Theory for Superconductivity in d-Band Metals

Garland, J. W.

doi:10.1063/1.2946179

Cited by 128 publications

(76 citation statements)

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“…The most striking feature of the dependence of the superconducting transition temperature T~ on the number of electrons per atom (e/a) is that it does not follow the "Matthias rule" as in the crystalline case, but rather exhibits a triangular peak around elan7 for the 4d-and 5d-transition metal series [2]. In view of these experimental results it was concluded [2] that recent theories of superconductivity in transition metals [3,5] were not capable of explaining this dependence of T~ on valence.…”

Section: Introductionmentioning

confidence: 92%

“…For numerical analysis of the superconducting transition temperature Tc of amorphous transition metals we used the McMillan theory for d-band superconductivity [5]. Then,…”

Section: Numerical Analysismentioning

confidence: 99%

“…The constant A may depend weakly on the crystal structure and in the following is approximated by [4] 0.96. #* denotes the Coulomb pseudopotential [6] which, in principle, can be determined by the isotope effect measurements or by using [3,5] …”

Section: Numerical Analysismentioning

confidence: 99%

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Theory for superconductivity in amorphous transition metals

Kerker

1973

Z. Physik

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A theory is presented for superconductivity in amorphous transition metals. It is shown that in contrast to simple metals for transition metals the changes in the phonon spectrum, in the electronic density of states and in the electronic matrix elements which result from strong lattice disorder can enhance as well as decrease T c. The numerical results for the superconducting transition temperature T c of amorphous 4d-and 5d-transition metals agree well with the experimental results.

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Section: Introductionmentioning

confidence: 92%

“…For numerical analysis of the superconducting transition temperature Tc of amorphous transition metals we used the McMillan theory for d-band superconductivity [5]. Then,…”

Section: Numerical Analysismentioning

confidence: 99%

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Theory for superconductivity in amorphous transition metals

Kerker

1973

Z. Physik

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“…Here, µ* is the electron-electron interaction parameter, which is estimated using the relation [32] µ* = 0.…”

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confidence: 99%

Pressure dependence of structural phase transition and superconducting transition in CsI

Louis

Iyakutti²

2003

Physica Status Solidi (b)

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The self-consistent band structure calculation for CsI performed both in CsCl and HCP structures using the TB-LMTO method is reported. The equilibrium lattice constant, bulk modulus and the phasetransition pressure at which the compound undergoes structural phase transition from CsCl to HCP are predicted from the total-energy calculations. The band structure, density of states (DOS), electronic charge distributions, metallization and superconducting transition temperature (T c ) of CsI are obtained as a function of pressure for both the CsCl and HCP structures. It is found that the charge transfer from s and p states to d state causes metallization and superconductivity in CsI. The highest T c estimated is 2.11 K and the corresponding pressure is 1.8 Mbar. This value is in agreement with the recent experimental observation. The experimental trend -"metallization and superconductivity is rather insensitive to the crystal structure of CsI" -is also confirmed in our work.

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“…[7]). Our choice of µ * = 0.1 can be justified by the empirical formula proposed by Bennemann and Garland [20].…”

Section: Computational Detailsmentioning

confidence: 99%

Possible High-Temperature Superconductivity in Hygrogenated Fluorine

Papaconstantopoulos¹

2017

Novel Superconducting Materials

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Recent computational studies confirmed by experiment have established the occurrence of superconducting temperatures, Tc, near 200 K when the pressure is close to 200 GPa in the compound H 3 S. Motivated by these findings we investigate in this work the possibility of discovering high-temperature superconductivity in the material H 3 F. We performed linearized augmented plane wave(LAPW) calculations followed by the determination of the angular momentum components of the density of states, the scattering phase shifts at the Fermi level and the electron-ion matrix element known as the Hopfield parameter. Our calculated Hopfield parameters are much larger than those found in H 3 S suggesting that they may lead to large electron-phonon coupling constant and hence a large Tc similar or even larger than that of H 3 S. However, calculations of elastic constants are inconclusive regarding the stability of this material.

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Theory for Superconductivity in d-Band Metals

Cited by 128 publications

References 0 publications

Theory for superconductivity in amorphous transition metals

Theory for superconductivity in amorphous transition metals

Pressure dependence of structural phase transition and superconducting transition in CsI

Possible High-Temperature Superconductivity in Hygrogenated Fluorine

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