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Cross sections through the 2D optical pump—THz probe data of equilibrium co...
Published: March 2023
FIG. 4.4 Cross sections through the 2D optical pump—THz probe data of equilibrium conductivity of VO2 with predominant components of (a) P, phonon resonances and (b) E, electronic conductivity ( Kübler et al., 2007 ). More about this image found in Cross sections through the 2D optical pump—THz probe data of equilibrium co...
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(a) Thermal expansion coefficient of monoatomic two-dimensional honeycomb l...
Published: March 2023
FIG. 2.8 (a) Thermal expansion coefficient of monoatomic two-dimensional honeycomb lattices of graphene, silicene, germanene, and phosphorene and (b) strain-dependent phonon frequency of GaSe. Reproduced with permission from Ge et al., Phys. Rev. B 94 , 165433 (2016). Copyright 2016 American Physical Society; and Longuinhos and Ribeiro-Soares, Phys. Rev. Appl. 11 , 024012 (2019). Copyright 2019 American Physical Society. More about this image found in (a) Thermal expansion coefficient of monoatomic two-dimensional honeycomb l...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735425590_002
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... field model in the continuum limit, the model parameters are either scaled as a function of strain or an explicit strain-dependent term is added that will couple to other degrees of freedom, for example. the spin–phonon coupling term. However, in a first principle method, such explicit expressions...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735425590_004
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... is correlated with the strong interactions between electrons and phonons. The electron–phonon interaction in VO2 was also emphasized and led to a softening tendency of a zone-boundary phonon mode at the reciprocal lattice point R in the metallic phase as the temperature decreased. In the rutile...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
0
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... , C. , and Schlenker , M. , Symmetry and Physical Properties of Crystals ( Springer , 2014 ). Mannepalli , V. R. , Raghunathan , R. , Ramadurai , R. , David , A. , and Prellier , W. , “ Local structural distortion and interrelated phonon mode studies in yttrium...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
0
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... of the electron gas by a stochastic method ,” Phys. Rev. Lett.   45 , 566 – 569 ( 1980 ). 10.1103/PhysRevLett.45.566 Chanana , A. and Waghmare , U. V. , “ Prediction of coupled electronic and phononic ferroelectricity in strained 2D h-NbN: First-principles theoretical analysis ,” Phys. Rev...
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Overview of low field mobility. (a) The conventional unit cell of β-Ga<sub></sub>...
Published: February 2023
FIG. 7.1 Overview of low field mobility. (a) The conventional unit cell of β-Ga2O3 with the Cartesian direction convention followed in this chapter. Reproduced with permission from Ghosh and Singisetti, J. Appl. Phys. 122 , 035702 (2017a). Copyright 2017a AIP Publishing LLC. (b) The calculated scattering strength of different POP phonon modes for three different electron energies. Reproduced with permission from Ghosh and Singisetti, Appl. Phys. Lett. 109 , 072102 (2016). (c) Dependence of electron mobility with temperature and comparison with experimentally measured Hall mobility. Reproduced with permission from Ghosh and Singisetti, Appl. Phys. Lett. 109 , 072102 (2016). Copyright 2016 AIP Publishing LLC. (d) Dependence of electron mobility on electron concentration for two different directions. Triangles indicate phonon only scattering limited mobility, while circles represent the mobility including both phonon and impurity scatterings. Reproduced with permission from Ghosh and Singisetti, J. Mater. Res. 32 , 4142–4152 (2017b). Copyright 2016 Springer Nature. More about this image found in Overview of low field mobility. (a) The conventional unit cell of β-Ga...
Book
Book Cover Image
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735425590
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735425590_001
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... in YBiCO varies from 14.08° to 13.93° and 12.27° to 12.58°, respectively, with composition, which is an indicator of distortion along the [101] axis and [010] axis. Such local distortions introduced due to the chemical substitution could be evidently observed in the phonon studies of such compounds. FIG...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735425590_003
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
...) exerted on them ( Long, 1956 ). The fourth origin of the strain, which is primarily intrinsic in nature, is the phonon-induced lattice vibration. Optical phonons ought to give rise to “internal strain.” The interaction between optical phonons and electrons is strongly influenced by the perturbation...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
0
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... ( 2013 ). 10.1063/1.4803551 Budai , J. D. , Hong , J. , Manley , M. E.   et al. , “ Metallization of vanadium dioxide driven by large phonon entropy ,” Nature   515 , 535 – 539 ( 2014 ). 10.1038/nature13865 Cao , J. , Ertekin , E. , Srinivasan , V.   et al...
