n??????????????????? ??????????????

1
n?????????????????????????????????

• ?????M2 ????
• 04 10/10

2
??
???????? Fermi Edge Singularity (FES)
? ????????????????????????????????????????????????
???(??)?
G.D.Mahan, Phys. Rev. 153, 882 (1967)
????FES??? (??????)
FES
????? ??
??????? ??
??????????? ????(?)
??indirect?????????????????????????(??)
3
2??????FES
???????????????????????????? ? n????????????????(T
rionX-)???????FES??????????
Takagiwa, JPCS 63,1587 (2002)
Huard et. Al. Phys. Rev. Lett. 84, 187 (1999)
1????????????????????????????
4
1??????FES
1???????????
indirect?????? ??????? ????????? ??-Luttinger?
?
????????????????????????????
?????1?????????????(??)
??????????????????higher subband????????? (1D
limit???)
????FES??????????????
1D limit????????????
????(??????????) ???(???????????)
???????
5
?????????
MBE????????????????????????????????T?????
(???????1D limit????)
????? ?stem well????Si?????????????????????????w
irearm well?????1??2?????????
?????? ????????????????????????????????????????
?????????????????PLE?S/N????(?)?
?PLE??????????????????????????????????
??????????5K???
6
1D wire?????
Ef6meV
?????
??????????????
Ef2meV
me0.067m0 mh 0.105m0
?????
FE?Trion?????????????????????????????????????
?????
?Trion????????Eb2meV
7
2D arm well???
1D
Ef6meV
2D??Trion??FE??????????(?????????)?
2D
Ef3.5meV
Ef2meV
Eb2meV
Eb1.5meV
8
?????
1?? 2??
?? ?? ?? ??
Trion?FE ???????(???) ???? ?
Indirect??? ??(???) ?? ?
???FES ??(???) ? ?? ?
Trion?Eb 2.0meV ? 1.5meV ?
???? ???????????? ? ???? ?
?????? ???????? ? ???? ?
??????? ????(????) ????
1?????????????????????????????????????????????
9
?????????
????????????1D limit??????PLE?????????????????? ?
Trion?FE???????????? ?FE????????????????????????
?Trion?????????????????????? 2??????????????????
1???????????????????????????????????????? ?????
????? ??????????????????????????????????????????
?????????????????????????????????????????????????
??FES????? ?????????
10
Parallel channel???
parallel channel???(wire-arm????????)????????????
????????
????arm???
????
????
????
Photon Energy (eV)
11
??
Oberli, Physica E 11, 224 (2001)
Kim, Physica E 7, 517 (2000)
Akiyama, Solid State Communication 122, 169
(2002)
Melin, Physical Review B 65, 195302 (2002)
Melin, Physical Review B 65, 195303 (2002)
12
??
Melin, Physical Review Letters 76, 4219 (1995)
Calleja, Physical Review B 51, 4285 (1995)
Finkelstein, Physical Review Letters 74, 976
(1995)
Brown, Physical Review B 54, R11082 (1996)
Yusa, Physical Review B 62, 15390 (2000)
Huard, Physical Review Letters 84, 187 (1999)
Kaur, physica status solidi (a) 178, 465 (2000)
13
??
Fritze, Physical Review B 48, 4960 (1993)
Calleja, Surface Science 263, 346 (1992)
Ogawa, Physical Review Letters 68, 3638 (1992)
Shields, Superlattices and Microstructures 15,
355 (1994)
Yamaguchi, Japanese Journal of Applied Physics
33, L912 (1994)
14
??
Hawrylak, Physical Review B 44, 3821 (1991)
Skolnick, Physical Review Letters 58, 2130 (1987)
Ruckenstein, Physical Review B 35, 7551 (1987)
Hawrylak, Solid State Communication 81, 525
(1992)
Calleja, Solid State Communication 79, 911 (1991)
15
??