Shape effect of diamagnetic susceptibility of a hydrogenic donor in a nano structured semiconductor systems

Rajamohan, C; Reuben, A. Merwyn Jasper D.; Nithiananthi, P.; Jayakumar, K.

doi:10.1007/s10910-008-9388-1

Cited by 27 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6][7][8][9][10][11] The underlying phenomena behind the intriguing and valuable attributes of quantum dot is Quantum Confinement and hence investigation on the origin and effect of confinement in QD have become one of the most essential and exciting forefront fields in modern sciences. [5,[12][13][14][15][16] There are several theoretical as well as experimental efforts towards proper understanding of confinement mechanism in QDs. Theoretically, a wide verity of approaches have been employed to elucidate this phenomena.…”

Section: Introductionmentioning

confidence: 99%

Quantum confinement induced shift in energy band edges and band gap of a spherical quantum dot

Borah

Siboh

Kalita

et al. 2018

Physica B: Condensed Matter

View full text Add to dashboard Cite

We have proposed and validated an ansatz as effective potential for confining electron/hole within spherical quantum dot in order to understand quantum confinement and its consequences associated with energy states and band gap of Spherical Quantum Dot. Within effective mass approximation formalism, considering an ansatz incorporating a conjoined harmonic oscillator and coulomb interaction as the effective potential for confining an electron or a hole within a spherical quantum dot and by employing appropriate boundary conditions we have calculated the shifts in energy of minimum of conduction band(CBM) and maximum of valence band(VBM) with respect to size of spherical quantum dot. We have also determined the quantum confinement induced shift in band gap energy of spherical quantum dot. In order to verify our theoretical predictions as well as to validate our ansatz, we have performed phenomenological analysis in comparison with available experimental results for quantum dots made of CdSe and observe a very good agreement in this regard. Our experimentally consistent theoretical results also help in mapping the probability density of electron and hole inside spherical quantum dot. The consistency of our results with available experimental data signifies the capability as well as applicability of the ansatz for the effective confining potential to have reasonable information in the study of real nano-structured spherical systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantum confinement induced shift in energy band edges and band gap of a spherical quantum dot

Borah

Siboh

Kalita

et al. 2018

Physica B: Condensed Matter

View full text Add to dashboard Cite

show abstract

“…A study on the confinement effect on the shallow donor impurity in a QWW has been carried out by Kasapogalu et al [2003]. Recently, Rajamohan et al [2008] reported the modification of diamagnetic susceptibility under the influence of the shape in nanostructured semiconductor systems. Most recently, theoretical study of both the pressure and geometrical effects on the metal-insulator transition in a cubical QD has been considered by Rajashabala and Kannan [2011].…”

Section: Introductionmentioning

confidence: 99%

Effect of geometry on the pressure induced donor binding energy in semiconductor nanostructures

Kalpana

Jayakumar

Nithiananthi

2015

Int. J. Comp. Mat. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

The effect of geometry on an on-center hydrogenic donor impurity in a GaAs/(Ga,Al)As quantum wire (QWW) and quantum dot (QD) under the influence of Γ-X band mixing due to an applied hydrostatic pressure is theoretically studied. Numerical calculations are performed in an effective mass approximation. The ground state impurity energy is obtained by variational procedure. Both the effects of pressure and geometry are to exert an additional confinement on the impurity inside the wire as well as dot. We found that the donor binding energy is modified by the geometrical effects as well as by the confining potential when it is subjected to external pressure. The results are presented and discussed.

show abstract

Influence of the LO Phonon Effect on the Transition Rate and the Spontaneous Emission Rate in Donor-Center Quantum Dot with Spherical Gaussian Confinement Potential

Xin

2022

J Low Temp Phys

View full text Add to dashboard Cite

Shape effect of diamagnetic susceptibility of a hydrogenic donor in a nano structured semiconductor systems

Cited by 27 publications

References 12 publications

Quantum confinement induced shift in energy band edges and band gap of a spherical quantum dot

Quantum confinement induced shift in energy band edges and band gap of a spherical quantum dot

Effect of geometry on the pressure induced donor binding energy in semiconductor nanostructures

Influence of the LO Phonon Effect on the Transition Rate and the Spontaneous Emission Rate in Donor-Center Quantum Dot with Spherical Gaussian Confinement Potential

Contact Info

Product

Resources

About