First-principles Study of Rashba Spin Splitting at Strained SrTiO<sub>3</sub>(001) Surfaces

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  • Yamaguchi Naoya
    Division of Mathematical and Physical Sciences, Graduate School of Natural Science and Technology, Kanazawa University
  • Ishii Fumiyuki
    Faculty of Mathematics and Physics, Institute of Science and Engineering, Kanazawa University

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<p>We investigated the Rashba spin splittings in a compressive-strained SrTiO3(001) ultra thin-film using first-principles calculations. The effect of the polarization due to the compressive strain leads to the 2DEG with large Rashba spin splittings, where the sheet carrier density is of the same order of magnitude as that of the heterostructure LaAlO3/SrTiO3 (∼1014 cm−2). Some localized surface states (SSs) show the giant Rashba coefficient αR larger than 100 meVÅ. [DOI: 10.1380/ejssnt.2018.360]</p>

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