Itinerant density wave instabilities at classical and quantum critical points

doi:10.1038/NPHYS3416

Title: Itinerant density wave instabilities at classical and quantum critical points

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Charge ordering in metals is a fundamental instability of the electron sea, occurring in a host of materials and often linked to other collective ground states such as superconductivity. What is difficult to parse, however, is whether the charge order originates among the itinerant electrons or whether it arises from the ionic lattice. Here in this study we employ high-resolution X-ray diffraction, combined with high-pressure and low-temperature techniques and theoretical modelling, to trace the evolution of the ordering wavevector Q in charge and spin density wave systems at the approach to both thermal and quantum phase transitions. The non-monotonic behaviour of Q with pressure and the limiting sinusoidal form of the density wave point to the dominant role of the itinerant instability in the vicinity of the critical points, with little influence from the lattice. Fluctuations rather than disorder seem to disrupt coherence.

Authors:

Feng, Yejun ^[1] ; van Wezel, Jasper ^[2] ; Wang, Jiyang ^[3] ; Flicker, Felix ^[4] ; Silevitch, D. M. ^[3] ; Littlewood, P. B. ^[5] ; Rosenbaum, T. F. ^[6]

Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Univ. of Chicago, IL (United States). James Franck Inst. and Dept. of Physics
Univ. of Amsterdam (Netherlands). Inst. for Theoretical Physics
Univ. of Chicago, IL (United States). James Franck Inst. and Dept. of Physics
Univ. of Bristol (United Kingdom). H. H.Wills Physics Lab.
Univ. of Chicago, IL (United States). James Franck Inst. and Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Physical Sciences and Engineering
Univ. of Chicago, IL (United States). James Franck Inst. and Dept. of Physics; California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Physics, Mathematics, and Astronomy

Publication Date:: 2015-07-27

Grant/Contract Number:: AC02-06CH11357

Type:: Accepted Manuscript

Journal Name:: Nature Physics

Additional Journal Information:: Journal Volume: 11; Journal Issue: 10; Journal ID: ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)

Research Org:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Netherlands Organization for Scientific Research (NWO)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

OSTI Identifier:: 1237950


                    Feng, Yejun, van Wezel, Jasper, Wang, Jiyang, Flicker, Felix, Silevitch, D. M., Littlewood, P. B., and Rosenbaum, T. F.. Itinerant density wave instabilities at classical and quantum critical points.  United States: N. p.,  
        Web.  doi:10.1038/NPHYS3416.

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                    Feng, Yejun, van Wezel, Jasper, Wang, Jiyang, Flicker, Felix, Silevitch, D. M., Littlewood, P. B., & Rosenbaum, T. F.. Itinerant density wave instabilities at classical and quantum critical points.  United States.  doi:10.1038/NPHYS3416.

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                    Feng, Yejun, van Wezel, Jasper, Wang, Jiyang, Flicker, Felix, Silevitch, D. M., Littlewood, P. B., and Rosenbaum, T. F.. 2015.  
        "Itinerant density wave instabilities at classical and quantum critical points".  United States.  
        doi:10.1038/NPHYS3416.  https://www.osti.gov/servlets/purl/1237950.

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@article{osti_1237950,

  title        = {Itinerant density wave instabilities at classical and quantum critical points},

  author       = {Feng, Yejun and van Wezel, Jasper and Wang, Jiyang and Flicker, Felix and Silevitch, D. M. and Littlewood, P. B. and Rosenbaum, T. F.},

  abstractNote = {Charge ordering in metals is a fundamental instability of the electron sea, occurring in a host of materials and often linked to other collective ground states such as superconductivity. What is difficult to parse, however, is whether the charge order originates among the itinerant electrons or whether it arises from the ionic lattice. Here in this study we employ high-resolution X-ray diffraction, combined with high-pressure and low-temperature techniques and theoretical modelling, to trace the evolution of the ordering wavevector Q in charge and spin density wave systems at the approach to both thermal and quantum phase transitions. The non-monotonic behaviour of Q with pressure and the limiting sinusoidal form of the density wave point to the dominant role of the itinerant instability in the vicinity of the critical points, with little influence from the lattice. Fluctuations rather than disorder seem to disrupt coherence.},

  doi          = {10.1038/NPHYS3416},

  journal      = {Nature Physics},

  number       = 10,

  volume       = 11,

  place        = {United States},

  year         = {2015},

  month        = {7}

}

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10.1038/NPHYS3416
https://doi.org/10.1038/NPHYS3416

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Title: Itinerant density wave instabilities at classical and quantum critical points

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