Charge Density Wave in the New Polymorphs of RE2Ru3Ge5 (RE = Pr, Sm, Dy)

Daniel E. Bugaris, Christos D. Malliakas, Fei Han, Nicholas P. Calta, Mihai Sturza, Matthew J. Krogstad, Raymond Osborn, Stephan Rosenkranz, Jacob P.C. Ruff, Giancarlo Trimarchi, Sergey L. Bud’ko, Mahalingam Balasubramanian, Duck Young Chung, Mercouri G. Kanatzidis

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A new polymorph of the RE2Ru3Ge5 (RE = Pr, Sm, Dy) compounds has been grown as single crystals via an indium flux. These compounds crystallize in tetragonal space group P4/mnc with the Sc2Fe3Si5-type structure, having lattice parameters a = 11.020(2) Å and c = 5.853(1) Å for RE = Pr, a = 10.982(2) Å and c = 5.777(1) Å for RE = Sm, and a = 10.927(2) Å and c = 5.697(1) Å for RE = Dy. These materials exhibit a structural transition at low temperature, which is attributed to an apparent charge density wave (CDW). Both the high-temperature average crystal structure and the low-temperature incommensurately modulated crystal structure (for Sm2Ru3Ge5 as a representative) have been solved. The charge density wave order is manifested by periodic distortions of the one-dimensional zigzag Ge chains. From X-ray diffraction, charge transport (electrical resistivity, Hall effect, magnetoresistance), magnetic measurements, and heat capacity, the ordering temperatures (TCDW) observed in the Pr and Sm analogues are ∼200 and ∼175 K, respectively. The charge transport measurement results indicate an electronic state transition happening simultaneously with the CDW transition. X-ray absorption near-edge spectroscopy (XANES) and electronic band structure results are also reported.

Original languageEnglish
Pages (from-to)4130-4143
Number of pages14
JournalJournal of the American Chemical Society
Issue number11
Publication statusPublished - Mar 22 2017

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Charge Density Wave in the New Polymorphs of RE<sub>2</sub>Ru<sub>3</sub>Ge<sub>5</sub> (RE = Pr, Sm, Dy)'. Together they form a unique fingerprint.

Cite this