Elastic neutron scattering in Quantum Critical Antiferromagnet Cr$_{0.963}$V$_{0.037}$

TL;DR

This study uses elastic neutron scattering to explore how V doping alters the magnetic ordering and Fermi surface nesting in the quantum critical antiferromagnet Cr$_{0.963}$V$_{0.037}$, revealing complex magnetic behavior.

Contribution

It demonstrates that V doping introduces additional magnetic wavevectors and modifies Fermi surface nesting without lowering the Neel temperature.

Findings

Cr$_{0.963}$V$_{0.037}$ orders at four incommensurate and one commensurate wavevectors

Strong temperature-dependent scattering observed below 250 K

V doping primarily affects Fermi surface nesting, not Neel temperature

Abstract

We have performed elastic neutron scattering studies of the quantum critical antiferromagnet Cr$_{0.963}$V$_{0.037}$. We have found that unlike pure Cr, which orders at two incommensurate wavevectors, Cr$_{0.963}$V$_{0.037}$ orders at four incommensurate and one commensurate wavevectors. We have found strong temperature dependent scattering at the commensurate and incommensurate wavevectors below 250 K. Results indicate that the primary effect of V doping on Cr is the modification of the nesting conditions of the Fermi surface and not the decreasing of the Neel temperature.