Mooij Law Violation from Nanoscale Disorder

Aifeng Wang, Lijun Wu, Qianheng Du, Muntaser Naamneh, Walber Hugo Brito, Am Milinda Abeykoon, Wojciech Radoslaw Pudelko, Jasmin Jandke, Yu Liu, Nicholas C. Plumb, Gabriel Kotliar, Vladimir Dobrosavljevic, Milan Radovic, Yimei Zhu, Cedomir Petrovic

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Nanoscale inhomogeneity can profoundly impact properties of two-dimensional van der Waals materials. Here, we reveal how sulfur substitution on the selenium atomic sites in Fe1-ySe1-xSx(0 ≤ x ≤ 1, y ≤ 0.1) causes Fe-Ch (Ch = Se, S) bond length differences and strong disorder for 0.4 ≤ x ≤ 0.8. There, the superconducting transition temperature Tcis suppressed and disorder-related scattering is enhanced. The high-temperature metallic resistivity in the presence of strong disorder exceeds the Mott limit and provides an example of the violation of Matthiessen's rule and the Mooij law, a dominant effect when adding moderate disorder past the Drude/Matthiessen's regime in all materials. The scattering mechanism responsible for the resistivity above the Mott limit is unrelated to phonons and arises for strong Se/S atom disorder in the tetrahedral surrounding of Fe. Our findings shed light on the intricate connection between the nanostructural details and the unconventional scattering mechanism, which is possibly related to charge-nematic or magnetic spin fluctuations.

Original languageEnglish
Pages (from-to)6900-6906
Number of pages7
JournalNano Letters
Volume22
Issue number17
DOIs
StatePublished - 14 Sep 2022

Keywords

  • defects
  • disorder
  • electrical transport
  • superconductivity

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering

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