Charge density wave with anomalous temperature dependence in UPt2Si2

Physical review. B./Physical review. B, vol. 102

Abstract

Using single-crystal neutron and x-ray diffraction, we discovered a charge density wave (CDW) below 320 K, which accounts for the long-sought origin of the heat capacity and resistivity anomalies in ${\mathrm{UPt}}_{2}{\mathrm{Si}}_{2}$. The modulation wave vector, ${\mathbit{Q}}_{\mathrm{mod}}$, is intriguingly similar to the incommensurate wave vector of ${\mathrm{URu}}_{2}{\mathrm{Si}}_{2}$. ${\mathbit{Q}}_{\mathrm{mod}}$ shows an unusual temperature dependence, shifting from commensurate to incommensurate position upon cooling and becoming locked at aproximately (0.42 0 0) near 180 K. Bulk measurements indicate a crossover toward a correlated coherent state around the same temperature, suggesting an interplay between the CDW and Kondo-lattice-like coherence before coexisting antiferromagnetic order sets in at ${T}_{\mathrm{N}}=35$ K.

Authors 14

1. Jooseop Lee

   Cornell University · Institute for Basic Science

   Affiliation as printed

   CALDES, Institute for Basic Science, Pohang 37673, Republic of Korea

   CHESS, Cornell University, Ithaca, New York 14853, USA

2. Karel Prokes

   Helmholtz-Zentrum Berlin für Materialien und Energie

   Affiliation as printed

   Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin 14109, Germany

3. Sohee Park

   Institute for Basic Science

   Affiliation as printed

   CALDES, Institute for Basic Science, Pohang 37673, Republic of Korea

4. Igor A. Zaliznyak

   Brookhaven National Laboratory

   Affiliation as printed

   CMPMSD, Brookhaven National Laboratory, Upton, New York 11973, USA

5. Sachith Dissanayake

   Oak Ridge National Laboratory

   Affiliation as printed

   Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

6. Masaaki Matsuda

   Oak Ridge National Laboratory

   Affiliation as printed

   Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

7. Matthias Frontzek

   Oak Ridge National Laboratory

   Affiliation as printed

   Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

8. Stanislav Stoupin

   Cornell University

   Affiliation as printed

   CHESS, Cornell University, Ithaca, New York 14853, USA

9. Greta Chappell

   Florida State University · National High Magnetic Field Laboratory

   Affiliation as printed

   Department of Physics, Florida State University, Tallahassee, Florida 32306, USA

   National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA

10. Ryan Baumbach

    Florida State University · National High Magnetic Field Laboratory

    Affiliation as printed

    Department of Physics, Florida State University, Tallahassee, Florida 32306, USA

    National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA

11. Changwon Park

    Institute for Basic Science

    Affiliation as printed

    CALDES, Institute for Basic Science, Pohang 37673, Republic of Korea

12. John A. Mydosh Aachen Institute Lorentz and Kamerlingh Onnes Laboratory

    Leiden University

    Affiliation as printed

    Institute Lorentz and Kamerlingh Onnes Laboratory, Leiden University, Leiden 2300 RA, The Netherlands

13. Garrett E. Granroth

    Oak Ridge National Laboratory

    Affiliation as printed

    Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

14. Jacob P. C. Ruff

    Cornell University

    Affiliation as printed

    CHESS, Cornell University, Ithaca, New York 14853, USA