Reversed spin polarization at the Co(001)-HfO2(001) interface

Design of the local spin polarization at the organic-ferromagnetic interface.

By means of ab initio calculations and spin-polarized scanning tunneling microscopy experiments the creation of a complex energy dependent magnetic structure with a tailored spin-polarized interface is demonstrated. We show this novel effect by adsorbing organic molecules containing π(p(z)) electrons onto a magnetic surface. The hybridization of the out-of-plane p(z) atomic-type orbitals with t...

Probing absolute spin polarization at the nanoscale.

Probing absolute values of spin polarization at the nanoscale offers insight into the fundamental mechanisms of spin-dependent transport. Employing the Zeeman splitting in superconducting tips (Meservey-Tedrow-Fulde effect), we introduce a novel spin-polarized scanning tunneling microscopy that combines the probing capability of the absolute values of spin polarization with precise control at t...

Polarization at the gold/pentacene interface

Direct and inverse photoemission spectroscopy are used to investigate the electronic polarization P = P + P induced by the pentacene anion and cation at the Au/pentacene interface. Based on the spectroscopic measurements and on previously published calculations, we determine that the total polarization at the metal interface is approximately 0.67 eV larger than at the surface of the pentacene f...

Spin polarization and barrier-oxidation effects at the Co alumina interface in magnetic tunnel junctions

Nuclear spin polarization transfer across an organic-semiconductor interface

Motivated by Tycko’s proposal to harness optically pumped nuclear spin polarization for the enhancement of nuclear magnetic resonance ~NMR! signals from biological macromolecules, we investigate the transfer of thermal nuclear spin polarization between H or F in an organic overlayer and P at the surface of micron-sized InP particles by Hartmann–Hahn cross polarization. Comparison with analytic ...