Direct Detection of Hole Gas in Ge-Si Core-Shell Nanowires by Enhanced Raman Scattering

被引：30
|
作者：
Zhang, Shixiong [1 ]
Lopez, Francisco J. [1 ]
Hyun, Jerome K. [1 ]
Lauhon, Lincoln J. [1 ]
机构：
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源：
NANO LETTERS | 2010年 / 10卷 / 11期
关键词：
Nanowire; heterostructure; Raman scattering; Fano resonance; SEMICONDUCTOR NANOWIRES; HETEROSTRUCTURES; IMPURITIES; STRAIN; GROWTH;
D O I：
10.1021/nl102316b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report the direct detection of hole accumulation in the core of Ge-Si core-shell nanowire heterostructures by a Fano resonance between free holes and the F-2g mode in Raman spectra. Raman enhancements of 10- 10 000 with respect to bulk were observed and explained using finite difference time domain simulations of the electric fields concentrated in the nanowire. Numerical modeling of the radial carrier concentration revealed that the asymmetric line-shape is strongly influenced by inhomogeneous broadening.
引用
收藏
页码：4483 / 4487
页数：5
相关论文
共 50 条
  • [21] Tailoring Thermal Conductivity of Ge/Si Core-Shell Nanowires
    Sarikurt, Sevil
    Sevik, Cem
    Kinaci, Alper
    Haskins, Justin B.
    Cagin, Tahir
    Proceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems (MEMA 2015), 2015, : 433 - 440
  • [22] Resonant Raman scattering of core-shell GaN/AlN nanowires
    Cros, A.
    Cristobal, A. Garcia
    Hestroffer, K.
    Daudin, B.
    Wang, J.
    Demangeot, F.
    Pechou, R.
    NANOTECHNOLOGY, 2021, 32 (08)
  • [23] Role of Confinement on Carrier Transport in Ge-SixGe1-x Core-Shell Nanowires
    Nah, Junghyo
    Dillen, David C.
    Varahramyan, Kamran M.
    Banerjee, Sanjay K.
    Tutuc, Emanuel
    NANO LETTERS, 2012, 12 (01) : 108 - 112
  • [24] Interfacial intermixing of Ge/Si core-shell nanowires by thermal annealing
    Zhang, Xiaolong
    Jevasuwan, Wipakorn
    Fukata, Naoki
    NANOSCALE, 2020, 12 (14) : 7572 - 7576
  • [25] Si-SiC core-shell nanowires
    Ollivier, M.
    Latu-Romain, L.
    Martin, M.
    David, S.
    Mantoux, A.
    Bano, E.
    Souliere, V.
    Ferro, G.
    Baron, T.
    JOURNAL OF CRYSTAL GROWTH, 2013, 363 : 158 - 163
  • [26] Significant Reduction of Thermal Conductivity in Si/Ge Core-Shell Nanowires
    Hu, Ming
    Giapis, Konstantinos P.
    Goicochea, Javier V.
    Zhang, Xiaoliang
    Poulikakos, Dimos
    NANO LETTERS, 2011, 11 (02) : 618 - 623
  • [27] Shell morphology and Raman spectra of epitaxial Ge-SixGe1-x and Si-SixGe1-x core-shell nanowires
    Wen, Feng
    Dillen, David C.
    Kim, Kyounghwan
    Tutuc, Emanuel
    JOURNAL OF APPLIED PHYSICS, 2017, 121 (23)
  • [28] Resonant and polarized Raman scattering from single CdS/CdSe core-shell nanowires
    Kim, J. H.
    Kim, H.
    Rho, H.
    Choi, Y-J
    Park, J-G
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2014, 47 (13)
  • [29] Hole mobility in Ge/Si core/shell nanowires: What could be the optimum?
    Li, Jing
    Jomaa, Narjes
    Niquet, Yann-Michel
    Said, Moncef
    Delerue, Christophe
    APPLIED PHYSICS LETTERS, 2014, 105 (23)
  • [30] Lattice Vibrational Properties of Si/Ge Core-Shell Nanowires for Thermoelectric Applications
    Bohorquez-Ballen, Jaime
    Sirikumara, Hansika I.
    Ahmed, Shaikh
    Jayasekera, Thushari
    18TH INTERNATIONAL WORKSHOP ON COMPUTATIONAL ELECTRONICS (IWCE 2015), 2015,
12345