Response to uniaxial stress has become a major probe of electronic materials. Tuneable uniaxial stress may be applied using piezoelectric actuators, and so far two methods have been developed to couple samples to actuators. In one, actuators apply force along the length of a free, beam-like sample, allowing very large strains to be achieved. In the other, samples are affixed directly to piezoelectric actuators, allowing study of mechanically delicate materials. Here, we describe an approach that merges the two: thin samples are affixed to a substrate, that is then pressurized uniaxially using piezoelectric actuators. Using this approach, we demonstrate application of large elastic strains to mechanically delicate samples: the van der Waals-bonded material FeSe, and a sample of CeAuSb2 that was shaped with a focused ion beam.
@article{arxiv.2003.11444,
title = {Rigid platform for applying large tunable strains to mechanically delicate samples},
author = {Joonbum Park and Jack M. Bartlett and Hilary M. L. Noad and Alexander Stern and Mark E. Barber and Markus König and Suguru Hosoi and Takasada Shibauchi and Andrew P. Mackenzie and Alexander Steppke and Clifford W. Hicks},
journal= {arXiv preprint arXiv:2003.11444},
year = {2020}
}