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Experimental Study of Effective Mass and Spin–Orbital Energy of the Al2O3/NiO Nanoheterostructure Material

Authors
  • Munusamy, Gnanasekaran
  • Rajaboopathi Mani
  • Varadharajan, Krishnakumar
  • Narasimhan, Surumbarkuzhali
Type
Published Article
Journal
The Journal of Physical Chemistry A
Publisher
American Chemical Society (ACS)
Publication Date
Oct 19, 2019
Volume
123
Identifiers
DOI: 10.1021/acs.jpca.9b07366
Source
MyScienceWork
License
White

Abstract

The effective mass of the materials relies on exciton dynamics which is greatly dominated by energy gap of the materials. We examined the effective mass for the Al2O3/NiO nanoheterostructure material through polarization in the dielectric study. The mean optical effective mass was calculated to be mopt* = 5.69645 × 10–20mop/m0 in the UV–visible region (1 × 106 to 5.4 × 106 Hz). From the group and phase velocity values, we observed that Al2O3/NiO is an anisotropic material. The electron spin–orbit energy splitting associated to electron in the valence band was identified using the Gaussian-confining 3D potential under normalized angular momentum (n, l = 0, 1, 2, 3). The 1S (1S1/2) and 2S (2S1/2) orbital ionization energies were calculated to be −6.08 and −5.99 eV for AlO3/NiO. The orbital ionization energies were established from the Bohr radius aB = 5.29 × 10–11 m and donor Rydberg constant Ry = 1.097 × 107 m–1 of the identical hydrogen atom. Our study gives insights into the exciton dynamics and calculation of orbital energy for the nanoheterostructure materials.

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