Dual quantum confinement and anisotropic spin splitting in the multi-valley semimetal PtSe${}_2$

Abstract

We investigate the electronic structure of a two-dimensional electron gas created at the surface of the multi-valley semimetal 1T-PtSe${}_2$. Using angle-resolved photoemission and first-principles-based surface space charge calculations, we show how the induced quantum well subband states form multiple Fermi surfaces which exhibit highly anisotropic Rashba-like spin splittings. We further show how the presence of both electron- and hole-like bulk carriers causes the near-surface band bending potential to develop an unusual non-monotonic form, with spatially-segregated electron accumulation and hole accumulation regions, which in turn amplifies the induced spin splitting. Our results thus demonstrate the novel environment that semimetals provide for tailoring electrostatically-induced potential profiles and their corresponding quantum subband states

arXiv comment8 pages, 6 figures

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Cited by in corpus (3)

• Bulk and surface electronic states in the dosed semimetallic HfTe${}_2$
• Holstein polarons, Rashba-like spin splitting and Ising superconductivity in electron-doped MoSe2
• Enhanced Edelstein effect and interdimensional effects in an electron gas with Rashba spin-orbit coupling interface