Microscopic model for the hidden Rashba effect in YBa$_2$Cu$_3$O$_{6+x}$

W. A. Atkinson

doi:10.1103/PhysRevB.101.024513

paper

Microscopic model for the hidden Rashba effect in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

arXiv:1910.11444 · doi:10.1103/PhysRevB.101.024513

Abstract

Each unit cell in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$ contains a pair of two-dimensional CuO $_{2}$ layers. While the crystal structure is globally inversion symmetric, the individual layers are not. This leads, necessarily, to a nonvanishing Rashba spin-orbit coupling (SOC) in the CuO $_{2}$ layers, with opposite signs of the coupling constant in each layer. These so-called Rashba bilayers generate hidden spin textures, with a vansishing net spin at each $k$ -point in the Brillouin zone, but nonvanishing spin textures in each layer separately. Here, we trace the microscopic origin of the Rashba splitting through the orbital structure of the CuO $_{2}$ conduction bands, obtain a generic three-orbital model Hamiltonian, and show that the magnitude of the spin-splitting predicted by density functional theory is $\sim 10$ ~meV.

Microscopic model for the hidden Rashba effect in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Abstract

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Microscopic model for the hidden Rashba effect in YBa2​Cu3​O6+x​

Abstract

References in corpus (28)

Cited by in corpus (7)

Microscopic model for the hidden Rashba effect in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$