Bacteriorhodopsin based non-magnetic spin filters for biomolecular spintronics.
Phys Chem Chem Phys
; 20(2): 1091-1097, 2018 Jan 03.
Article
in En
| MEDLINE
| ID: mdl-29238765
ABSTRACT
We discuss spin injection and spin valves, which are based on organic and biomolecules, that offer the possibility to overcome some of the limitations of solid-state devices, which are based on ferromagnetic metal electrodes. In particular, we discuss spin filtering through bacteriorhodopsin in a solid state biomolecular spin valve that is based on the chirality induced spin selectivity (CISS) effect and shows a magnetoresistance of â¼2% at room temperature. The device is fabricated using a layer of bacteriorhodopsin (treated with n-octyl-thioglucoside detergent OTG-bR) that is adsorbed on a cysteamine functionalized gold electrode and capped with a magnesium oxide layer as a tunneling barrier, upon which a Ni top electrode film is placed and used as a spin analyzer. The bR based spin valves show an antisymmetric magnetoresistance response when a magnetic field is applied along the direction of the current flow, whereas they display a positive symmetric magnetoresistance curve when a magnetic field is applied perpendicular to the current direction.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacteriorhodopsins
/
Magnets
Language:
En
Journal:
Phys Chem Chem Phys
Journal subject:
BIOFISICA
/
QUIMICA
Year:
2018
Document type:
Article
Affiliation country:
Israel