Structural stability and electronic properties of different cross-sectional unstrained and rectangular cross-sectional strained GaP nanowires

Date

2019-02-10

Author

Mohammad, Rezek
Katırcıoğlu, Şenay

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

158
views

0
downloads

The stability and electronic properties of the hexagonal, trigonal and rectangular cross-sectional GaP nanowires in wurtzite (WZ) phase are investigated using full potential linear augmented plane waves method. The rectangular cross-sectional nanowires are found more stable than the hexagonal and trigonal ones. The indirect bandgap structure of the nanowires is transformed into the direct bandgap one at a critical size connected to the geometry of the cross-section. The energy bandgap of the nanowires in the same cross-sectional group is enlarged by the quantum size effect. The effective carrier masses in the nanowires, calculated to be larger than those in bulk GaP, are found to slightly increase with the decrease in the size of the nanowires in the same cross-sectional groups. The mechanical strain effect on the electronic band structure is investigated for the rectangular GaP nanowires under the uniaxial and lateral strains. It is found that the indirect bandgap structures of the rectangular nanowires are transformed into the direct bandgap ones by the uniaxial high compression strains. It is also found that this transformation can be triggered by small uniaxial tensile and high lateral tensile strains in addition to the effect of size increase. The energy bandgap of the rectangular nanowires is determined to be narrowed by the uniaxial/lateral strains. It is obtained that the small rectangular nanowire is in the indirect bandgap structure for all the lateral strains and the larger one can be transformed into the direct bandgap structure more easily by the x-directional lateral tensile strains compared to the y-directional ones. The effective electron and hole masses are found to be reduced by the uniaxial highest tensile and compression strains of this work. It is determined that the lateral strains are not effective in making the electrons of the nanowires more mobile, but the y-directional lateral high tensile strains make the holes more mobile by reducing the effective hole mass in the small rectangular nanowire.

Subject Keywords

Statistical and Nonlinear Physics, Condensed Matter Physics

URI

https://hdl.handle.net/11511/46422

Journal

INTERNATIONAL JOURNAL OF MODERN PHYSICS B

DOI

https://doi.org/10.1142/s0217979219500061

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Multi-band polarization independent cylindrical metamaterial absorber and sensor application Dincer, Furkan; KARAASLAN, MUHARREM; Colak, Sule; TETİK, ERKAN; AKGÖL, OĞUZHAN; ALTINTAŞ, OLCAY; Sabah, Cumali (World Scientific Pub Co Pte Lt, 2016-03-30) A multi-band perfect metamaterial absorber (MA) based on a cylindrical waveguide with polarization independency is numerically presented and investigated in detail. The proposed absorber has a very simple configuration, and it operates at flexible frequency ranges within the microwave frequency regime by simply tuning the dimensions of the structure. The maximum absorption values are obtained as 99.9%, 97.5%, 85.8%, 68.2% and 40.2% at the frequencies of 1.34 GHz, 2.15 GHz, 3.2 GHz, 4.31 GHz and 5.41 GHz, re...
JOINT ENTROPY OF THE HARMONIC OSCILLATOR WITH TIME-DEPENDENT MASS AND/OR FREQUENCY Akturk, Ethem; ÖZCAN, ÖZGÜR; Sever, Ramazan (World Scientific Pub Co Pte Lt, 2009-04-30) Time-dependent joint entropy is obtained for harmonic oscillator with the time-dependent mass and frequency case. It is calculated by using time-dependent wave function obtained via Feynman path integral method. Variation of time dependence is investigated for various cases.
THERMODYNAMIC QUANTITIES AT HIGH PRESSURES IN THE i AND theta PHASES OF SOLID NITROGEN DEDUCED BY RAMAN FREQUENCY SHIFTS FOR THE INTERNAL MODES IN LITERATURE Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2013-04-10) The pressure dependence of the Raman frequencies of the internal modes is analyzed (T = 300 K) for the phases i and theta of solid nitrogen using the experimental data from the literature. Through the mode Gruneisen parameter, the isothermal compressibility kappa(T), thermal expansion alpha(p) and the specific heat C-p - C-v are calculated as a function of pressure using the Raman data in these phases.
Experimental study on the velocity limits of magnetized rotating plasmas Teodorescu, C.; Clary, R.; Ellis, R. F.; Hassam, A. B.; Lunsford, R.; Uzun Kaymak, İlker Ümit; Young, W. C. (AIP Publishing, 2008-04-01) An experimental study on the physical limits of the rotation velocity of magnetized plasmas is presented. Experiments are performed in the Maryland Centrifugal Experiment (MCX) [R. F. Ellis , Phys. Plasmas 12, 055704 (2005)], a mirror magnetic field plasma rotating azimuthally. The externally applied parameters that control the plasma characteristics-applied voltage, external magnetic field, and fill pressure-are scanned across the entire available range of values. It is found that the plasma rotation veloc...
Quantum information entropies of the eigenstates of the Morse potential Aydiner, Ekrem; Orta, Cenk; Sever, Ramazan (World Scientific Pub Co Pte Lt, 2008-01-30) The position and momentum space information entropies for the Morse potential are numerically obtained for different strengths of the potential. It is found to satisfy the bound obtained by Beckner, Bialynicki-Birula, and Mycielski. Interesting features of the entropy densities are graphically demonstrated.

Citation Formats

R. Mohammad and Ş. Katırcıoğlu, “Structural stability and electronic properties of different cross-sectional unstrained and rectangular cross-sectional strained GaP nanowires,” INTERNATIONAL JOURNAL OF MODERN PHYSICS B, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46422.