Role of one-dimensional defects in the electrical transport through Si(111)−7×7 surface states

2019 ◽  
Vol 99 (12) ◽  
Author(s):  
Masayuki Hamada ◽  
Yukio Hasegawa
Keyword(s):  
Electrical Transport ◽  
Surface States ◽  
One Dimensional

Electrical Transport in Mesoporous Silicon Layers

1994 ◽  
Vol 358 ◽  
Author(s):  
M. Ben-Chorin ◽  
S. Grebner ◽  
F. Wang ◽  
R. Schwarz ◽  
A. Nikolov ◽  
...  
Keyword(s):  
Electrical Transport ◽  
Surface States ◽  
Dark Conductivity ◽  
Free Standing ◽  
Electron Conduction ◽  
Mesoporous Silicon ◽  
Methanol Vapor ◽  
Quantum Confinement Effects ◽  
P Type

ABSTRACTIn order to clarify the role of the enlarged surface area of porous silicon on the electrical conductivity, we have studied the transport in mesoporous silicon layers, for which quantum confinement effects are negligible. We prepare free standing mesoporous films, from highly doped p-type Si wafers. The dark conductivity of the mesoporous layers is activated with an energy of 0.5 eV. Thermopower measurements show negative sign indicating electron conduction. The exposure of these layers to methanol vapor results in an increased conductivity and change of the thermopower magnitude. Photoconductivity measurements and the Steady-State Photocarrier Grating technique (SSPG) are used to evaluate the density of the surface states and the dynamics of the photo-excited carriers. All these results indicate that a large density of surface states exist, which results in a depletion of the free holes.

Electrical transport in InAs/GaSb superlattice: role of surface states and interface roughness

2012 ◽  
Vol 27 (10) ◽  
pp. 105025 ◽  
Author(s):  
T V Chandrasekhar Rao ◽  
Selvakumar V Nair ◽  
Harry E Ruda ◽  
J Antoszewski ◽  
J B Rodriguez ◽  
...  
Keyword(s):  
Electrical Transport ◽  
Surface States ◽  
Interface Roughness

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

scholarly journals Vortex states in an acoustic Weyl crystal with a topological lattice defect

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Wang ◽  
Yong Ge ◽  
Hong-xiang Sun ◽  
Haoran Xue ◽  
Ding Jia ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Lattice Defect ◽  
Three Dimensional ◽  
Surface States ◽  
Real Space ◽  
Lattice Defects ◽  
One Dimensional ◽  
Topological Features ◽  
Topological Lattice

AbstractCrystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space.

Role of the Dimerized Gap Due to Anion Ordering in the Quantized Hall Phases of Quasi-One Dimensional Organic Conductors

2007 ◽  
Vol 142 (3-4) ◽  
pp. 477-480
Author(s):  
Noriaki Matsunaga ◽  
Katutosi Hino ◽  
Takamichi Ohta ◽  
Katsumi Yamashita ◽  
Kazushige Nomura ◽  
...  
Keyword(s):  
Organic Conductors ◽  
One Dimensional

Surface states of a deformed one-dimensional crystal

Physica ◽  
1966 ◽  
Vol 32 (7) ◽  
pp. 1274-1282 ◽  
Author(s):  
Maria Stȩślicka ◽  
K.F. Wojciechowski
Keyword(s):  
Surface States ◽  
One Dimensional ◽  
Dimensional Crystal

Role of One-Dimensional Ribbonlike Nanostructures in Dye-Sensitized TiO2-Based Solar Cells

2011 ◽  
Vol 115 (14) ◽  
pp. 7104-7113 ◽  
Author(s):  
Jiazang Chen ◽  
Bo Li ◽  
Jianfeng Zheng ◽  
Suping Jia ◽  
Jianghong Zhao ◽  
...  
Keyword(s):  
Solar Cells ◽  
One Dimensional ◽  
Dye Sensitized
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