Electronic and crystal structures of osmium under high pressure

Cui, Tian; Zhang, Lijun; Xie, Yu; Zou, Guangtian; Tse, John S.; Gao, Xing; Klug, D. D.

doi:10.1103/physrevb.72.174103

Cited by 61 publications

(74 citation statements)

References 38 publications

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“…Superconductivity has been predicted for n-type diamond with values of T c vs. carrier concentration rather similar to those calculated for p-type samples [6]. Unfortunately, the solubility of the dopant (electron concentrations below 5 Â 10 18 cm À3 [7]) seems to be lower than that required for the appearance of superconductivity (3.6 Â 10 21 cm À3 [6]).…”

Section: Article In Presssupporting

confidence: 63%

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Superconductivity in diamond, electron–phonon interaction and the zero-point renormalization of semiconducting gaps

Baskaran

2006

Science and Technology of Advanced Materials

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The superconductivity observed in boron-doped diamond is discussed from the point of view of the phonon-driven BCS theory. It is shown that electron-phonon interaction is particularly strong in diamond. Other semiconductors possibly exhibiting superconductivity are brought to the fore. Related evidence for strong electron-phonon interaction in semiconductors containing carbon, nitrogen and oxygen is presented. r

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Section: Article In Presssupporting

confidence: 63%

“…Unfortunately, the solubility of the dopant (electron concentrations below 5 Â 10 18 cm À3 [7]) seems to be lower than that required for the appearance of superconductivity (3.6 Â 10 21 cm À3 [6]). It is, however, easy to rationalize the similarity of the T c 's predicted for p-and n-type diamond.…”

Section: Article In Pressmentioning

confidence: 99%

Superconductivity in diamond, electron–phonon interaction and the zero-point renormalization of semiconducting gaps

Baskaran

2006

Science and Technology of Advanced Materials

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“…(10) with µ * = 0.1 ∼ 0.15, we predict the transition temperature of this material to be in the range T c = 140 ∼ 160 K. The barrier to reaching T c values of this magnitude in diamond is the difficulty of including boron into the material beyond the solubility limit and the formation of boron-based impurities that don't act as acceptors 37 . A recent study 38 has examined the possibility of electron-doping in diamond, which they conclude might lead to larger T c values than hole-doping. This study was based on small doping levels, less than 6%, and we continue this argument to the doping limits.…”

Section: Tc Bounds Of Covalent Metalsmentioning

confidence: 99%

Two bounds on the maximum phonon-mediated superconducting transition temperature

Moussa

Cohen

2006

Phys. Rev. B

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Two simple bounds on the Tc of conventional, phonon-mediated superconductors are derived within the framework of Eliashberg theory in the strong coupling regime. The first bound is set by the total electron-phonon coupling available within a material given the hypothetical ability to arbitrarily dope the material. This bound is studied by deriving a generalization of the McMillan-Hopfield parameter, η(E), which measures the strength of electron-phonon coupling including anisotropy effects and rigid-band doping of the Fermi level to E. The second bound is set by the softening of phonons to instability due to strong electron-phonon coupling with electrons at the Fermi level. We apply these bounds to some covalent superconductors including MgB2, where Tc reaches the first bound, and boron-doped diamond, which is far from its bounds.

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“…While there has been some effort to apply what has been learned from MgB 2 to find other similar, or even better, superconductors, so far MgB 2 remains in a class by itself. Diamond, when it is heavily doped with B, becomes superconducting 15,16 with reports as high as 12 K. B-doped diamond has features in common 17,18,19,20,21 with MgB 2 except for the twodimensionality (2D) of MgB 2 's electronic structure. It is this 2D character we deal with here, one important aspect of which has not been emphasized previously.…”

Section: Introductionmentioning

confidence: 99%

Design for a Room-Temperature Superconductor

Pickett

2006

J Supercond

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The vision of "room temperature superconductivity" has appeared intermittently but prominently in the literature since 1964, when W. A. Little and V. L. Ginzburg began working on the problem of high temperature superconductivity around the same time. Since that time the prospects for room temperature superconductivity have varied from gloom (around 1980) to glee (the years immediately after the discovery of HTS), to wait-and-see (the current feeling). Recent discoveries have clarified old issues, making it possible to construct the blueprint for a viable room temperature superconductor.

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Electronic and crystal structures of osmium under high pressure

Cited by 61 publications

References 38 publications

Superconductivity in diamond, electron–phonon interaction and the zero-point renormalization of semiconducting gaps

Superconductivity in diamond, electron–phonon interaction and the zero-point renormalization of semiconducting gaps

Two bounds on the maximum phonon-mediated superconducting transition temperature

Design for a Room-Temperature Superconductor

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