Crystal structure of the inversion-breaking metal Cd2Re2O7

Norman, M. R.

doi:10.1103/PhysRevB.101.045117

Title: Crystal structure of the inversion-breaking metal ${Cd}_{2} {Re}_{2} O_{7}$

Journal Article · 13 January 2020 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.101.045117 · OSTI ID:1582583

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Argonne National Lab. (ANL), Argonne, IL (United States)

Second harmonic generation (SHG) on the pyrochlore metal Cd₂Re₂O₇ indicates the presence of three order parameters setting in below an inversion breaking transition. Here, we explore a possible structural explanation and relate it not only to the SHG data but also to neutron and x-ray diffraction, where we find that such a structural scenario can explain certain reflection extinctions observed in single crystal x-ray data. From this analysis, we suggest future experiments that could be done to resolve this matter. Lastly, we comment on the Landau-violating nature of the inversion breaking transition and its relation to similar phenomena observed in improper ferroelectrics.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1582583

Journal Information:: Physical Review B, Vol. 101, Issue 4; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (26)

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Title: Crystal structure of the inversion-breaking metal ${Cd}_{2} {Re}_{2} O_{7}$