Seminarium Fizyki Ciała Stałego

In the talk, I will underline the present role of high-precision metrology in our daily life as well as in the search for a new physics by desktop experiments rather than in costly high-energy colliders. I will then present recent progress in fabricating (i) current standards of quantum dots’ charge pumps and (ii) resistance standards, exploiting the quantum Hall effect and quantum anomalous Hall effect, working in magnetic fields low enough to allow for combining with superconducting Josephson junctions that constitute the voltage standard. Such an integrated device establishes the ampere standard and the kilogram standard via the Kibble balance. In the main body of the talk, I will discuss the physics behind a potential role of quantum wells of dilute magnetic semiconductors, such as (Hg,Mn)Te [1] and (Hg,Cr)Te [2], in a new generation of resistance standards.[1] T. Dietl, Phys. Rev. Lett. 130 (2023) 086202; Phys. Rev. B 107 (2023) 085421.[2] C. Śliwa, T. Dietl, arXiv:2310.19856 (2023); G. Cuono, C. Autieri, T. Dietl, arXiv:2312.16732 (2023).