Electron Auto-Localization Tailored by Its Thermal Energy: Dynamic Matrix Approach (DMA)

• 作者: Idriss Fomadjo Fokou Michael Nana Jipdi Martin Tchoffo Lukong Cornelius Fai
• 来源期刊: 应用数学与应用物理(英文)
• 学科: 工学
• 关键词: Autolocalization Quantum Phase Transition SELF-TRAPPING Critical Temperature
• 年，卷（期）: 2021,（3）
• 页码范围: 515-527
• 页数: 13页
• 分类号: TN2

摘要

This paper investigates the thermal energy effect on electron auto-localization. The polaron characteristics (self-action potential and effective mass) are observed to be expressed via the renormalized electron-phonon coupling constant tailored by the thermal energy. Low temperatures are observed to favour auto-localization of the carrier while high temperatures favour polaron undressing and subsequent quenching of the quantum behaviour thereby rendering the system classical. The critical (transition) temperature <em>τ_c</em> expressed via the critical coupling constant <span style="white-space:nowrap;">&#978;</span><em>_C</em> is found to be the separating boundary between the quantum and the classical phases. Therefore, the polaron undergoes phase transition (from self-tapped to quasi free states) when the temperature of the medium is enhanced.