Integrated epitaxial metal electrodes
Systems and methods are described herein to include an epitaxial metal layer between a rare earth oxide and a semiconductor layer. Systems and methods are described to grow a layered structure, comprising a substrate, a first rare earth oxide layer epitaxially grown over the substrate, a first metal layer epitaxially grown over the rare earth oxide layer, and a first semiconductor layer epitaxially grown over the first metal layer.
1. A layered structure, comprising:
a substrate;
a first rare earth oxide layer epitaxially grown over the substrate;
a first metal layer epitaxially grown over the first rare earth oxide layer, wherein the first metal layer has a non-continuous pattern with a first gap space between a first part of the first metal layer and a second part of the first metal layer; and
a first semiconductor layer epitaxially grown over the first metal layer including both the first gap space and the first part and the second part.
2. The layered structure of claim 1 , wherein the substrate includes any of Si, GaAs, InP, Ga 2 O 3 , and Al 2 O 3 .
3. The layered structure of claim 1 , wherein the substrate has a crystal orientation of either <100> or <111> with a miscut of up to 10 degrees.
4. The layered structure of claim 1 , wherein the first rare earth oxide layer is composed of a rare earth oxide having an oxygen-to-metal ratio between 1 and 2.
5. The layered structure of claim 1 , wherein the first metal layer includes a metal element selected from a transition metal group of a periodic table.
6. The layered structure of claim 1 , wherein the first semiconductor layer includes an element selected from group III, group IV, group V.
7. The layered structure of claim 6 , wherein the first semiconductor layer is composed of Al x Sc 1-x N (0≤x<1).
8. The layered structure of claim 1 , further comprising:
a second metal layer epitaxially grown over the first semiconductor layer.
9. The layered structure of claim 8 , further comprising:
a second semiconductor layer epitaxially grown over the second metal layer.
10. The layered structure of claim 1 , further comprising:
up to 20 repetitions of a combination of a metal layer and a semiconductor layer grown over the first rare earth oxide layer.
11. The layered structure of claim 1 , further comprising:
repetitions of a combination of a metal layer and a rare earth oxide layer grown over the substrate.
12. The layered structure of claim 1 , further comprising:
a second rare earth oxide layer grown over the first semiconductor layer.
13. The layered structure of claim 12 , further comprising
a second metal layer epitaxially grown over the second rare earth oxide layer.
14. The layered structure of claim 1 , further comprising:
a metal-semiconductor interlayer that transits from the first metal layer to the first semiconductor layer, wherein said interlayer comprise at least one element from the first metal layer and the first semiconductor layer.
15. The layered structure of claim 1 , further comprising:
a metal-oxygen interlayer that transits from the first rare earth oxide layer to the first metal layer, wherein said interlayer consists of at least one element from the first metal layer and oxygen.
16. A layered structure, comprising:
a substrate that is composed of Si, and has a crystal orientation of <100>;
a first rare earth oxide layer epitaxially grown over the substrate, wherein the first rare earth oxide layer is composed of ErO 1.5 and has a crystal orientation of <110>;
a first metal layer epitaxially grown over the first rare earth oxide layer, wherein the first metal layer is composed of Mo and has a substantial crystal orientation of <211>; and
a first semiconductor layer epitaxially grown over the first metal layer.
17. The layered structure of claim 16 , wherein the substrate has a crystal orientation of <100> with a miscut of up to 10 degrees.
18. The layered structure of claim 16 , wherein the first rare earth oxide layer is composed of a rare earth oxide having an oxygen-to-metal ratio between 1 and 2.
19. The layered structure of claim 16 , wherein the first metal layer includes a metal element selected from a transition metal group.
20. The layered structure of claim 16 , wherein the first semiconductor layer includes an element selected from group III, group IV, group V.
21. The layered structure of claim 20 , wherein the first semiconductor layer is composed of Al x Sc 1-x N (0≤x<1).
22. The layered structure of claim 16 , further comprising:
a second metal layer epitaxially grown over the first semiconductor layer.
23. The layered structure of claim 22 , further comprising:
a second semiconductor layer epitaxially grown over the second metal layer.
24. The layered structure of claim 16 , further comprising:
up to 20 repetitions of a combination of the first metal layer and the first semiconductor layer grown over the first rare earth oxide layer.
25. The layered structure of claim 16 , further comprising:
repetitions of a combination of the first metal layer and the first rare earth oxide layers grown over the substrate.
26. The layered structure of claim 16 , further comprising:
a second rare earth oxide layer grown over the first semiconductor layer.
27. The layered structure of claim 26 , further comprising
a second metal layer epitaxially grown over the second rare earth oxide layer.
28. The layered structure of claim 16 , further comprising:
a metal-semiconductor interlayer that transits from the first metal layer to the first semiconductor layer, wherein said interlayer comprises at least one element from the first metal layer and the first semiconductor layer.
29. The layered structure of claim 16 , further comprising:
a metal-oxygen interlayer that transits from the first rare earth oxide layer to the first metal layer, wherein said interlayer comprises at least one element from the first metal layer and oxygen.