Book Chapter
Series: AIPP Books, Principles
Published: February 2023
10.1063/9780735425033_007
EISBN: 978-0-7354-2503-3
ISBN: 978-0-7354-2500-2
... of multiple polar optical phonon modes limits the mobility around 200 cm2V−1s−1 at room temperature. The negative differential conductivity under high field condition is observed despite satellite valleys being remote. Impact ionization rates are calculated under very high...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
0
EISBN: 978-0-7354-2559-0
ISBN: 978-0-7354-2556-9
... phonon interactions ,” in Fundamentals of Semiconductors ( Springer , 1996 ), pp. 107 – 158 . Zhang , Y. , Rodriguez , M. , and Maksimović , D. , “ High-frequency integrated gate drivers for half-bridge GaN power stage ,” in IEEE 15th Workshop on Control and Modeling for Power...
Book Chapter
Series: AIPP Books, Principles
Published: February 2023
0
EISBN: 978-0-7354-2503-3
ISBN: 978-0-7354-2500-2
...References References Atlas User's Manual , “ Version Version 5.10.0.R ” ( SILVACO International , 2016 ), 798 pp. Ghosh , K. and Singisetti , U. , “ Ab initio calculation of electron-phonon coupling in monoclinic β-Ga2O3 crystal ,” Appl. Phys. Lett.   109...
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Feynman diagrams show for the electron-electron interaction mediated via ph...
Published: December 2022
FIG. 4.17 Feynman diagrams show for the electron-electron interaction mediated via phonons. The left panel shows electron 1 emits a phonon, which is captured by electron 2 later. The right panel shows electron 2 emits a phonon which is captured by electron 1 later. More about this image found in Feynman diagrams show for the electron-electron interaction mediated via ph...
Book Chapter
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735424395_007
EISBN: 978-0-7354-2439-5
ISBN: 978-0-7354-2436-4
... the mQm product. This is achieved with the help of a heavy test mass when the mechanical oscillator has a low Qm. Alternatively, high Qm in phononic crystals ( Meenehan et al., 2014 ) and toroids placed on pins ( Schliesser et al., 2008 ) allow...
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Plot showing spin wave excitation. Each spin is slightly rotated with respe...
Published: December 2022
FIG. 1.6 Plot showing spin wave excitation. Each spin is slightly rotated with respect to its neighbor. A complete cycle of the rotation is shown. These spin wave excitations are called “magnons“ (analogous to phonons denoting lattice excitations). More about this image found in Plot showing spin wave excitation. Each spin is slightly rotated with respe...
Book
Book Cover Image
Series: AIPP Books, Principles
Published: March 2023
10.1063/9780735424395
EISBN: 978-0-7354-2439-5
ISBN: 978-0-7354-2436-4
Images
(a) Layer-dependent Raman shift in WSe<sub>2</sub>, (b) computational phono...
Published: December 2022
FIG. 3.6 (a) Layer-dependent Raman shift in WSe2, (b) computational phonon spectrum of bulk Wse2, and (c) atomic displacements for optical modes between 100 and 250 cm−1. Computational phonon dispersion spectrum for (d) bilayer and (e) single-layer WSe2 structure and (f) atomic displacements for the optical phonon modes of single-layer WSe2. Reprinted with permission from H. Sahin et al., Phys. Rev. B 87 , 165409 (2013). Copyright 2013 American Physical Society. More about this image found in (a) Layer-dependent Raman shift in WSe2, (b) computational phono...
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(a) Layer-dependent Raman shift in WSe<sub>2</sub>, (b) computational phono...
Published: December 2022
FIG. 3.6 (a) Layer-dependent Raman shift in WSe2, (b) computational phonon spectrum of bulk Wse2, and (c) atomic displacements for optical modes between 100 and 250 cm−1. Computational phonon dispersion spectrum for (d) bilayer and (e) single-layer WSe2 structure and (f) atomic displacements for the optical phonon modes of single-layer WSe2. Reprinted with permission from H. Sahin et al., Phys. Rev. B 87 , 165409 (2013). Copyright 2013 American Physical Society. More about this image found in (a) Layer-dependent Raman shift in WSe2, (b) computational phono...