Excited states of the two-dimensionalD−center in magnetic fields

Charged Magnetoexcitons in Two Dimensions: Isolated X? and Many-Electron Effects

“…In principle, both bound-tobound and photoionizing bound-tocontinuum transitions are possible in B. This is in contrast to the 2D negative donor ion D À , for which all internal transitions are bound-to-bound, and there are no allowed photoionizing transitions in strong magnetic fields [27,28]. In the s þ (s À ) polarization the inter-LL e-CR-like Dn e ¼ 1 (h-CR-like Dn h ¼ 1) transitions are strong and gain strength with B (Fig.…”

“…The latter has been extensively studied in 2D systems in B (see, e.g. [26][27][28][29][30], and references therein). In the case of X À , there are some fundamental differences in the basic physics, which derive from the free motion of the complex.…”

Heterointerface effects on the charging energy of the shallowD−ground state in silicon: Role of dielectric mismatch

“…19,22 Motivated by the significant changes in the ground state energy produced by nearby interfaces, we explore the possibility of having a bound excited state in a doublecharged single donor. Like helium, we expect the D − first excited state to consist of promoting one 1s electron to the 2s orbital.…”

Investigation of D– centers confined by spherical quantum dots

“…On the other hand, impurities in semiconductors influence both transport and optical properties so that topics like confined D -centers in low-dimensional space have been extensively investigated. Since the existence of the D -centers in center-doped GaAs/Al x Ga 1-x As multiple quantum wells (QWs) was first reported by Huant et al [3] in 1990, the D -centers in semiconductor nanostructures have been investigated from the experimental [4][5][6] and theoretical [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] points of view.…”