Magneto-Photo-Thermoelastic Disturbances in a Generalized Rotating Semiconductor Medium with Variable Thermal Properties
摘要
This work introduces the first comprehensive analytical framework that simultaneously integrates dual-phase-lag heat conduction, temperature-dependent material properties, photothermal carrier dynamics, rotation, and magnetic field effects for semiconductor analysis. The primary novelty lies in unifying these complex phenomena into a single, solvable model. The research focuses on understanding the behavior of coupled photothermal, elastic, and plasma waves as they propagate through a semiconductor material. The material is subjected to a complex set of extreme conditions, including continuous rotation, strong magnetic fields, and significant temperature variations that alter its fundamental properties. The key finding is that these extreme multiphysics conditions have complex and often competing influences on the semiconductor’s behavior. Dual-phase-lag heat conduction acts to suppress temperature peaks but unexpectedly increases shear stress. Rotation provides a damping effect on the overall response and can even invert the direction of displacement. Magnetic fields tend to amplify all physical fields, while variable thermal conductivity reduces thermal peaks but raises carrier density and stress. The governing equations, which are inherently nonlinear due to the temperature-dependent properties, are first linearized using a Kirchhoff transformation. Following this, exact analytical solutions for the coupled physical fields are derived using a powerful normal mode analysis technique. This advanced model provides a critical and reliable design tool for a new generation of technologies operating under extreme multiphysics conditions. Key applications include the optimization of ultrafast laser processing, the design of robust rotating sensors, the development of space-based photodetectors, and the engineering of advanced micro- and nano-electromechanical systems (MEMS/NEMS).