Abstract
In the prototypical heavy-fermion system , a magnetic quantum critical point can be tuned by Au concentration , hydrostatic pressure , or magnetic field . A striking equivalence of the tuning behavior with or had been found with respect to thermodynamic and transport properties. By means of elastic neutron scattering on single crystalline , we demonstrate this equivalence on a microscopic level by showing that the magnetic ordering wave vector can be tuned accordingly. At ambient pressure, orders at . Upon applying , is found corresponding to at ambient pressure. The transition seems to occur in a first-order fashion and to be governed by slight changes in the nesting properties of the Fermi surface.
- Received 14 November 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.096404
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