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Volumn 59, Issue 8, 1999, Pages 5678-5687

Electronic structures of [110]-faceted self-assembled pyramidal inas/gaas quantum dots

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0001114091     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.59.5678     Document Type: Article
Times cited : (261)

References (55)
  • 1
  • 4
    • 0030716879 scopus 로고    scopus 로고
    • and other quantum dot articles in the same issue.
    • P. L. McEuen, Science 278, 1729 (1997);and other quantum dot articles in the same issue.
    • (1997) Science , vol.278 , pp. 1729
    • McEuen, P.L.1
  • 5
    • 85038325626 scopus 로고    scopus 로고
    • Semiconductor Quantum Dots, edited by Alex Zunger, special issue of MRS Bull 23, No. 2 (1998).
    • Semiconductor Quantum Dots, edited by Alex Zunger, special issue of MRS Bull 23, No. 2 (1998).
  • 20
    • 85038274117 scopus 로고    scopus 로고
    • (unpublished);
    • W. Yang, H. Lee, and P. C. Sercel (unpublished);H. Lee, W. Yang, R. Lowe-Webb, and P. C. Sercel (unpublished); P. C. Sercel (private communication).
    • Yang, W.1    Lee, H.2    Sercel, P.C.3
  • 47
    • 85038271190 scopus 로고    scopus 로고
    • Equation (4) is implemented in real space, on a fast Fourier transform grid of the wave function (Formula presented) The (Formula presented) and (Formula presented) reference functions are approximated by (Formula presented) and z times a spherical Bessel function (Formula presented) which has its first node at (Formula presented) The reference functions outside (Formula presented) are set to zero. We have used (Formula presented) a.u for all In, Ga, and As atoms, deduced from the size ranges of the spin-orbit interaction nonlocal pseudopotentials in the local density approximation.
    • Equation (4) is implemented in real space, on a fast Fourier transform grid of the wave function (Formula presented) The (Formula presented) and (Formula presented) reference functions are approximated by (Formula presented) and z times a spherical Bessel function (Formula presented) which has its first node at (Formula presented) The reference functions outside (Formula presented) are set to zero. We have used (Formula presented) a.u for all In, Ga, and As atoms, deduced from the size ranges of the spin-orbit interaction nonlocal pseudopotentials in the local density approximation.
  • 48
    • 0000126213 scopus 로고
    • A smooth energy cutoff (with a smooth cutoff parameter of 0.8) is used in the current calculation, and is defined in L. W. Wang and A. Zunger, Phys. Rev. B 51, 17 398 (1995).
    • (1995) Phys. Rev. B , vol.51 , pp. 17
    • Wang, L.W.1    Zunger, A.2
  • 50
    • 85038298054 scopus 로고    scopus 로고
    • According to Fig. 22, the third electron state in the (Formula presented) dot is above the wetting layer CBM energy. However, as shown in Fig. 44, this state is a normal p-like bound state. This contradiction might result from the finite supercell we used, which has limited wetting layer area, thus pushes the wetting layer CBM energy up. So, in reality, according to Fig. 22, the (Formula presented) quantum dot should have only two bound electron states.
    • According to Fig. 22, the third electron state in the (Formula presented) dot is above the wetting layer CBM energy. However, as shown in Fig. 44, this state is a normal p-like bound state. This contradiction might result from the finite supercell we used, which has limited wetting layer area, thus pushes the wetting layer CBM energy up. So, in reality, according to Fig. 22, the (Formula presented) quantum dot should have only two bound electron states.
  • 51
    • 85038281316 scopus 로고    scopus 로고
    • Consider the VBM-1 state in Figs. 33 and 44. If we lower the isosurface value from 0.25 to 0.1, the two lumps of the green isosurfaces of the (Formula presented) dot in Figs. 33 will be connected to form a doughnut, similar to the isosurface plot of VBM-1 state of the (Formula presented) quantum dot shown in Figs. 44. Similarly, the VBM-2 and VBM-3 states change from the (Formula presented) plots in Fig. 33 to (Formula presented)-like plots in Fig. 44, when the isosurface value changes from 0.25 to 0.1. Thus the wave-function square of the valence state does not have any nodal plane.
    • Consider the VBM-1 state in Figs. 33 and 44. If we lower the isosurface value from 0.25 to 0.1, the two lumps of the green isosurfaces of the (Formula presented) dot in Figs. 33 will be connected to form a doughnut, similar to the isosurface plot of VBM-1 state of the (Formula presented) quantum dot shown in Figs. 44. Similarly, the VBM-2 and VBM-3 states change from the (Formula presented) plots in Fig. 33 to (Formula presented)-like plots in Fig. 44, when the isosurface value changes from 0.25 to 0.1. Thus the wave-function square of the valence state does not have any nodal plane.
  • 54
    • 85038284144 scopus 로고    scopus 로고
    • (unpublished).
    • S.H. Wei (unpublished).
    • Wei, S.H.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.