From spin-polarized interfaces to giant magnetoresistance in organic spin valves

Deniz Cakir; D.M. Otalvaro Gutierrez; G. Brocks

doi:10.1103/PhysRevB.89.115407

From spin-polarized interfaces to giant magnetoresistance in organic spin valves

Deniz Cakir, D.M. Otalvaro Gutierrez, G. Brocks

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Abstract

We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent interactions at the metal-molecule interfaces. The magnetoresistance of a Fe| bilayer-C 70 | Fe spin valve attains a high value of 70% in the linear-response regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response and also decreases as a function of bias. Both these trends can be modeled in terms of prominent spin-dependent Fe| C 70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents

Original language	Undefined
Article number	115407
Pages (from-to)	115407/1-115407/5
Number of pages	5
Journal	Physical review B: Condensed matter and materials physics
Volume	89
Issue number	115407
DOIs	https://doi.org/10.1103/PhysRevB.89.115407
Publication status	Published - 2014

Keywords

METIS-306424
IR-94964

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10.1103/PhysRevB.89.115407

Cite this

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title = "From spin-polarized interfaces to giant magnetoresistance in organic spin valves",

abstract = "We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent interactions at the metal-molecule interfaces. The magnetoresistance of a Fe| bilayer-C 70 | Fe spin valve attains a high value of 70% in the linear-response regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response and also decreases as a function of bias. Both these trends can be modeled in terms of prominent spin-dependent Fe| C 70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents",

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journal = "Physical review B: Condensed matter and materials physics",

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T1 - From spin-polarized interfaces to giant magnetoresistance in organic spin valves

AU - Cakir, Deniz

AU - Otalvaro Gutierrez, D.M.

AU - Brocks, G.

PY - 2014

Y1 - 2014

N2 - We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent interactions at the metal-molecule interfaces. The magnetoresistance of a Fe| bilayer-C 70 | Fe spin valve attains a high value of 70% in the linear-response regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response and also decreases as a function of bias. Both these trends can be modeled in terms of prominent spin-dependent Fe| C 70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents

AB - We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent interactions at the metal-molecule interfaces. The magnetoresistance of a Fe| bilayer-C 70 | Fe spin valve attains a high value of 70% in the linear-response regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response and also decreases as a function of bias. Both these trends can be modeled in terms of prominent spin-dependent Fe| C 70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents

KW - METIS-306424

KW - IR-94964

U2 - 10.1103/PhysRevB.89.115407

DO - 10.1103/PhysRevB.89.115407

M3 - Article

SN - 1098-0121

VL - 89

SP - 115407/1-115407/5

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

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M1 - 115407

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