Abstract
| Original language | Undefined |
|---|---|
| Article number | 104507 |
| Pages (from-to) | 104507-1-104507-7 |
| Number of pages | 7 |
| Journal | Physical review B: Condensed matter and materials physics |
| Volume | 87 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2013 |
Keywords
- METIS-301224
- IR-88757
Cite this
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Andreev bound states and current-phase relations in three-dimensional topological insulators. / Snelder, M.; Veldhorst, M.; Golubov, Alexandre Avraamovitch; Brinkman, Alexander.
In: Physical review B: Condensed matter and materials physics, Vol. 87, No. 10, 104507, 2013, p. 104507-1-104507-7.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Andreev bound states and current-phase relations in three-dimensional topological insulators
AU - Snelder, M.
AU - Veldhorst, M.
AU - Golubov, Alexandre Avraamovitch
AU - Brinkman, Alexander
PY - 2013
Y1 - 2013
N2 - To guide the search for the Majorana fermion, we theoretically study superconductor/topological-insulator/superconductor (S/TI/S) junctions in an experimentally relevant regime. We find that the striking features present in these systems, including the doubled periodicity of the Andreev bound states (ABSs) due to tunneling via Majorana states, can still be present at high electron densities. We show that via the inclusion of magnetic layers, this 4π periodic ABS can still be observed in three-dimensional (3D) topological insulators, where finite angle incidence usually results in the opening of a gap at zero energy and hence results in a 2π periodic ABS. Furthermore, we study the Josephson-junction characteristics and find that the gap size can be controlled and decreased by tuning the magnetization direction and amplitude. These findings pave the way for designing experiments on S/3DTI/S junctions.
AB - To guide the search for the Majorana fermion, we theoretically study superconductor/topological-insulator/superconductor (S/TI/S) junctions in an experimentally relevant regime. We find that the striking features present in these systems, including the doubled periodicity of the Andreev bound states (ABSs) due to tunneling via Majorana states, can still be present at high electron densities. We show that via the inclusion of magnetic layers, this 4π periodic ABS can still be observed in three-dimensional (3D) topological insulators, where finite angle incidence usually results in the opening of a gap at zero energy and hence results in a 2π periodic ABS. Furthermore, we study the Josephson-junction characteristics and find that the gap size can be controlled and decreased by tuning the magnetization direction and amplitude. These findings pave the way for designing experiments on S/3DTI/S junctions.
KW - METIS-301224
KW - IR-88757
U2 - 10.1103/PhysRevB.87.104507
DO - 10.1103/PhysRevB.87.104507
M3 - Article
VL - 87
SP - 104507-1-104507-7
JO - Physical review B: Condensed matter and materials physics
JF - Physical review B: Condensed matter and materials physics
SN - 1098-0121
IS - 10
M1 - 104507
ER -