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1
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B. G. Levi, Phys. Today 49(6), 22 (1996).
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Levi, B.G.1
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4
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0030716879
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and other quantum dot articles in the same issue.
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P. L. McEuen, Science 278, 1729 (1997);and other quantum dot articles in the same issue.
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Science
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McEuen, P.L.1
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5
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85038325626
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Semiconductor Quantum Dots, edited by Alex Zunger, special issue of MRS Bull 23, No. 2 (1998).
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Semiconductor Quantum Dots, edited by Alex Zunger, special issue of MRS Bull 23, No. 2 (1998).
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6
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A. Forchel, R. Steffen, T. Koch, M. Michel, M. Albrecht, and T. L. Reinecke, Semicond. Sci. Technol. 11, 1529 (1996).
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Forchel, A.1
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7
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M. Fricke, A. Lorke, J. P. Kotthaus, G. Medeiros-Ribeiro, and P. M. Petroff, Europhys. Lett. 36, 197 (1996).
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Fricke, M.1
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Petroff, P.M.5
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8
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0031360386
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R. J. Warburton, C. S. Durr, K. Karrai, J. P. Kotthaus, G. Medeiros-Ribeiro, and P. M. Petroff, Phys. Rev. Lett. 79, 5282 (1997).
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Phys. Rev. Lett.
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Warburton, R.J.1
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Petroff, P.M.6
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9
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0032503024
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L. Landin, M. S. Miller, M.-E. Pistol, C. E. Pryor, and L. Samuelson, Science 280, 262 (1998).
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Science
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Landin, L.1
Miller, M.S.2
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Samuelson, L.4
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10
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0000190910
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E. Dekel, D. Gershoni, E. Ehrenfreund, D. Spektor, J. M. Garcia, and P. M. Petroff, Phys. Rev. Lett. 80, 4991 (1998).
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Phys. Rev. Lett.
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Dekel, E.1
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13
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0000396772
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A. Wojs, P. Hawrylak, S. Fafard, and L. Jacak, Phys. Rev. B 54, 5604 (1996).
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Wojs, A.1
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20
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85038274117
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(unpublished);
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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).
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Yang, W.1
Lee, H.2
Sercel, P.C.3
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0001455299
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O. I. Micic, H. M. Cheong, H. Fu, A. Zunger, J. R. Sprague, A. Mascarenhas, and A. J. Nozik, J. Phys. Chem. B 101, 4904 (1997).
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Micic, O.I.1
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Fu, H.3
Zunger, A.4
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Mascarenhas, A.6
Nozik, A.J.7
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35
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0001429563
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S. Ruvimov, P. Werner, K. Scheerschmidt, U. Gösele, J. Heydenreich, U. Richter, N. N. Ledentsov, M. Grundmann, D. Bimberg, V. M. Ustinov, and A. Yu. Egorov, Phys. Rev. B 51, 14 766 (1995).
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Phys. Rev. B
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Ruvimov, S.1
Werner, P.2
Scheerschmidt, K.3
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Richter, U.6
Ledentsov, N.N.7
Grundmann, M.8
Bimberg, D.9
Ustinov, V.M.10
Yu. Egorov, A.11
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Appl. Phys. Lett.
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M. Grundmann, J. Christen, N. N. Ledentsov, J. Böhrer, D. Bimberg, S. S. Ruvimov, P. Werner, U. Richter, U. Gösele, J. Heydenreich, V. M. Ustinov, A. Yu. Egorov, A. E. Zhukov, P. S. Kop’ev, and Zh. I. Alferov, Phys. Rev. Lett. 74, 4043 (1995).
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Zhukov, A.E.13
Kop’ev, P.S.14
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42
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0000993122
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C. Pryor, J. Kim, L. W. Wang, A. J. Williamson, and A. Zunger, J. Appl. Phys. 83, 2548 (1998).
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J. Appl. Phys.
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Pryor, C.1
Kim, J.2
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Williamson, A.J.4
Zunger, A.5
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47
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85038271190
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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.
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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.
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48
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0000126213
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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).
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(1995)
Phys. Rev. B
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Wang, L.W.1
Zunger, A.2
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50
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85038298054
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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.
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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.
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51
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85038281316
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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.
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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.
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52
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0000016912
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M. Grundmann, N. N. Ledentsov, O. Stier, J. Bohrer, and D. Bimberg, Phys. Rev. B 53, R10 509 (1996).
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(1996)
Phys. Rev. B
, vol.53
, pp. 10
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Grundmann, M.1
Ledentsov, N.N.2
Stier, O.3
Bohrer, J.4
Bimberg, D.5
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54
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85038284144
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(unpublished).
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S.H. Wei (unpublished).
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Wei, S.H.1
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