IN-PERSON EVENT
PhD: Kevin Ga rcía Diez
Directors:
ICREA Prof. Ai tor Mugarza (ICN2) &\; Dr. Massimo Tallarida (ALBA Synchrotron)
T he thesis investigates the atomic structure\, growth evolution\, and elect ronic properties of bismuth-based monolayers and ultrathin films grown on metallic substrates. Combining scanning tunneling microscopy/spectroscopy (STM/STS)\, low-energy electron diffraction (LEED)\, angle-resolved photoe mission spectroscopy (ARPES)\, and density functional theory (DFT)\, the r esearch elucidates how reduced dimensionality and interface interactions g overn the emergence of novel two-dimensional (2D) bismuth-based phases.
Key contributions include establishing a reproducible preparation meth od for saturated Bi(110) monolayers\, resolving their long-range atomic su perperiodicity of its Moire pattern\, and mapping their electronic band st ructures for the first time. Additionally\, the work explores alkali-metal deposition as a tuning strategy\, demonstrating that lithium deposition o n Bi(110)/Ag(111) triggers a structural phase transition into an ordered B iLi_2 alloy with a 2D hole-like band dispersion\, and establishes the prec ise temperature-dependent stability window of ultraflat β-bismuthene on A g(111). These findings advance the understanding of bismuth-based 2D mater ials with potential quantum and spintronic applications.
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DTSTART:20261116T100000 DTEND:20261116T120000 LOCATION:ICN2 Seminar Room CATEGORIES:ICN2 Theses Defence END:VEVENT END:VCALENDAR