论文标题
apd3o4中的电子 - 音波耦合：a = ca，sr和sr0.85li0.15
Electron-phonon coupling in APd3O4: A = Ca, Sr, and Sr0.85Li0.15
论文作者
论文摘要
在这里，我们研究了电子 - 音波耦合在狭窄带隙半导体APD3O4（A = CA，SR）和孔掺杂系统SR0.85LI0.15PD3O4的拉曼光谱上的作用。通过因子组分析预测的所有三种化合物，在室温下观察到四个拉曼活性声子。观察到与PD振动相关的最低能量声子（〜190/202 cm-1）在所有三种化合物中表现出不对称的Fano样线形，表明声子与电子连续体之间存在相互作用。根据我们的激光功率和温度依赖性拉曼结果，讨论了电子连续态和电子音波耦合的起源。我们已经观察到在低温下SR0.85LI0.15PD3O4中电子波耦合的强度增强，这可以归因于该掺杂化合物中的金属性。
Here we have investigated the role of electron-phonon coupling on the Raman spectrum of narrow bandgap semiconductors APd3O4 (A = Ca, Sr) and hole-doped system Sr0.85Li0.15Pd3O4. Four Raman active phonons are observed at room temperature for all three compounds as predicted by factor group analysis. The lowest energy phonon (~190/202 cm-1) associated with Pd vibrations is observed to exhibit an asymmetric Fano-like lineshape in all the three compounds, indicating the presence of an interaction between the phonon and the electronic continuum. The origin of the electronic continuum states and electron-phonon coupling are discussed based on our laser power- and temperature-dependent Raman results. We have observed an enhanced strength of electron-phonon coupling in Sr0.85Li0.15Pd3O4 at low temperatures which can be attributed to the metallicity in this doped compound.
