{
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    {
        "datetime_modified":"20261016T110239",
        "datetime_start":"20261027T160000",
        "datetime_end":"20261027T170000",
        "has_end_time":1,
        "date_start":"2026-10-27",
        "date_end":"2026-10-27",
        "time_start":"16:00:00",
        "time_end":"17:00:00",
        "time_zone":"America\/Detroit",
        "event_title":"CM-AMO Seminar | Controlling Superconductivity and Topology through Electronic Correlations, Electron-  Lattice Coupling, and Interface Engineering",
        "occurrence_title":"",
        "combined_title":"CM-AMO Seminar | Controlling Superconductivity and Topology through Electronic Correlations, Electron-  Lattice Coupling, and Interface Engineering: Subhasish Mandal  (West Virginia University)",
        "event_subtitle":"Subhasish Mandal  (West Virginia University)",
        "event_type":"Workshop \/ Seminar",
        "event_type_id":"21",
        "description":"High-temperature superconductivity and topological quantum matter remain among the central challenges in condensed matter physics. Their coexistence offers a promising route toward realizing Majorana zero modes and fault-tolerant quantum technologies. While studies of topological materials and electron-phonon coupling have largely relied on single particle descriptions, the role of strong electronic correlations remains unresolved. In particular, it is unclear (i) how correlations modify electron-phonon coupling [1] and lattice dynamics in determining superconducting transition temperatures and (ii) how electron-electron interactions drive topological systems beyond the single-particle limit. \n\nIn this talk, I will discuss our efforts to address these questions using parameter tuning-free embedded dynamical mean-field theory (eDMFT) [2]. By combining epitaxial thin-film growth, angle-resolved photoemission spectroscopy (ARPES), and scanning tunneling microscopy\/spectroscopy (STM\/S). Focusing on FeX (X = Se, S, Te) thin films on SrTiO\u2083 (001), we demonstrate a strong dependence of the superconducting transition temperature () on the FeX\u2084 tetrahedral bond angle, highlighting the crucial role of lattice geometry in correlated superconductivity [3]. We further present evidence for topological superconductivity and identify a distinct phase that competes with strong electronic correlations[4]. Remarkably, both the measured superconducting gap and the eDMFT-derived electron-phonon coupling exhibit a dome-shaped dependence on the tetrahedral angle [5]. I will then show how these insights can be extended toward a predictive, materials-by-design framework for topological superconductivity. Applying a multiscale framework to FeTe\u2080.\u2085Se\u2080.\u2085 and FeSe\/GaAs heterostructures, we predict multiple topological superconducting phases and identify experimentally viable materials platforms in which topology, superconductivity, and strong correlations can be engineered in concert [5,6]. Together, these results demonstrate how electronic correlations, lattice geometry, and interface engineering can be harnessed to control superconductivity and topology, providing a pathway toward the rational design of correlated topological quantum materials and future Majorana-based quantum technologies.\n\nReferences:\n[1] S. Mandal et al. PRB 89, 220502(R) (2014); S. Gerber et al. Science 357, 71 (2017).\n[2] A. Sihi, S. Mandal, & K. Haule, Phys. Rev. B (Lett.) 113, L201116 (2026); (Editor's suggestion)\n[3] S. Mandal et al. PRL. 119, 067004 (2017); Q. Zou, et al. Nano Letters 25, (47) 16572 (2025)\n[4] H. Lin, et al. Nature Communications 17, 1188 (2026)\n[5] Q. Zou, et al. Phys. Rev. B 114, 225123 (2026) (Editor's suggestion) \n[6] Jacobs et al. arXiv:2609.10381 (2026).",
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        "location_name":"West Hall",
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        "tags":["Physics","Science"],
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