PMID- 20672111
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110714
LR  - 20240330
IS  - 1556-276X (Electronic)
IS  - 1931-7573 (Print)
IS  - 1556-276X (Linking)
VI  - 5
IP  - 4
DP  - 2010 Jan 21
TI  - Impacts of coulomb interactions on the magnetic responses of excitonic complexes 
      in single semiconductor nanostructures.
PG  - 680-5
LID - 10.1007/s11671-010-9531-3 [doi]
AB  - We report on the diamagnetic responses of different exciton complexes in single 
      InAs/GaAs self-assembled quantum dots (QDs) and quantum rings (QRs). For QDs, the 
      imbalanced magnetic responses of inter-particle Coulomb interactions play a 
      crucial role in the diamagnetic shifts of excitons (X), biexcitons (XX), and 
      positive trions (X-). For negative trions (X-) in QDs, anomalous magnetic 
      responses are observed, which cannot be described by the conventional quadratic 
      energy shift with the magnetic field. The anomalous behavior is attributed to the 
      apparent change in the electron wave function extent after photon emission due to 
      the strong Coulomb attraction by the hole in its initial state. In QRs, the 
      diamagnetic responses of X and XX also show different behaviors. Unlike QDs, the 
      diamagnetic shift of XX in QRs is considerably larger than that of X. The 
      inherent structural asymmetry combined with the inter-particle Coulomb 
      interactions makes the wave function distribution of XX very different from that 
      of X in QRs. Our results suggest that the phase coherence of XX in QRs may 
      survive from the wave function localization due to the structural asymmetry or 
      imperfections.
FAU - Chang, Wen-Hao
AU  - Chang WH
AD  - Department of Electrophysics, National Chiao Tung University, Hsinchu, 30010, 
      Taiwan. whchang@mail.nctu.edu.tw.
FAU - Lin, Chia-Hsien
AU  - Lin CH
FAU - Fu, Ying-Jhe
AU  - Fu YJ
FAU - Lin, Ta-Chun
AU  - Lin TC
FAU - Lin, Hsuan
AU  - Lin H
FAU - Cheng, Shuen-Jen
AU  - Cheng SJ
FAU - Lin, Sheng-Di
AU  - Lin SD
FAU - Lee, Chien-Ping
AU  - Lee CP
LA  - eng
PT  - Journal Article
DEP - 20100121
PL  - United States
TA  - Nanoscale Res Lett
JT  - Nanoscale research letters
JID - 101279750
PMC - PMC2894115
OTO - NOTNLM
OT  - Diamagnetic shift
OT  - Magnetophotoluminescence
OT  - Quantum dots
OT  - Quantum rings
EDAT- 2010/07/31 06:00
MHDA- 2010/07/31 06:01
PMCR- 2010/01/21
CRDT- 2010/07/31 06:00
PHST- 2009/11/27 00:00 [received]
PHST- 2010/01/05 00:00 [accepted]
PHST- 2010/07/31 06:00 [entrez]
PHST- 2010/07/31 06:00 [pubmed]
PHST- 2010/07/31 06:01 [medline]
PHST- 2010/01/21 00:00 [pmc-release]
AID - 1556-276X-5-680 [pii]
AID - 10.1007/s11671-010-9531-3 [doi]
PST - epublish
SO  - Nanoscale Res Lett. 2010 Jan 21;5(4):680-5. doi: 10.1007/s11671-010-9531-3.