title: Charge Density Wave in the New Polymorphs of RE2Ru3Ge5(RE = Pr, Sm, Dy).
abstract: 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 Sm2Ru3Ge5as 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.
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Daniel E
authors.identifier: 0000-0002-9504-2339
authors.initials: DE
authors.lastname: Bugaris
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.|Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Christos D
authors.identifier: 0000-0003-4416-638X
authors.initials: CD
authors.lastname: Malliakas
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Fei
authors.initials: F
authors.lastname: Han
authors.affiliation: Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Calta
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.|Leibniz Institute for Solid State and Materials Research Dresden IFW, Institute for Solid State Research , 01069 Dresden, Germany.
authors.forename: Mihai
authors.initials: M
authors.lastname: Sturza
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.|Department of Physics, Northern Illinois University , DeKalb, Illinois 60115, United States.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Krogstad
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Raymond
authors.initials: R
authors.lastname: Osborn
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Stephan
authors.initials: S
authors.lastname: Rosenkranz
authors.affiliation: Cornell High Energy Synchrotron Source, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Jacob P C
authors.initials: JP
authors.lastname: Ruff
authors.affiliation: Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Trimarchi
authors.affiliation: Division of Materials Science & Engineering, Ames Laboratory, and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.
authors.forename: Sergey L
authors.initials: SL
authors.lastname: Bud'ko
authors.affiliation: X-ray Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Mahalingam
authors.initials: M
authors.lastname: Balasubramanian
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Duck Young
authors.initials: DY
authors.lastname: Chung
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.|Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Mercouri G
authors.identifier: 0000-0003-2037-4168
authors.initials: MG
authors.lastname: Kanatzidis
mesh_terms: D055590:Electromagnetic Phenomena; D005857:Germanium / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D011789:Quantum Theory; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D028581:Lanthanoid Series Elements; D005857:Germanium; D012428:Ruthenium