Momentum matching for van der waals contacts between two-dimensional and three-dimensional heterogeneous materials
AssigneeGeorgia State University Research Foundation, Inc.
InventorSidong Lei
Life of this patent
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Abstract
A method of increasing electrical conductivity of a contact between a two-dimensional (2D) material and a three-dimensional (3D) material comprises introducing metallic scattering media at an interface between the 2D material and the 3D material. The metallic scattering media reduces momentum mismatch between charge carriers in the 2D material and charge carriers in the 3D material by providing transverse momentum to the charge carriers during quantum tunneling across a van der Waals gap at the interface.
Claims20
A method of increasing electrical conductivity of a contact between a two-dimensional (2D) material and a three-dimensional (3D) material, comprising:
- introducing metallic scattering media at an interface between the 2D material and the 3D material, wherein the metallic scattering media reduces momentum mismatch between charge carriers in the 2D material and charge carriers in the 3D material by providing transverse momentum to the charge carriers during quantum tunneling across a van der Waals gap at the interface.
A device, comprising:
- a three-dimensional (3D) substrate;
- a two-dimensional (2D) material layer disposed over the 3D substrate, wherein a van der Waals contact is formed at an interface between the 2D material layer and the 3D substrate;
- and
- metallic scattering media positioned to reduce momentum mismatch between charge carriers in the 2D material layer and charge carriers in the 3D substrate,
- wherein the metallic scattering media has a Fermi radius sufficient to scatter electrons and provide transverse momentum to compensate for the momentum mismatch.
A method of fabricating an ohmic van der Waals contact between a two-dimensional (2D) material and a three-dimensional (3D) material, comprising:
- providing a 3D substrate having an exposed contact region;
- depositing metallic scattering media on the exposed contact region of the 3D substrate;
- and
- transferring a 2D material layer onto the 3D substrate such that the 2D material layer covers the exposed contact region and the metallic scattering media is positioned at an interface between the 2D material layer and the 3D substrate,
- wherein the metallic scattering media compensates for transverse momentum mismatch between the 2D material layer and the 3D substrate.
Dependencies are inferred from the claim text.