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arXiv · 1211.2244

Local Spectral Inversion and Bosonic Fine Structure Extraction via Superconducting Scanning Tunneling Spectroscopy

F. C. Niestemski·S. Johnston·A. W. Contryman·C. D. Camp·T. P. Devereaux·H. C. Manoharan
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Abstract

We perform the scanning tunneling spectroscopy based superconductor-vacuum-superconductor analogue to the seminal McMillan and Rowell superconductor-insulator-superconductor device study of phonons in the archetypal elemental superconductor Pb [W. L. McMillan and J. M. Rowell, Phys. Rev. Lett. 14, 108 (1965)]. We invert this spectroscopic data utilizing strong-coupling Eliashberg theory to obtain a local α^2F(ω) and find broad underlying agreement with the pioneering results, highlighted by previously unobserved electron-hole asymmetries and new fine structure which we discuss in terms of both conventional and unconventional superconducting bosonics.

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F. C. Niestemski, S. Johnston, A. W. Contryman, C. D. Camp, T. P. Devereaux, H. C. Manoharan. 2012-11-09. Local Spectral Inversion and Bosonic Fine Structure Extraction via Superconducting Scanning Tunneling Spectroscopy. https://arxiv.org/abs/1211.2244

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