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首页> 外文期刊>Journal of Physics. Condensed Matter >HIGHER VIBRATIONAL STATES OF OH/OD IN THE BULK OF CONGRUENT LINBO3 AND IN PROTON DEUTERON EXCHANGED LAYERS AT THE SURFACE OF LINBO3
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HIGHER VIBRATIONAL STATES OF OH/OD IN THE BULK OF CONGRUENT LINBO3 AND IN PROTON DEUTERON EXCHANGED LAYERS AT THE SURFACE OF LINBO3

机译：同形LINBO3体和LINBO3表面质子决定子交换层中OH / OD的较高振动态。

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摘要

The fundamental vibrational transition <(nu)over bar>(01) and the higher vibrational transitions <(nu)over bar>02, <(nu)over bar>(03) and <(nu)over bar>(04) of the OH and the OD oscillator in the bulk of congruent LiNbO3 and in proton/deuteron exchanged LiNbO3:PE/DE surface layers are investigated with respect to their spectroscopic properties and their temperature dependence. All observed vibrational transitions are completely polarized perpendicular with respect to the ferroelectric z direction. The spectral positions of the vibrational transitions follow closely a Morse type potential with D-e = 4.75 eV and a = 22.23 nm(-1) (omega(e,OH) = 3684 cm(-1) and omega(e)x(e,OH) = 88.5 cm(-1) for LiNbO3:PE). No hint of possible hydrogen bonding was found. The integrated absorption intensity ratios of the higher vibrational transitions exhibit the existence of an electrical anharmonicity, i.e. a non-linearity of the dipole moment versus O-H separation. The electrical anharmonicity reveals a noticeable temperature dependence whereas the vibrational transition energies and therefore the mechanical anharmonicity shows no temperature dependence in the range from room temperature to liquid helium temperature. [References: 29]
机译：基本振动跃迁（01）和较高振动跃变 02，（03）和（04）研究了大部分LiNbO3和质子/氘交换的LiNbO3：PE / DE表面层中的OH和OD振荡器的光谱性质和温度依赖性。观察到的所有振动跃迁都相对于铁电z方向垂直完全极化。振动跃迁的光谱位置紧随De = 4.75 eV和a = 22.23 nm（-1）（omega（e，OH）= 3684 cm（-1）和omega（e）x（e，对于LiNbO3：PE，OH）= 88.5 cm（-1）。未发现可能存在氢键的迹象。较高振动跃迁的积分吸收强度比显示出电非谐性的存在，即偶极矩与O-H分离的非线性。电非谐性显示出显着的温度依赖性，而振动跃迁能量因此机械非谐性显示出从室温到液氦温度范围内的温度依赖性。 [参考：29]

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