NANOSCALE ELECTRONIC SPIN FILTER
First Claim
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1. A spin filter device comprising two metal electrodes ended with low-coordinated surfaces and at least one atomic scale junction between said surfaces;
- said atomic scale junction comprising;
at least one oxygen atom;
orat least one atomic chain formed by atoms of said metal and oxygen atoms interconnected between said metal atoms;
thereby enhancing a spin-filtering effect by selective p-d orbital hybridization between the p orbitals of the oxygen and the d orbitals of the metal, promoting spin-polarized currents via frontier d orbitals of the metal and suppressing poorly spin polarized-currents via frontier s orbitals of the metal.
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Abstract
The present invention is in the field of spintronics, and relates to a highly efficient spin filter device, such as a spin-polarizer or a spin valve, and a method for fabrication thereof.
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Citations
25 Claims
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1. A spin filter device comprising two metal electrodes ended with low-coordinated surfaces and at least one atomic scale junction between said surfaces;
- said atomic scale junction comprising;
at least one oxygen atom;
orat least one atomic chain formed by atoms of said metal and oxygen atoms interconnected between said metal atoms; thereby enhancing a spin-filtering effect by selective p-d orbital hybridization between the p orbitals of the oxygen and the d orbitals of the metal, promoting spin-polarized currents via frontier d orbitals of the metal and suppressing poorly spin polarized-currents via frontier s orbitals of the metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- said atomic scale junction comprising;
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9. A method of fabrication of a spin filter device, the method comprising:
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providing a wire (or a segment thereof) made of a ferromagnetic or antiferromagnetic metal; controllably elongating a region of said wire until identifying at least one predetermined elongation condition of the wire; exposing at least said region of the wire to oxygen environment, thereby forming in said region an atomic scale junction comprising; at least one oxygen atom;
orat least one atomic chain formed by the metal and oxygen atoms interconnected between the metal atoms; resulting in a selective p-d orbital hybridization between the p orbitals of the oxygen and the d orbitals of the metal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of fabrication of the spin filter device, said method comprising:
- controllably depositing a single oxygen atom or metal and oxygen atoms on a first substrate to form an oxygen atom attached to said substrate or to form at least one metal-oxygen atomic chain(s) attached to said substrate.
- View Dependent Claims (20, 21, 22, 23, 24, 25)
Specification