Local orbital degeneracy lifting as a precursor to an orbital-selective Peierls transition

Bozin, Emil S.; Yin, W. G.; Koch, R. J.; Abeykoon, M.; Hor, Y. S.; Zheng, H.; Lei, H. C.; Petrovic, C.; Mitchell, J. F.; Billinge, S. J.  L.

doi:10.1038/s41467-019-11372-w

Title: Local orbital degeneracy lifting as a precursor to an orbital-selective Peierls transition

Journal Article · Tue Aug 13 00:00:00 EDT 2019 · Nature Communications

DOI:https://doi.org/10.1038/s41467-019-11372-w· OSTI ID:1560035

^[1];

^[1]; Koch, R. J. ^[1]; Abeykoon, M. ^[1]; Hor, Y. S. ^[2]; Zheng, H. ^[2]; Lei, H. C. ^[1]; Petrovic, C. ^[1]; Mitchell, J. F. ^[2];

^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)

Fundamental electronic principles underlying all transition metal compounds are the symmetry and filling of the d-electron orbitals and the influence of this filling on structural configurations and responses. Here we use a sensitive local structural technique, x-ray atomic pair distribution function analysis, to reveal the presence of fluctuating local-structural distortions at high temperature in one such compound, CuIr₂S₄. We show that this hitherto overlooked fluctuating symmetry-lowering is electronic in origin and will modify the energy-level spectrum and electronic and magnetic properties. The explanation is a local, fluctuating, orbital-degeneracy-lifted state. The natural extension of our result would be that this phenomenon is likely to be widespread amongst diverse classes of partially filled nominally degenerate d-electron systems, with potentially broad implications for our understanding of their properties.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

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

Grant/Contract Number:: AC02-06CH11357; SC0012704

OSTI ID:: 1560035

Alternate ID(s):: OSTI ID: 1543404; OSTI ID: 1670676

Report Number(s):: BNL-211872-2019-JAAM; BNL-219937-2020-JAAM; 150997

Journal Information:: Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 32 works

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Figures / Tables (3)

Fig. 1(p. 5)

Fig. 2(p. 6)

Fig. 3(p. 7)

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