A novel Schottky contact super barrier rectifier with a top N-enhancement layer and a P-injector

Chen, Wensuo; Liao, Ruijin; Zeng, Zheng; Zhang, Peijian

doi:10.1007/s10825-018-1128-6

Cited by 4 publications

(1 citation statement)

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“…The compound BaPd 2 As 2 in the focus of this article represents the end member of the Pd-doped series and exists in the form of two types of crystal structures: ThCr 2 Si 2 -structure type (I4/mmm) and CeMgSi 2 -structure type (P4/mmm) [11,12]. The former structure has bulk superconductivity with T c = 3.85 K, while in the latter structure only filamentary superconductivity was observed below 2 K. This shows that the crystal structure has a predominant effect on the superconducting prop-erties of these systems [14][15][16]. Given that Fe likely has a leading effect on the high temperature superconductivity in doped BFA, the effect of partial substitution of Fe on superconducting properties in general, and on their anisotropy evolution remains unaddressed.…”

Section: Introductionmentioning

confidence: 99%

High-pressure effects on isotropic superconductivity in the iron-free layered pnictide superconductor BaPd2As2

et al. 2018

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While the layered 122 iron arsenide superconductors are highly anisotropic, unconventional, and exhibit several forms of electronic orders that coexist or compete with superconductivity in different regions of their phase diagrams, we find in the absence of iron in the structure that the superconducting characteristics of the end member BaPd2As2 are surprisingly conventional. Here we report on a complementary measurements of specific heat, magnetic susceptibility, resistivity measurements, Andreev spectroscopy and synchrotron high pressure X-ray diffraction measurements supplemented with theoretical calculations for BaPd2As2. Its superconducting properties are completely isotropic as demonstrated by the critical fields, which do not depend on the direction of the applied field. Under the application of high pressure, Tc is linearly suppressed, which is the typical behaviour of classical phonon-mediated superconductors with some additional effect of a pressure-induced decrease in the electronic density of states and the electron-phonon coupling parameters. Structural changes in the layered BaPd2As2 have been studied by means of angle-dispersive diffraction in a diamond-anvil cell. At 12 GPa and 27.2 GPa we observed pressure induced lattice distortions manifesting as the discontinuity and, hence discontinuity in the Birch-Murnaghan eqation of state. The bulk modulus is B0 = 40(6) GPa below 12 GPa and B0 = 142(3) GPa below 27.2 GPa.

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Section: Introductionmentioning

confidence: 99%