Band bending at heterovalent interfaces: Hard X-ray photoelectron spectroscopy of GaP/Si(0 0 1) heterostructures
Band bending at heterovalent interfaces: Hard X-ray photoelectron spectroscopy of GaP/Si(0 0 1) heterostructures
复制标题
异价界面的能带弯曲:GaP/Si(0 0 1)异质结构的硬X射线光电子能谱
DOI:
10.1016/j.apsusc.2021.150514
复制
发表时间:
2021
影响因子:
6.7
通讯作者:
O. Romanyuk
中科院分区:
文献类型:
--
作者:
O. Romanyuk
GaP is a preferred candidate for the transition between Si and heterogeneous III-V epilayers as it is nearly lattice-matched to Si. Here, we scrutinize the atomic structure and electronic properties of GaP/Si (0 0 1) heterointerfaces utilizing hard X-ray photoelectron spectroscopy (HAXPES). GaP (0 0 1) epitaxial films with thicknesses between 4 and 50 nm are prepared by metalorganic vapor phase epitaxy on either predominantly single-domain (SD) or two-domain (TD) Si (0 0 1) surfaces. The antiphase domain content in the GaP films is in situ controlled, employing reflection anisotropy spectroscopy. Via the analysis of core level photoelectron intensities, we reveal core level shifts of the P 2p and Si 2p peaks near the interface as well as core level shifts in the Ga 3d peaks near the surface. We suggest an Inter-Diffused Layer (IDL) model of the GaP/Si (0 0 1) interfacial structure with Sisingle bondP bonds at the heterointerface and residual P atoms in the Si substrate. Using a newly developed Parametrized Polynomial Function (PPF) approach, we derive a non-monotonic band bending profile in the heterostructures, correct experimental valence band offsets implying interfacial electronic barriers, and determine valence band discontinuities of Δ E V= 1.1±0.2 eV (SD samples) and Δ E V= 0.8±0.2 eV (TD samples) at GaP/Si (0 0 1) interfaces.
登录
查看更多内容
影响因子:
2.1
作者:
F. Gozzo;C. Coluzza;G. Margaritondo;F. Flores
通讯作者:
F. Flores
DOI:
10.1002/pssb.201700493
发表时间:
2018
期刊:
physica status solidi (b)
影响因子:
--
作者:
S. Brückner;O. Supplie;A. Dobrich;P. Kleinschmidt;T. Hannappel
通讯作者:
T. Hannappel
影响因子:
4
作者:
B. Koiller;A. S. Martins;H. Chacham
通讯作者:
H. Chacham
影响因子:
3.2
作者:
C. Weiland;A. Rumaiz;J. Woicik
通讯作者:
J. Woicik
影响因子:
9.5
作者:
O. Supplie;M. May;C. Höhn;H. Stange;A. Müller;P. Kleinschmidt;S. Brückner;T. Hannappel
通讯作者:
T. Hannappel