References and Discussion 2004.08 Toshiyuki Ihara

References １Akiyama et. al. , Solid State Communications 122 (2002) 169 1D doped T-Wire / density dependence of PL / X,X-,plasma emission / PL weak FES ２Takagiwa et. al. , JPCS 63 (2002) 1587 Theory : 2DEG / density dependence of FES in absorption spectra / X,X-,Continuum ３Laruelle, PRB, 65 (2002) 195303 1D doped LSL / PL at high density / strong FES by Fano resonance ４Laruelle, PRB, 65 (2002) 195302 1D doped LSL / PL and PLE at high density / Moss-Burstein shift / no 1D features ５Kapon, Physica E, 11 (2001) 224 1D doped V-groove / PL, PLE at high density / PL FES (?) / PLE weak FES (?) ６Kaur, phys. Stat. sol. A 178,465 (2000) 2D doped 10nm well / density dependence of PL, PLE / X,X-,continuum / FES ７Yusa, PRB 62 15390 (2000) 2D doped 20nm well / density dependence of PL,photocurrent / X,X- / FES of X ８V. Huard, PRL 84 (1999) 187 2D CdTe doped 10nm well / density dependence of absorption / X,X- / w2-w1=EF+Eb ９Kim, Physica E7 517 (2000) 1D doped v-groove / PL / FES at n=2 10Brown, PRB 54 (1996) R11082 2D doped 5nm well / density dependence of absorption / X,X- but hard to resolve 11Finkelstein, PRL 74 (1995) 976 2D doped 20nm well / density dependence of PL,PLE / X,X-,plasma 12Sekiyama, PRB 51 (1995) 13899 Cu salt / PL / Fermi-liquid or Luttinver-liquid 13G.D Mahan, Phys. Rev. 153 (1967) 882 Theory : 3D Metal / x-ray absorption / power-law divergent in absorption spectra 14Hawrylak, Phys. Rev. B44 (1991) 3821 Theory : 2D electron system / emission, absorption / X, X- / power-law divergent 15Nozieres et al. Phys. Rev. 178 (1969) 1097 Theory : 3D metal / x-ray absorption / reduced FES by Anderson infrared catastrophe 16Combescot, J. Phys. (Paris) 32 (1971) 1097 Theory : 2D electron system / absorption of X, continuum / power-law divergent

Reference Akiyama et. al. , Solid State Communications 122 (2002) 169 Takagiwa et. al. , JPCS 63 (2002) 1587

Reference Laruelle, PRB, 65 (2002) 195303

Reference Kapon, Physica E, 11 (2001) 224

Reference Kaur, phys. Stat. sol. A 178,465 (2000)

Reference Yusa, PRB 62 15390 (2000) V. Huard, PRL 84 (1999) 187

Reference Kim, Physica E7 517 (2000) Brown, PRB 54 (1996) R11082

Reference Finkelstein, PRL 74 (1995) 976

Reference Sekiyama, PRB 51 (1995) 13899

Reference Hawrylak, Phys. Rev. B44 (1991) 3821

abstract 高品質n型ドープ単一T型量子細線 ゲート電圧で電子濃度を変えられる PL・PLE測定の電子濃度依存性 同サンプルで2次元電子系のPL・PLE測定もできる １次元電子系でのFESの特異な変化（フェルミエッジでw1吸収(trion)が消え、弱いw2らしき吸収(exciton?)が残る） ←原因の候補：FESの消滅(1D電子系でフェルミエッジがない)、偏光依存性(ある意味1Dの特徴)など 1Dの方がexciton・trionの減衰が早い・2Dではw1,w2のFESが高電子濃度でも残る。 Trionの吸収ピークが非対称、高エネルギー側のテールがFESのべき発散に対応している。 Trionのbinding energyが1Dの方が大きい 2meV / 1.5meV We measured PL and PLE spectra in an n-type doped T-shaped quantum wire (T-wire) of superior quality, where the electron density (n1D) is tuned by applying gate voltage. We found interesting differences between one-dimensional (1D) and 2D electron systems by comparing the spectral features of 1D quantum wire with that of 2D quantum well which is measured in the same T-wire sample. In the 2D well, we observed the smooth evolution from the trion peak at low n2D to fermi-edge singularity (FES) at high n2D, which is analogous to results reported for 2D well by other groups. In the 1D wire, we observed strong FES of trion peak which disappears at high n1D. In addition, we found rapid decay of exciton peak with n1D, large trion binding energy in the 1D wire, that might be the characteristic features in 1D system.

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