Quantum Hall droplet at excitonic filling factor ν=2 in a self-assembled quantum dot -: art. no. 035326

被引：2

作者：

Cheng, SJ ^{[1
]}

Hawrylak, P

机构：

[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan

[2] CNR, Inst Microstruct Sci, Ottawa, ON, Canada

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.73.035326

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a theory of excitonic quantum Hall droplet (EXQHD) at filling factor nu=2 in a self-assembled quantum dot (SAD) subject to strong perpendicular magnetic field B. Using exact diagonalization technique we determine the ground and excited states, the stability against spin flips, and the optical emission spectrum of the nu=2 EXQHDs. In contrast with one-component electronic droplets, the singlet-singlet nu=2 EXQHD is found to be intrinsically correlated, and stable even in high magnetic fields due to the neutrality of exciton. The characteristic spin related emission spectrum and its magnetic field evolution from the EXQHD are predicted.

引用

页数：9

共 48 条

[1] N-ELECTRON GROUND-STATE ENERGIES OF A QUANTUM-DOT IN MAGNETIC-FIELD [J].

ASHOORI, RC ;

STORMER, HL ;

WEINER, JS ;

PFEIFFER, LN ;

BALDWIN, KW ;

WEST, KW .

PHYSICAL REVIEW LETTERS, 1993, 71 (04) :613-616

[2] Ellipsoidal deformation of vertical quantum dots [J].

Austing, DG ;

Sasaki, S ;

Tarucha, S ;

Reimann, SM ;

Koskinen, M ;

Manninen, M .

PHYSICAL REVIEW B, 1999, 60 (16) :11514-11523

[3] Single-dot spectroscopy in high magnetic fields [J].

Babinski, A ;

Awirothananon, S ;

Lapointe, J ;

Wasilewski, Z ;

Raymond, S ;

Potemski, M .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2005, 26 (1-4) :190-193

[4] Fine structure of neutral and charged excitons in self-assembled In(Ga)As/(Al)GaAs quantum dots -: art. no. 195315 [J].

Bayer, M ;

Ortner, G ;

Stern, O ;

Kuther, A ;

Gorbunov, AA ;

Forchel, A ;

Hawrylak, P ;

Fafard, S ;

Hinzer, K ;

Reinecke, TL ;

Walck, SN ;

Reithmaier, JP ;

Klopf, F ;

Schäfer, F .

PHYSICAL REVIEW B, 2002, 65 (19) :1953151-19531523

[5] Hidden symmetries in the energy levels of excitonic 'artificial atoms' [J].

Bayer, M ;

Stern, O ;

Hawrylak, P ;

Fafard, S ;

Forchel, A .

NATURE, 2000, 405 (6789) :923-926

[6] EXCITONS AND DEEXCITONS IN A NEUTRAL 2-DIMENSIONAL MAGNETOPLASMA WITH A STRONG POPULATION-INVERSION [J].

BYCHKOV, YA ;

RASHBA, EI .

PHYSICAL REVIEW B, 1991, 44 (12) :6212-6219

[7] Theory of excitonic artificial atoms: InGaAs/GaAs quantum dots in strong magnetic fields [J].

Cheng, SJ ;

Sheng, WD ;

Hawrylak, P .

PHYSICAL REVIEW B, 2003, 68 (23)

[8] Collapse of the spin-singlet phase in quantum dots [J].

Ciorga, M ;

Wensauer, A ;

Pioro-Ladriere, M ;

Korkusinski, M ;

Kyriakidis, J ;

Sachrajda, AS ;

Hawrylak, P .

PHYSICAL REVIEW LETTERS, 2002, 88 (25) :4

[9] Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy [J].

Ciorga, M ;

Sachrajda, AS ;

Hawrylak, P ;

Gould, C ;

Zawadzki, P ;

Jullian, S ;

Feng, Y ;

Wasilewski, Z .

PHYSICAL REVIEW B, 2000, 61 (24) :16315-16318

[10]

Darwin CG, 1931, P CAMB PHILOS SOC, V27, P86

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