g-factors for ternary crystals of groups iii and v

Author

Liviu Mateescu, New Jersey Institute of Technology

Document Type

Thesis

Date of Award

Spring 5-31-2011

Degree Name

Master of Science in Applied Physics - (M.S.)

Department

Physics

First Advisor

N. M. Ravindra

Second Advisor

Anthony Fiory

Third Advisor

Michael R. Booty

Fourth Advisor

Vitaly A. Shneidman

Abstract

The objective of this thesis is to present a method of calculating the g-factors of ternary crystals of III-V group elements.

There is an increasing interest in knowing the magnetic behavior of different semiconductor materials, due to advances in the domain of spintronics. The g-factors were calculated for the conduction electrons, since they have the greatest contribution to the magnetic properties of the crystal. The thesis presented here proposes a method to calculate the magnetic g-factor of whole families of crystals made of three elements, of the form A_1-xB_xC, for eleven values, x ε {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9,1} , that were considered sufficient for giving an accurate behavior of the magnetic properties of the conduction electrons.

The notion of g-factor is presented and then methods are shown that permit the calculation of the g-factor in cubic crystals. The algorithm is then applied to binary crystals and the results of calculations are compared to the scarce measurement data found in literature.

Finally, relying on a series of papers that approximate the lattice parameters for ternary III-V crystals (cubic determination), the g-factor is calculated for the families of A_1-xB_xC for the x values mentioned above, and recommendations are given for an eventual enhancement of the precision.

The method presented here is but a first approximation, that is considered good enough for applications in the spintronics of the cubic crystals.

Recommended Citation

Mateescu, Liviu, "g-factors for ternary crystals of groups iii and v" (2011). Theses. 111.
https://digitalcommons.njit.edu/theses/111