scholarly journals Multiexciton Generation in IV–VI Nanocrystals: The Role of Carrier Effective Mass, Band Mixing, and Phonon Emission

2013 ◽  
Vol 4 (2) ◽  
pp. 317-322 ◽  
Author(s):  
Gal Zohar ◽  
Roi Baer ◽  
Eran Rabani
Keyword(s):  
Effective Mass ◽  
Phonon Emission ◽  
Carrier Effective Mass ◽  
Band Mixing

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 Laser energy tuning of carrier effective mass and thermopower in epitaxial oxide thin films

2012 ◽  
Vol 100 (16) ◽  
pp. 162106 ◽  
Author(s):  
A. I. Abutaha ◽  
S. R. Sarath Kumar ◽  
H. N. Alshareef
Keyword(s):  
Thin Films ◽  
Effective Mass ◽  
Laser Energy ◽  
Oxide Thin Films ◽  
Carrier Effective Mass ◽  
Epitaxial Oxide ◽  
Energy Tuning

Rationally optimized carrier effective mass and carrier density lead to high average ZT value in n-type PbSe

2021 ◽  
Author(s):  
Yu Xiao ◽  
Wei Liu ◽  
Yang Zhang ◽  
Dongyang Wang ◽  
Haonan Shi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Effective Mass ◽  
Electrical Transport ◽  
Carrier Density ◽  
Electrical Transport Properties ◽  
Carrier Effective Mass ◽  
Thermoelectric Parameters

Among these intricately coupled thermoelectric parameters, the carrier effective mass (m*) and carrier density (n) are two key parameters to determine the electrical transport properties. To enhance the broad-temperature thermoelectric...

scholarly journals From homogeneous matter to finite nuclei: Role of the effective mass

2019 ◽  
Vol 99 (6) ◽  
Author(s):  
Hana Gil ◽  
Panagiota Papakonstantinou ◽  
Chang Ho Hyun ◽  
Yongseok Oh
Keyword(s):  
Effective Mass ◽  
Finite Nuclei

Lattice-Mismatch Strain and Confinement in Nanoscale Si/SiO2 Structures Fabricated Using Thermal Oxidation

MRS Advances ◽  
2019 ◽  
Vol 4 (5-6) ◽  
pp. 351-357 ◽  
Author(s):  
Erin I. Vaughan ◽  
Clay S. Mayberry ◽  
Danhong Huang ◽  
Ashwani K. Sharma
Keyword(s):  
Band Structure ◽  
Effective Mass ◽  
Thermal Oxidation ◽  
Lattice Mismatch ◽  
Hole Transport ◽  
Bandgap Energy ◽  
Transient Time ◽  
Mismatch Strain ◽  
Carrier Effective Mass ◽  
Order Of Magnitude

ABSTRACTThe behavior of electron and hole transport in semiconductor materials is influenced by lattice-mismatch at the interface. It is well known that carrier scattering in a confined region is dramatically reduced. In this work, we studied the effects of coupling both the strain and confinement simultaneously. We report on the fabrication and characterization of nanoscale planar, wall-like, and wire-like Si/SiO2 structures. As the Si nanostructure dimensions were scaled down to the quantum regime by thermal oxidation of the Si, changes to the band structure and carrier effective mass were observed by both optical and electrical techniques. Transient-time response measurements were performed to examine the carrier generation and recombination behavior as a function of scaling. Signal rise times decreased for both carrier types by an order of magnitude as Si dimensions were reduced from 200 to 10 nm, meaning that the carrier velocity is increasing with smaller scale structures. This result is indicative of decreased Si bandgap energy and carrier effective mass. Photoluminescence measurements taken at 50K showed changes in the PL response peak energies, which illustrates changes in the band structure, as the Si/SiO2 dimensions are scaled.

Theoretical search for high-performance thermoelectric donor–acceptor copolymers: the role of super-exchange couplings

2020 ◽  
Vol 8 (41) ◽  
pp. 21852-21861
Author(s):  
Xue Yong ◽  
Gang Wu ◽  
Wen Shi ◽  
Zicong Marvin Wong ◽  
Tianqi Deng ◽  
...  
Keyword(s):  
Effective Mass ◽  
Power Factor ◽  
First Principles ◽  
High Performance ◽  
First Principles Calculations ◽  
Thermoelectric Power Factor ◽  
Hole Effective Mass ◽  
Donor Acceptor ◽  
Weak Electron

First-principles calculations of a series of representing D–A copolymers demonstrated the strong Super-Exchange couplings induce not only small hole effective mass but also weak electron-phonon couplings, and eventually high thermoelectric power factor.

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