This review is devoted to one of the most promising two-dimensional (2D) materials,
graphene. Graphene can be prepared by different methods and the one discussed here is …

The quantum Hall effect (QHE), and devices reliant on it, will continue to serve as the
foundation of the ohm while also expanding its territory into other SI derived units. The …

2019 年5 月20 日, 国际单位制(sI) 实现了7 个基本单位均以基本物理常数为基准,
计量体系迎来“计量单位量子化” 和“量值传递扁平化” 重大变革. 电磁计量在计量学领域中占据 …

Tuning the charge carrier density of two-dimensional (2D) materials by incorporating
dopants into the crystal lattice is a challenging task. An attractive alternative is the surface …

This work presents precision measurements of quantized Hall array resistance devices
using superconducting, crossover-free and multiple interconnections as well as graphene …

We present an overview of the electrical, mechanical, and thermal properties of
polycrystalline graphene. Most global properties of this material, such as the charge mobility …

Efforts to make the International System of Units (SI) more accessible have been growing
since the global redefinition of the SI in 2019. Presently, the ohm is defined through the …

Several graphene quantized Hall resistance (QHR) devices manufactured at the National
Institute of Standards and Technology (NIST) were compared with GaAs QHR devices and a …

A new type of graphene-based quantum Hall standards is tested for electrical quantum
metrology applications at alternating current (ac) and direct current (dc). The devices are …

Monolayer epitaxial graphene (EG) has been shown to have clearly superior properties for
the development of quantized Hall resistance (QHR) standards. One major difficulty with …