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- W2895436021 abstract "The family of the endohedral gallide cluster compounds recently emerged as a new family of superconductors which is expected to host systems displaying unconventional physics. ${mathrm{Mo}}_{8}{mathrm{Ga}}_{41}$ is an important member of this family which shows relatively large ${T}_{c}ensuremath{sim}10$ K and has shown indications of strong electron-phonon coupling and multiband superconductivity. Here, through direct measurement of superconducting energy gap by scanning tunneling spectroscopy (STS), we demonstrate the existence of two distinct superconducting gaps of magnitude 0.85 and 1.6 meV, respectively, in ${mathrm{Mo}}_{8}{mathrm{Ga}}_{41}$. Both gaps are seen to be conventional in nature as they evolve systematically with temperature as per the predictions of BCS theory. Our band structure calculations reveal that only two specific Mo sites in a unit cell contribute to superconductivity where only ${d}_{xz}/{d}_{yz}$ and ${d}_{{x}^{2}ensuremath{-}{y}^{2}}$ orbitals have strong contributions. Our analysis indicates that the site-elective contribution governs the two-gap nature of superconductivity in ${mathrm{Mo}}_{8}{mathrm{Ga}}_{41}$." @default.
- W2895436021 created "2018-10-12" @default.
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- W2895436021 date "2019-02-06" @default.
- W2895436021 modified "2023-10-02" @default.
- W2895436021 title "Multiband superconductivity in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Mo</mml:mi><mml:mn>8</mml:mn></mml:msub><mml:msub><mml:mi>Ga</mml:mi><mml:mn>41</mml:mn></mml:msub></mml:mrow></mml:math> driven by a site-selective mechanism" @default.
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- W2895436021 doi "https://doi.org/10.1103/physrevb.99.054503" @default.
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