Abstract
Quantum oscillations measurements on PdCrO${}_{2}$ show that the Fermi surface of the antiferromagnetically ordered state is a consequence of reconstruction of the Fermi surface of the unordered state.
Highlights
We report quantum oscillation data on the metallic triangular antiferromagnet PdCrO2
To very high accuracy, the observed frequencies of PdCrO2 can be reproduced by reconstruction of the PdCoO2 Fermi surface int√o a re√duced zone
We present measurements of quantum oscillations in PdCrO2, and confirm the overall frequencies reported in Ref. [14]
Summary
We report quantum oscillation data on the metallic triangular antiferromagnet PdCrO2. A prominent example is the insulating CrO2 sheet, stabilized in materials such as LiCrO2 and PdCrO2. In these compounds, the Cr formal charge is +3, and its configuration is 3d3. Of materials containing such a CrO2 sheet, AgCrO2, CuCrO2, and PdCrO2 have the delafossite crystal structure, while LiCrO2, NaCrO2, and KCrO2 have the closely related ordered rock salt structure. The ordered rock-salt structure gives substantially smaller interplane spacings than the delafossite structure, and somewhat higher Neel temperatures [1]
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