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(a) A polyacetylene chain with formula (C<sub>2</sub>H<sub>2</sub>)<sub></sub>...
Published: December 2022
FIG. 3.5 (a) A polyacetylene chain with formula (C2H2)n is shown. (b) The SSH model as a paradigmatic model for Polyacetylene with dimerized hopping. More about this image found in (a) A polyacetylene chain with formula (C2H2)...
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
... be approximated to J = −4t2/U, where t is the hopping parameter and U is the strength of intra-orbital electron repulsion, both of which are sensitive to strain. Thus, by optimizing the strain, it is also possible to modify the energy landscape and stabilize...
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, Perspectives
Published: December 2022
10.1063/9780735422537_003
EISBN: 978-0-7354-2253-7
ISBN: 978-0-7354-2251-3
... binding model, with dimerized hopping, and in 2D, we consider graphene, which has been a hobby horse even for several years before its experimental discovery. The theme is to discuss the interplay of symmetry and the topological properties. Particularly, in 2D, an important highlight in this direction...
Book Chapter
Series: AIPP Books, Principles
Published: February 2023
10.1063/9780735425033_008
EISBN: 978-0-7354-2503-3
ISBN: 978-0-7354-2500-2
.... When a sufficiently high density of defects has been created, the donors in the epitaxial layer are completely compensated and the Fermi level is pinned near a dominant intrinsic deep level. However, a significant increase in the reverse leakage current due to hopping conduction across shallow traps...
Book Chapter
Series: AIPP Books, Principles
Published: February 2023
10.1063/9780735425033_003
EISBN: 978-0-7354-2503-3
ISBN: 978-0-7354-2500-2
... for the lowest temperatures is attributed to hopping conduction which is not captured in the model. The donor and acceptor concentrations observed for the TMGa grown films are similar to those for TEGa grown Ga2O3 films, demonstrating that the TMGa precursor can produce comparable or better...
Book
Book Cover Image
Series: AIPP Books, Perspectives
Published: December 2022
10.1063/9780735422537
EISBN: 978-0-7354-2253-7
ISBN: 978-0-7354-2251-3
Book Chapter
Series: AIPP Books, Perspectives
Published: December 2022
10.1063/9780735422537_001
EISBN: 978-0-7354-2253-7
ISBN: 978-0-7354-2251-3
... n i ↑ n i ↓ . The first term is the kinetic energy, which illustrates the hopping of electrons from a lattice site j to a site i with an energy scale t that could be determined by the overlap of orbitals for the neighboring atoms (c, c...
Book Chapter
Series: AIPP Books, Perspectives
Published: December 2022
10.1063/9780735422537_002
EISBN: 978-0-7354-2253-7
ISBN: 978-0-7354-2251-3
.... The ribbon geometry is such that it has zigzag edges, as in Fig. 2.16 . In tight-binding approximation, the external magnetic field enters through the hopping integral, which is replaced by the Peierls substitution, namely, (2.119) (2.119) exp ⁡ ( i e h ∫ i j A ⋅ d r ) t...
Book Chapter
Series: AIPP Books, Methods
Published: November 2022
10.1063/9780735424197_007
EISBN: 978-0-7354-2419-7
ISBN: 978-0-7354-2416-6
... around 0.01%, and so the likelihood of sodium ions having an empty octahedral site to hop into is relatively low. Secondly, consider what such a hop involves—there are two potential routes for sodium-ion migration, as shown in Fig. 7.3 , which involve (i) migration across the edge of the octahedron...
Book Chapter
Series: AIPP Books, Methods
Published: November 2022
10.1063/9780735424197_008
EISBN: 978-0-7354-2419-7
ISBN: 978-0-7354-2416-6
... a Keren function, which allows for the extraction of numerous variables, one of which is the so-called “fluctuation rate.” This is directly correlated with the rate of hopping of Li+ cations within the material. Previous powder neutron diffraction work had identified the ionic migration pathway...
Book Chapter
Series: AIPP Books, Methods
Published: December 2022
10.1063/9780735425422_010
EISBN: 978-0-7354-2542-2
ISBN: 978-0-7354-2540-8
... interlayer coupling, which facilitates hopping of electrons and redistribution of charges between layers. It is this property that sets apart twist angle materials from their bulk counterparts. An accurate assessment of both size and configuration of the interlayer is the key to studying exotic properties...
Book Chapter
Series: AIPP Books, Principles
Published: November 2022
10.1063/9780735424470_004
EISBN: 978-0-7354-2447-0
ISBN: 978-0-7354-2444-9
... silicon used in MOSFETs. As a result, the charge transport relies on a thermally activated hopping process and depends on the density of state (DOS) of the semiconductor. Due to the exponential distribution of the DOS as a function of energy near the band edge, when carrier concentration is low, carriers...
Book
Book Chapter
Series: AIPP Books, Methods
Published: November 2022
10.1063/9780735424197_006
EISBN: 978-0-7354-2419-7
ISBN: 978-0-7354-2416-6
... be passed along the way, and we can classify electrode and solid electrolyte materials into three broad categories depending on the dimensionality of ionic conduction through the structure. For example, LiFePO4 crystallizes in the olivine crystal structure, and lithium ions can hop only through...
Book
Book Cover Image
Series: AIPP Books, Methods
Published: December 2022
10.1063/9780735425422
EISBN: 978-0-7354-2542-2
ISBN: 978-0-7354-2540-8
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