Theoretical investigations of size and temperature dependent normal phonon effects on lattice thermal conductivity of zigzag and armchair black phosphorus are carried out employing Boltzmann transport formalism. The phonons – heat carriers, are assumed to be scattered by resistive processes and conservative normal processes. The effects of normal phonons on scattering rates due to longitudinal and transverse phonons show significant contributions along zigzag and armchair black phosphorus. The transition of resistive scattering regime to combined resistive-normal scattering regime and its demarcation for zigzag and armchair black phosphorus is investigated at practically relevant temperatures. This transition in zigzag and armchair direction shifts towards higher phonon mean free path with decrease in temperature. The size dependent thermal conductivity investigations show considerable contributions of normal phonons in higher dimension samples. Significant reduction in thermal conductivity due to normal phonons is reported and results are compared with recent available experimental data.

利用玻尔兹曼输运形式论，对尺寸和温度依赖的正常声子对之字形和扶手椅黑磷晶格热导率的影响进行了理论研究。假设声子–载热体是通过电阻过程和保守的正常过程而散布的。由于纵向和横向声子，普通声子对散射速率的影响在之字形和扶手椅黑磷中表现出显着的贡献。在实际相关温度下研究了之字形和扶手椅黑磷的电阻散射制度向组合的电阻法向散射制度的过渡及其划分。之字形和扶手椅方向的这种过渡随着温度的降低而向更高的声子平均自由程移动。尺寸相关的热导率研究表明，高维样本中的正常声子具有相当大的贡献。据报道，由于正常的声子，导热系数显着降低，并将结果与​​最新的实验数据进行了比较。