Phonon scattering against point defects in the quantal 2D Wigner crystal

2001 ◽  
Vol 117 (9) ◽  
pp. 561-564
Author(s):  
M. Polini ◽  
G. Sica ◽  
M.P. Tosi
Keyword(s):  
Point Defects ◽  
Phonon Scattering ◽  
Wigner Crystal

Energetics of point defects in the two-dimensional Wigner crystal

1991 ◽  
Vol 43 (1) ◽  
pp. 623-629 ◽  
Author(s):  
Eric Cockayne ◽  
Veit Elser
Keyword(s):  
Point Defects ◽  
Wigner Crystal ◽  
Two Dimensional

Vacancy Phonon Scattering and Thermoelectric Properties in In2Te3–SnTe Compounds

2010 ◽  
Vol 650 ◽  
pp. 126-131 ◽  
Author(s):  
Hong Fu ◽  
Peng Zhan Ying ◽  
J.L. Cui ◽  
Y.M. Yan ◽  
X.J. Zhang
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Point Defects ◽  
Figure Of Merit ◽  
Lattice Thermal Conductivity ◽  
Phonon Scattering ◽  
Chemical Compositions ◽  
Thermoelectric Figure ◽  
Solid Solution Formation ◽  
Solution Formation

Solid solution formation is a common and effective way to reduce the lattice thermal conductivity for thermoelectric materials because of additional phonon scattering by point defects and grain boundaries. In the present work we prepared In2Te3–SnTe compounds using a mild solidification technique and evaluated their thermoelectric properties in the temperature range from 318705 K. Measurements reveal that the transport properties are strongly dependent on the chemical composition  In2Te3 content, and lattice thermal conductivity significantly reduces above a minimum In2Te3 concentration, which can possibly be explained by an introduction of the vacancy on the indium sublattice and periodical vacancy planes. The highest thermoelectric figure of merit ZT of 0.19 can be achieved at 705 K, and a big improvement of In2Te3 based alloys would be expected if a proper optimization to the chemical compositions and structures were made.

Phonon Scattering by Point Defects in CaF2, SrF2, and BaF2

1970 ◽  
Vol 1 (2) ◽  
pp. 882-890 ◽  
Author(s):  
James A. Harrington ◽  
Charles T. Walker
Keyword(s):  
Point Defects ◽  
Phonon Scattering

scholarly journals Quantum diffusion

Open Physics ◽  
2004 ◽  
Vol 2 (3) ◽  
Author(s):  
Dimitar Pushkarov
Keyword(s):  
Point Defects ◽  
Phonon Scattering ◽  
Solid Helium ◽  
Interpolation Formula ◽  
Quantum Diffusion ◽  
Dispersion Law ◽  
New Type ◽  
Points Of View ◽  
Quantum Crystals ◽  
Basic Ideas

AbstractBasic ideas and results which characterize quantum diffusion of defects in quantum crystals like solid helium as a new phenomenon are presented. Quantum effects in such media lead to a delocalization of point defects (vacancies, impurities etc.) and they turn into quasiparticles of a new type—defectons, which are characterized not by their position in the crystal lattice but by their quasimomentum and dispersion law. Defecton-defecton and defecton-phonon scattering are considered and an interpolation formula for the diffusion coefficient valid in all interesting temperature and concentration regions is presented. A comparison with the experimental data is made. Some alternative points of view are discussed in detail and the inconsistency of the Kisvarsanyi-Sullivan theory is shown.

Phonon Scattering by Point Defects

1963 ◽  
Vol 131 (4) ◽  
pp. 1433-1442 ◽  
Author(s):  
C. T. Walker ◽  
R. O. Pohl
Keyword(s):  
Point Defects ◽  
Phonon Scattering

scholarly journals Combined treatment of phonon scattering by electrons and point defects explains the thermal conductivity reduction in highly-doped Si

2020 ◽  
Vol 8 (3) ◽  
pp. 1273-1278 ◽  
Author(s):  
Bonny Dongre ◽  
Jesús Carrete ◽  
Shihao Wen ◽  
Jinlong Ma ◽  
Wu Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Point Defects ◽  
Phonon Scattering ◽  
Combined Treatment ◽  
Successful Prediction

Successful prediction of thermal conductivity of highly-doped Si, revealing the importance of phonon scattering by electrons as well as point defects.

Highly enhanced thermoelectric properties of nanostructured Bi2S3 bulk materials via carrier modification and multi-scale phonon scattering

2019 ◽  
Vol 6 (6) ◽  
pp. 1374-1381 ◽  
Author(s):  
Yi Wu ◽  
Qing Lou ◽  
Yang Qiu ◽  
Jun Guo ◽  
Zhi-Yuan Mei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Grain Boundaries ◽  
Thermoelectric Properties ◽  
Point Defects ◽  
Lattice Thermal Conductivity ◽  
Phonon Scattering ◽  
Bulk Materials ◽  
Multi Scale ◽  
Multiscale Structure ◽  
Strong Scattering

Low lattice thermal conductivity for LaCl3-doped samples is obtained via a multiscale structure and strong scattering by point defects, dislocations and grain boundaries.

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