I agree that the setup is not satisfactorily documented. > but what equipment? But at least this individual question is actually included in the paper. It was

I agree that the setup is not satisfactorily documented. > but what equipment? But at least this individual question is actually included in the paper. It was the Physical Property Measurement System (PPMS), manufactured by Quantum Design Inc. From the photo, one can clearly see that the DC resistance test fixture was used. https://www.qdusa.com/products/ppms.html https://www.qdusa.com/products/ppms.html