EFFECTS OF DIELECTRIC MISMATCH ON SHALLOW DONORS AND ACCEPTORS IN A SPHERICAL GAAS-GA1X-ALXAS QUANTUM-DOT

被引：19

作者：

DENG, ZY ^{[1
]}

GUO, JK ^{[1
]}

LAI, TR ^{[1
]}

机构：

[1] CHINESE ACAD SCI,SHANGHAI INST CERAM,SHANGHAI 200050,PEOPLES R CHINA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 30期

关键词：

D O I：

10.1088/0953-8984/6/30/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We calculate the effects of dielectric mismatch on shallow donors and acceptors in a spherical GaAs-Al1-xGaxAs quantum dot for both a finite barrier and an infinitely high barrier using the variational approach. The results have shown that the addition of dielectric mismatch enhances impurity binding energies considerably, especially when the radius of the quantum dot is small. The results also showed that the effects of dielectric mismatch on donors are comparable with those on acceptors, and the corresponding effects for an infinitely high barrier are larger than for a finite barrier.

引用

页码：5949 / 5955

页数：7

共 23 条

[1] GAIN AND THE THRESHOLD OF 3-DIMENSIONAL QUANTUM-BOX LASERS [J].

ASADA, M ;

MIYAMOTO, Y ;

SUEMATSU, Y .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1986, 22 (09) :1915-1921

[2] ESTIMATE OF IMAGE-POTENTIAL PERTURBATION ON THE NORMAL INVERSE AND DIRECT PHOTOEMISSION YIELDS [J].

CAPPELLINI, G ;

DELSOLE, R .

SOLID STATE COMMUNICATIONS, 1991, 79 (02) :185-189

[3] HYDROGENIC IMPURITY STATES IN QUANTUM DOTS AND QUANTUM WIRES [J].

CHUU, DS ;

HSIAO, CM ;

MEI, WN .

PHYSICAL REVIEW B, 1992, 46 (07) :3898-3905

[4] OPTICALLY DETECTED CARRIER CONFINEMENT TO ONE AND ZERO DIMENSION IN GAAS QUANTUM-WELL WIRES AND BOXES [J].

CIBERT, J ;

PETROFF, PM ;

DOLAN, GJ ;

PEARTON, SJ ;

GOSSARD, AC ;

ENGLISH, JH .

APPLIED PHYSICS LETTERS, 1986, 49 (19) :1275-1277

[5] EFFECTS OF IMAGE POTENTIAL ON ELECTRONIC AND IMPURITY STATES IN QUANTUM-WELLS [J].

DENG, ZY ;

GU, SW .

PHYSICAL REVIEW B, 1993, 48 (11) :8083-8088

[6] EFFECTS OF THE IMAGE POTENTIAL ON HYDROGENIC IMPURITY BINDING-ENERGIES IN QUANTUM-WELL WIRES [J].

DENG, ZY ;

GU, SW .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1993, 5 (14) :2261-2266

[7] EFFECTS OF IMAGE POTENTIAL ON HYDROGENIC IMPURITY STATES IN QUANTUM-WELL WIRES [J].

DENG, ZY ;

GU, SW .

PHYSICS LETTERS A, 1993, 174 (04) :320-324

[8] EFFECTS OF THE IMAGE POTENTIAL ON ELECTRONIC AND IMPURITY STATES IN A QUANTUM BOX [J].

DENG, ZY ;

YANG, XL ;

GU, SW .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1993, 92 (03) :363-367

[9] QUANTUM SIZE EFFECT IN SEMICONDUCTOR MICROCRYSTALS [J].

EKIMOV, AI ;

EFROS, AL ;

ONUSHCHENKO, AA .

SOLID STATE COMMUNICATIONS, 1985, 56 (11) :921-924

[10] EFFECT OF IMAGE FORCES ON THE BINDING-ENERGIES OF IMPURITY ATOMS IN GA1-XALXAS/GAAS/GA1-XALXAS QUANTUM-WELLS [J].

ELABSY, AM .

PHYSICAL REVIEW B, 1992, 46 (04) :2621-2624

← 1 2 3 →