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Research paper thumbnail of Prediction of superconducting transition temperatures of heterostructures based on the quasiparticle spectrum

Research paper thumbnail of Prediction of superconducting transition temperatures of heterostructures based on the quasiparticle spectrum

Physical review B, Sep 14, 2016

In this paper we present material specific calculations of superconductor-normal metal heterostru... more In this paper we present material specific calculations of superconductor-normal metal heterostructures using density functional theory combined with a semiphenomenological parametrization of the electron-phonon coupling. In particular, we calculate the quasiparticle spectrum of different normal metal overlayers on a Nb(100) host. We find that the Andreev reflection leads to the formation of momentum dependent quasiparticle bands in the normal metal. As a consequence, the spectrum has a strongly momentum dependent induced gap. We develop a model to calculate the superconducting critical temperature from the thickness dependence of the induced gap. In the case of Au/Nb(100) heterostructures we find very good agreement with experiments. Moreover, predictions are made for similar heterostructures of other compounds.

Research paper thumbnail of Prediction of Superconducting Transition Temperatures for Fe-Based Superconductors using Support Vector Machine

In this paper we present material specific calculations of superconductor-normal metal heterostru... more In this paper we present material specific calculations of superconductor-normal metal heterostructures using density functional theory. In particular, we calculate the quasiparticle spectrum of different normal metal overlayers on a Nb(100) host. We find that the Andreev reflection leads to the formation of momentum dependent quasiparticle bands in the normal metal. As a consequence, the spectrum has a strongly momentum dependent induced gap. From the thickness dependence of the gap size we calculate the superconducting critical temperature of Au/Nb(100) heterostructures where we find very good agreement with experiments. Moreover, predictions are made for similar heterostructures of other compounds.

Research paper thumbnail of Prediction of superconducting transition temperatures of heterostructures based on the quasiparticle spectrum

Research paper thumbnail of Prediction of superconducting transition temperatures of heterostructures based on the quasiparticle spectrum

Physical review B, Sep 14, 2016

In this paper we present material specific calculations of superconductor-normal metal heterostru... more In this paper we present material specific calculations of superconductor-normal metal heterostructures using density functional theory combined with a semiphenomenological parametrization of the electron-phonon coupling. In particular, we calculate the quasiparticle spectrum of different normal metal overlayers on a Nb(100) host. We find that the Andreev reflection leads to the formation of momentum dependent quasiparticle bands in the normal metal. As a consequence, the spectrum has a strongly momentum dependent induced gap. We develop a model to calculate the superconducting critical temperature from the thickness dependence of the induced gap. In the case of Au/Nb(100) heterostructures we find very good agreement with experiments. Moreover, predictions are made for similar heterostructures of other compounds.

Research paper thumbnail of Prediction of Superconducting Transition Temperatures for Fe-Based Superconductors using Support Vector Machine

In this paper we present material specific calculations of superconductor-normal metal heterostru... more In this paper we present material specific calculations of superconductor-normal metal heterostructures using density functional theory. In particular, we calculate the quasiparticle spectrum of different normal metal overlayers on a Nb(100) host. We find that the Andreev reflection leads to the formation of momentum dependent quasiparticle bands in the normal metal. As a consequence, the spectrum has a strongly momentum dependent induced gap. From the thickness dependence of the gap size we calculate the superconducting critical temperature of Au/Nb(100) heterostructures where we find very good agreement with experiments. Moreover, predictions are made for similar heterostructures of other compounds.

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