Universal rotation gauge via quantum anomalous Hall effect
Description
These are data to the paper:
A. Shuvaev, L. Pan, L. Tai, P. Zhang, K. L. Wang, and A. Pimenov
“Universal rotation gauge via quantum anomalous Hall effect”
(featured article) Appl. Phys. Lett. 121, 193101 (2022). https://doi.org/10.1063/5.0105159
File format: "OriginPro" (OriginLab Corporation)
For the free Viewer see the link: https://www.originlab.com/viewer/ . All the necessary information is in Q&A section.
The file "step_in_transmission.oggu" contains
a) Transmission of the (Cr0.12Bi0.26Sb0.62)2Te3 film on the substrate in zero magnetic field showing the Fabry–Perot resonances. Symbols cottespond to the experiment, solid lines - to theoretical transmission of a film on a substrate.
b) Off-diagonal (Hall) transmission and a phase shift as function of external magnetic field.
c) Hall resistivity.
The file "Faraday_rotation_step.oggu" contains the data to the step in Faraday rotation that are equal to the fine-structure constant.
Also given are:
a) Frequency dependece of the step amplitude.
b) Temperature dependence of the step amplitude for two samples.
c) Temperature dependence of the step in Hall resistivity
Abstract
These are data to the paper:
A. Shuvaev, L. Pan, L. Tai, P. Zhang, K. L. Wang, and A. Pimenov
“Universal rotation gauge via quantum anomalous Hall effect”
(featured article) Appl. Phys. Lett. 121, 193101 (2022). https://doi.org/10.1063/5.0105159
Abstract. Integer quantum Hall effect allows to gauge the resistance standard up to more than one part in a billion. Combining it with the speed of light, one obtains the fine-structure constant a 1/137, a dimensionless reference number that can be extracted from a physical experiment. Most exact notion of this value and especially its possible variation on the cosmological time scales is of enormous relevance for fundamental science. In an optical experiment, the fine-structure constant can be directly obtained as purely geometrical angle by measuring the quantized rotation of light polarization in two-dimensional quantum wells. In realistic conditions, high external magnetic fields have to be applied, which strongly affects possible attainable accuracy. An elegant solution of this problem is provided by quantum anomalous Hall effect where a universal quantized value can be obtained in zero magnetic field. Here, we measure the fine-structure constant in a direct optical experiment that requires no material adjustments or technical calibrations. By investigating the Faraday rotation at the interference maxima of the dielectric substrate, the angle close to one a is obtained at liquid helium temperatures without using a dilution refrigerator. Such calibration
and parameter-free experiment provides a system-of-unit-independent access to universal quantum of rotation.
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Additional details
Related works
- Is supplement to
- Dataset: 10.1063/5.0105159 (DOI)
Funding
Dates
- Collected
- 2026