ω_T², where ε(0) is the crystal's static dielectric constant, ε(∞) is the dielectric constant at a frequency at which electronic polarizability is effective but ionic polarizability is not, ω_Lis the frequency of longitudinal optical phonons with zero wave vectors, and ω_Tis the frequency of transverse optical phonons with large wave vector.
随便看	contrast medium-enhanced magnetic resonance imaging contrast mri contrast orbitography contrast pattern contrast, photographic contrast radiography contrast range contrast ratio contrast rendering factor contrast, repetition, alignment, and proximity contrast resolution contrast reversal contrasts contrast scale contrast sensitivity contrast sensitivity function contrast sensitivity testing contrast sharpening contrast shower contrast showers contrast sitz bath contrast solution contrast (someone or something) with (someone or something) contrast source-inversion contrast stain