$d_{xz/yz}$ Orbital Subband Structures and Chiral Orbital Angular Momentum in the (001) Surface States of SrTiO${}_3$

Abstract

We have performed angle resolved photoemission spectroscopy (ARPES) experiments on the surface states of SrTiO${}_3$(001) using linearly and circularly polarized light to investigate the subband structures of out-of-plane $d_{xz/yz}$ orbitals and chiral orbital angular momentum (OAM). The data taken in the first Brillouin zone reveal new subbands for $d_{xz/yz}$ orbitals with Fermi wave vectors of 0.25 and 0.45 ${\mathring{\mathrm{A}}}^{-1}$ in addition to the previously reported ones. As a result, there are at least two subbands for all the Ti 3d t${}_{2g}$ orbitals. Our circular dichroism ARPES data is suggestive of a chiral OAM structure in the surface states and may provide clues to the origin of the linear Rashba-like surface band splitting.

arXiv comment7 pages, 3 figures, Journal paper

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Cited by in corpus (4)

• Anisotropic Electronic Structure of the Two-Dimensional Electron Gas at the AlOx/KTaO3(110) interface
• A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
• BinPo: An open-source code to compute the band structure of two-dimensional electron systems
• Three-dimensionality of mobile electrons at X-ray-irradiated LaAlO${}_3$/SrTiO${}_3$ interfaces