Hall Coefficient of Pure Chromium at Finite Temperatures and High Pressures

Elemental chromium is a spin density wave antiferromagnet which may be tuned through a second order quantum phase transition by the application of pressure or by chemical doping with e.g. vanadium. For both routes, the Hall coefficient has proven to be a powerful probe of the quantum critical region. In the low temperature limit, the Hall coefficient varies rapidly through the transition due to Fermi surface reconstruction. However, critical scaling of the Hall coefficient differs between pressure and doping driven transitions, establishing disorder as a relevant parameter in defining the universality class of a quantum phase transition. For doped chromium, the measured finite temperature behavior of the Hall coefficient cannot be described by band theory, and instead has been interpreted as evidence of a pseudogap phase. Here, we examine the pressure-driven Hall coefficient in pure chromium at finite temperature in search of signatures of a pseudogap phase in the absence of disorder.