The effect of a new position-dependent effective mass on the optical properties of a hydrogenic donor in a spherical quantum dot

BAYRAK K., KAYA D., Gök G., BAYRAK O.

Annals of Physics, cilt.479, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 479
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.aop.2025.170074
  • Dergi Adı: Annals of Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC, zbMATH
  • Anahtar Kelimeler: Linear and nonlinear absorption coefficients, Position dependent mass, Spherical quantum dot
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The influence of a new position-dependent effective mass on the electronic and optical properties of a hydrogenic donor in a GaAs quantum dot is investigated. The electron mass is modeled as a function of spatial position, temperature, and hydrostatic pressure, allowing for a more comprehensive understanding of the system's behavior under varying external conditions. The position-dependent radial Schrödinger equation is solved for the spherical Coulomb potential, and the bound state energy eigenvalues, along with the corresponding wave functions, are computed using the Runge–Kutta method. The effects of position-dependent effective mass and donor radius on confinement energy, dipole matrix element, absorption coefficient, and refractive index change are analyzed. This study underscores the importance of incorporating position-dependent mass, temperature, and hydrostatic pressure in calculating the electronic and optical properties of the hydrogenic donor in the GaAs quantum dot.