# Electric field tunable superconductor-semiconductor coupling in Majorana nanowires

@article{deMoor2018ElectricFT, title={Electric field tunable superconductor-semiconductor coupling in Majorana nanowires}, author={Michiel W. A. de Moor and Jouri D. S. Bommer and Di Xu and G. W. Winkler and Andrey Antipov and Arno Bargerbos and Guanzhong Wang and Nick van Loo and R. L. M. Op het Veld and Sa{\vs}a Gazibegovi{\'c} and Diana Car and John A Logan and Mihir Pendharkar and Joon Sue Lee and Erik P A M Bakkers and Chris J. Palmstr{\o}m and R. M. Lutchyn and L. P. Kouwenhoven and Hao Zhang}, journal={New Journal of Physics}, year={2018} }

We study the effect of external electric fields on superconductor-semiconductor coupling by measuring the electron transport in InSb semiconductor nanowires coupled to an epitaxially grown Al superconductor. We find that the gate voltage induced electric fields can greatly modify the coupling strength, which has consequences for the proximity induced superconducting gap, effective g-factor, and spin-orbit coupling, which all play a key role in understanding Majorana physics. We further show…

## 51 Citations

Effects of Gate-Induced Electric Fields on Semiconductor Majorana Nanowires

- Physics, Materials SciencePhysical Review X
- 2018

We study the effect of gate-induced electric fields on the properties of semiconductor-superconductor hybrid nanowires which represent a promising platform for realizing topological superconductivity…

Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires.

- Physics, MedicinePhysical review letters
- 2019

The approach identifies the direction of the spin-orbit field, which is strongly affected by the superconductor geometry and electrostatic gates, and reveals SOI with a strength of 0.15-0.35 eV Å.

Robust topological superconductivity in weakly coupled nanowire-superconductor hybrid structures

- Physics
- 2021

We investigate the role of the coupling between a spin-orbit coupled semiconductor nanowire and a conventional s-wave superconductor on the emergence of the topological superconducting phase with…

Evidence for Majorana phases in the magnetoconductance of topological junctions based on two-dimensional electron gases

- Physics
- 2020

We calculate the linear conductance of a two-dimensional electron gas (2DEG)-based junction between a normal semiconductor section and a hybrid semiconductor-superconductor section, under…

Unified numerical approach to topological semiconductor-superconductor heterostructures

- PhysicsPhysical Review B
- 2019

We develop a unified numerical approach for modeling semiconductor-superconductor heterostructures. All the key physical ingredients of these systems - orbital effect of magnetic field,…

Charge-Impurity Effects in Hybrid Majorana Nanowires

- PhysicsPhysical Review Applied
- 2021

We address an outstanding problem that represents a critical roadblock in the development of the Majoranabased topological qubit using semiconductor-superconductor hybrid structures: the quantitative…

Conductance smearing and anisotropic suppression of induced superconductivity in a Majorana nanowire

- PhysicsPhysical Review B
- 2019

In a recent high-quality experimental work on normal metal--superconducting nanowire junctions arXiv:1807.01940 (2018), strong anisotropic suppression of induced superconductivity has been observed…

Curvature of gap closing features and the extraction of Majorana nanowire parameters

- PhysicsPhysical Review B
- 2019

Recent tunneling conductance measurements of Majorana nanowires show a strong variation in the magnetic field dependence of the superconducting gap among different devices. Here, we theoretically…

Effects of the electrostatic environment on superlattice Majorana nanowires

- PhysicsPhysical Review B
- 2019

Finding ways of creating, measuring and manipulating Majorana bound states (MBSs) in superconducting-semiconducting nanowires is a highly pursued goal in condensed matter physics. It was recently…

Physical mechanisms for zero-bias conductance peaks in Majorana nanowires

- Physics
- 2019

Motivated by the need to understand and simulate the ubiquitous experimentally-observed zero-bias conductance peaks in superconductor-semiconductor hybrid structures, we theoretically investigate the…

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