Spin-orbit coupling with ultrasoft pseudopotentials: Application to Au and Pt

Corso, Andrea Dal; Conte, Adriano Mosca

doi:10.1103/physrevb.71.115106

Cited by 264 publications

(227 citation statements)

References 36 publications

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“…20,21 The convergence of the plane wave basis has been achieved with an energy cutoff of 50 Ry. The integrations over the surface Brillouin zone have been performed using the tetrahedron method 22 considering a 32 × 32 Monkhorst-Pack mesh.…”

Section: Methodsmentioning

confidence: 99%

Relativistic effects and fully spin-polarized Fermi surface at the Tl/Si(111) surface

2011

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We present a detailed analysis of the relativistic electronic structure and the momentum-dependent spinpolarization of the Tl/Si(111) surface. Our first-principle calculations reveal the existence of fully spin-polarized electron pockets associated to the huge spin-splitting of metallic surface bands. The calculated spin-polarization shows a very complex structure in the reciprocal space, strongly departing from simple theoretical model approximations. Interestingly, the electronic spin-state close to the Fermi surface is polarized along the surface perpendicular direction and reverses its orientation between different electron pockets.

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Section: Methodsmentioning

confidence: 99%

Relativistic effects and fully spin-polarized Fermi surface at the Tl/Si(111) surface

2011

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“…The spin-orbit interaction has been incorporated considering normconserving fully relativistic pseudopotentials for the 5d and 6s electrons of Au, including the full spinor structure of the wave functions. 36 The Au(111) surface was modeled by the repeated slab technique considering 21 Au layers, with 21Å of vacuum separating the two sides of the slab and ∼2.49Å separating adjacent Au layers (interlayer spacing). In this surface, a single 2D lattice is described by the basis vector a 1 = ax, a 2 = (x + √ 3ŷ)a/2, with associated reciprocal basis…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

et al. 2013

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We present a detailed analysis of the spin-flip excitations induced by a periodic time-dependent electric field in the Rashba prototype Au(111) noble metal surface. Our calculations incorporate the full spinor structure of the spin-split surface states and employ a Wannier-based scheme for the spin-flip matrix elements. We find that the spin-flip excitations associated with the surface states exhibit an strong dependence on the electron momentum magnitude, a feature that is absent in the standard Rashba model [E. I. Rashba, Sov. Phys. Solid State 2, 1109 (1960)]. Furthermore, we demonstrate that the maximum of the calculated spin-flip absorption rate is about twice the model prediction. These results show that, although the Rashba model accurately describes the spectrum and spin polarization, it does not fully account for the dynamical properties of the surface states.

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“…Another coincidence of the results of the experiment and the model [19] is the increase of generation frequency with increasing of bias current through the mesa-structure. The strong spin-orbit interaction, which is relatively weak in the autonomous manganite LMO [21], and which is necessary for the formation of spin vortices, can be enhanced due to JahnTeller distortion in the mesa-structure due to the influence of the lower YBCO film grown on the NGO substrate [22], and also by the presence of an interlayer of gold, the spin-orbit interaction in which was analyzed in [23]. In conclusion, the YBCO/LMO/Au-Nb mesa-structure with the spin-filter properties demonstrated microwave generation in GHz frequency band with a linewidth of order 50 MHz under the influence of external weak magnetic field |H| <10 Oe and the bias current.…”

Section: Fig1mentioning

confidence: 99%

Superconducting mesa-structures with a spin filtering manganite interlayer

et al. 2018

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Abstract. We report on current transport and magnetism in hybrid superconducting mesa-structures prepared from epitaxial superconductor YBa 2 Cu 3 O 7-δ and manganite LaMnO 3 thin films. Superconducting Au-Nb bilayer was the top electrode. Measurements of magnetic resonance in heterostructure with the only Au top electrode (without Nb) showed ferromagnetic state close to Curie temperature of LaMnO 3 , 150 K. A spin filtering was revealed by measurements of tunneling magneto-resistance. Mesa-structures had no superconducting current even at reduced temperature T=300 mK and the smallest manganite interlayer thickness, d M =5.6 nm. Varying the external magnetic field |H|<10 Oe and dc bias current |I|<0.5 mA the microwave generation with power P <1 pW with a line-width of order 50 MHz was observed in GHz frequency band. The frequency of generation could be tuned by the biasing current with a rate 10 13 Hz/A. The impact of spin polarized current on microwave generation is discussed taking into account the asymmetry of oscillation amplitudes over the applied magnetic field.

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Spin-orbit coupling with ultrasoft pseudopotentials: Application to Au and Pt

Cited by 264 publications

References 36 publications

Relativistic effects and fully spin-polarized Fermi surface at the Tl/Si(111) surface

Relativistic effects and fully spin-polarized Fermi surface at the Tl/Si(111) surface

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

Superconducting mesa-structures with a spin filtering manganite interlayer

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