Uniaxial stress dependence of the Fermi surface of Ru

Abstract

Simultaneous measurements of quantum oscillations in magnetostriction and torque in a single crystal of ruthenium have been used to determine the derivative with respect to tensile stress along the hexad crystal axis of the central cross section, normal to that axis, of the hole sheet of the Fermi surface in zone 10. The uniaxial stress derivative delta lnA/ delta sigma 3=-(3.6+or-1.0)*10-12 cm2 dyn-1, is found to be an order of magnitude larger than the corresponding hydrostatic pressure derivative. The Fermi surface is therefore strongly influenced by distortion of the hexagonal crystal axial ratio.