Carrier temperature of low-dimensional electron systems estimated by photoluminescence and photoluminescence-excitation spectra

1
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07 3/18 _at_ ???????

• Carrier temperature of low-dimensional electron
  systems estimated by photoluminescence and
  photoluminescence-excitation spectra
• ??????CREST(JST)?????????
• ???????????????Loren N. Pfeiffer?Ken W. West

Outline
? ???? ???????????? ? ???? ?????PL?PLE???
PL?PLE????????? ? ?????
2
?????????
????????????
? ??????????????????????????????
BCS BEC FES BGR Screening filling Fermi
liquid T-L liquid
????????-???? ? ????????????
????????????????????
?????????????? ????????
???????????????
C. H. Yang, Jean M. Carlson-Swindle, S. A. Lyon,
and J. M. Worlock, Phys. Rev. Lett. 55, 2359
(1985). K. Hirakawa, M. Grayson, D. C. Tsui, and
Ç. Kurdak, Phys. Rev. B 47, 16651 (1993). S.
Komiyama and Y. Kawaguchi, T. Osada and Y.
Shiraki, Phys. Rev. Lett. 77, 558 (1996).
3
?????????2???????????????
????????
? ?????? ???????? 1
? ??????????????????? 2
1 Jagdeep Shah and A. Pinczuk, H. L. Störmer,
A. C. Gossard, and W. Wiegmann, App. Phys. Lett.
44, 322 (1984). 2 R. Kuchler, G. Abstreiter, G.
Bohm, and G. Weimann, Semicond. Sci. Technol. 8,
88 (1993).
??????? ????????
????????
???
??????????
4
?????????????
? ???????? ???????
??????2?????????????????
by ????(??)
??-????????!
5
????????????
n?????????????????PL(??)?PLE(????)????????
Si????11011 cm-2
??? ?????????1??? ??? ?????????(P1)????
??????(P2)?????? ??? ??????????????(I)?
??????????????
??? 6.3 nm 2DEG?? (VDP???) 61010 cm-2
3?????????????PL?PLE?????????
6
?????PLE?? ??????????????????
????????????????PLE??????????????
??????????

1. PL??????????????? ??????
2. PLE??????????????????

???????????? ???????????????
7
PL?PLE???????
12000mW????????????PL?PLE???????
PL
????????????? ???????????
10mW?????PL???????
PLE
50mW?????????????????
10mW?????PLE ???????
? 1mW???PLPLE??S/N???????????
8
PL?PLE????????
????10mW ????5K
?????????
??????????
????????????
7.00.5K
9
?? ???????????PL???????
???? ? 400mW???PL?????????? ????? ?
100mW???PL??????????
???? (2mW)
4meV ?? (2mW)
(7.5K1K)
?? ??? ?????
?? ???
10
?????????????

• ??????????5200K????????????????
• ???????(550K)?10???
• ???????????????????????????????

11
??????????
2DEG??????????????? 1-3
1 Jagdeep Shah and A. Pinczuk, H. L. Störmer,
A. C. Gossard, and W. Wiegmann, App. Phys. Lett.
44, 322 (1984). 2 C. H. Yang, Jean M.
Carlson-Swindle, S. A. Lyon, and J. M. Worlock,
Phys. Rev. Lett. 55, 2359 (1985). 3 R. Kuchler,
G. Abstreiter, G. Bohm, and G. Weimann, Semicond.
Sci. Technol. 8, 88 (1993).
???????????????????I?exp(-hv/kT)??????????????
??????????????PLE???????? ????????????????????
??????????????????????????????????????????????????
???????????????????
8nm 6 InGaAs/GaAs non-dope multi QWs
(20) Eexciton 1.471 eV _at_4K
??????????????????? 4
4 S. Chatterjee, C. Ell, S. Mosor, G. Khitrova,
and H. M. Gibbs, W. Hoyer, M. Kira, S. W. Koch,
J. P. Prineas, and H. Stolz, Phys. Rev. Lett. 92,
067402 (2004).
????????KMS????????????????????????????????????(
13.2meV??????????)????????????????????????????????
?KMS??????????????????????
12
???
?????????????????????PL?PLE????????????? ????????
????????????????????????????? ??????????????????
?????? ????????????7.00.5K?????????? ???????????
??????????????? ???????????????????? ????????(55
0K)?10?????? ?????????????????????????