Theory of spin-orbit-induced spin relaxation in functionalized graphene

  title={Theory of spin-orbit-induced spin relaxation in functionalized graphene},
  author={Jan Bundesmann and Denis Kochan and Fedor Tkatschenko and Jaroslav Fabian and Klaus Richter},
  journal={Physical Review B},
We perform a comparative study of the spin relaxation by spin-orbit coupling induced from adatoms (hydrogen and fluorine) in graphene. Two methods are applied, giving consistent results: a full quantum transport simulation of a graphene nanoribbon, and a T-matrix calculation using Green's functions for a single adatom in graphene. For hydrogenated graphene the dominant spin-orbit term for spin relaxation is PIA, the hitherto neglected interaction due to pseudospin inversion asymmetry. In… 

Figures from this paper

Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons.
This study is conducted at singular ribbon lengths entirely from fully ab initio methods, providing indirectly evidence that the Dyakonov-Perel spin relaxation mechanism might be the dominant at low concentrations as well as the observation of oscillations in the spin-polarization.
Spin relaxation in disordered graphene: Interplay between puddles and defect-induced magnetism
Abstract We study the spin relaxation in graphene due to magnetic moments induced by defects. We propose and employ in our studies a microscopic model that describes magnetic impurity scattering
Spin relaxation in fluorinated single and bilayer graphene
We present a joint experiment-theory study on the role of fluorine adatoms in spin and momentum scattering of charge carriers in dilute fluorinated graphene and bilayer graphene. The experimental
Tuning the spintronic properties of graphene with atomically precise Au clusters
Spin relaxation is investigated in lateral nonlocal graphene spin valves with increasing densities of soft-landed Au3 and Au6 clusters. It is found that both gold clusters scatter spins via the
Absence of a giant spin Hall effect in plasma-hydrogenated graphene
The weak spin-orbit interaction in graphene was predicted to be increased, e.g., by hydrogenation. This should result in a sizable spin Hall effect (SHE). We employ two different methods to examine
Determination of the spin-lifetime anisotropy in graphene using oblique spin precession
The spin-lifetime anisotropy of graphene on silicon oxide is independent of carrier density and temperature down to 150 K, and much weaker than previously reported, which indicates that the spin relaxation is driven by magnetic impurities or random spin-orbit or gauge fields.
Theoretical investigations of orbital and spin-orbital effects in functionalized graphene
Functionalization of graphene with adsorbants offers the possibility to tailor existing properties of graphene and also to introduce new desirable features in the system. The ultimate goal is to
Spin Relaxation in s-Wave Superconductors in the Presence of Resonant Spin-Flip Scatterers.
This work investigates the relaxation of quasiparticle spins in graphene proximitized by an s-wave superconductor in the presence of resonant magnetic and spin-orbit active impurities and results are opposite to the Hebel-Slichter expectation: the spin relaxation decreases with decreasing temperature.
Spin relaxation, Josephson effect and Yu-Shiba-Rusinov states in superconducting bilayer graphene
Bilayer graphene has two non-equivalent sublattices and, therefore, the same adatom impurity can manifest in spectrally distinct ways—sharp versus broad resonances near the charge neutrality—
Interplay of resonant states and Landau levels in functionalized graphene
Adsorbates can drastically alter physical properties of graphene. Particularly important are adatoms and admolecules that induce resonances at the Dirac point. Such resonances limit electron


Spin-dependent Transport in Graphene Nanostructures
Graphene, a two-dimensional material consisting of carbon atoms arranged in a honeycomb lattice, has become famous for the evidence that its electronic structure approximately corresponds to the one
Quantum transport in nanostructures: From computational concepts to spintronics in graphene and magnetic tunnel junctions
Both the field of spintronics - utilizing the spin degree of freedom of charge carriers - as well as the field of graphene - a single layer of graphite - offer promising perspectives for a future
“A and B”:
Direct fabrication of large micropatterned single crystals. p1205 21 Feb 2003. (news): Academy plucks best biophysicists from a sea of mediocrity. p994 14 Feb 2003.
  • Rev. Lett. 103, 026804
  • 2009
  • Commun. 6, 6766
  • 2015
Nature Commun
  • 6, 6766
  • 2015
  • Rev. B 92, 014405
  • 2015
  • Rev. B 91, 115141
  • 2015
Nano Lett
  • 14, 6050
  • 2014
Nano Letters 14
  • 6050
  • 2014