Feldeffekttransistoren

Paul, Reinhold

doi:10.1007/978-3-322-84881-9_5

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“…This is in the same order of magnitude as found for classical semimetals (As: 2.6 ·10 –7 Ω·m, Sb: 4.1 × 10 –7 Ω·m) , or “bad metals” (Hg: 9.6 × 10 –7 Ω·m) and thus 1 order of magnitude higher than for “good metals” such as Cu (1.7 ·10 –8 Ω·m) or Ag (1.6 × 10 –7 Ω·m) . Typical semiconductors (Si: 3.16 × 10 3 Ω·m, Ge: 4.8 × 10 2 Ω·m, GaAs: 10 8 –10 –4 Ω·m) , have much higher specific resistivities. LiGa 6 shows a specific resistivity of 1.9 ·10 –7 Ω·m at room temperature, which is very close to the one of pure gallium.…”

Section: Resultssupporting

confidence: 68%

Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂

Sappl

Hoch

2020

Inorg. Chem.

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Three new binary phases have been synthesized in the Ga-rich part of the Li− Ga system: LiGa 6 , Li 11 Ga 24 , and LiGa 2 . Their crystal structures and the respective phase formation conditions have been investigated with X-ray single crystal structure refinements, Rietveld refinements of X-ray powder diffraction data, and thermal analyses. They complete the Ga-rich part of the Li−Ga phase diagram together with the reported phases Li 6−x Ga 14 with 2 ≤ x ≤ 3 and LiGa 3.42 . The compositions of two of the new gallides, LiGa 6 and LiGa 2 , had been predicted in previous thermoanalytical studies, but their crystal structures remained unknown. All three new binary main group compounds adopt new structure types. LiGa 6 crystallizes with the trigonal space group R3̅ c (No. 167, a = 6.1851(8) Å, c = 23.467(4) Å), Li 11 Ga 24 crystallizes with the hexagonal space group P6 3 mc (No. 186, a = 13.7700(19) Å, c = 23.250(5) Å), and LiGa 2 crystallizes with the orthorhombic space group Cmce (No. 64, a = 8.51953(4) Å, b = 14.44163(7) Å, c = 15.29226(7) Å). All phases form air-and moisture-sensitive crystals of bright metallic luster. They can be synthesized starting from the pure elements and taking into account their incongruent melting behavior by adequate tempering sequences derived from differential scanning calorimetry (DSC) studies of the system. Lithium gallides do not form electron-precise Zintl phases. The electronic structures of these polar intermetallic phases combine ionic, covalent, and metallic bonding contributions and have been analyzed by density functional theory (DFT) calculations in the cases of LiGa 6 and LiGa 2 . Measurements of the specific electronic resistivities have also been performed and prove the metallic behavior.

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Section: Resultssupporting

confidence: 68%

Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂

Sappl

Hoch

2020

Inorg. Chem.

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Feldeffekttransistoren

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Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂

Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂

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Feldeffekttransistoren

Cited by 1 publication

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Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa6, Li11Ga24, and LiGa2

Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa6, Li11Ga24, and LiGa2

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Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂

Synthesis and Crystal Structure of Three Ga-rich Lithium Gallides, LiGa₆, Li₁₁Ga₂₄, and LiGa₂