Anomalous Hall effect at the spontaneously electron-doped polar surface of PdCo O2 ultrathin films

T. Harada, K. Sugawara, K. Fujiwara, M. Kitamura, S. Ito, T. Nojima, K. Horiba, H. Kumigashira, T. Takahashi, T. Sato, A. Tsukazaki

Research output: Contribution to journalArticlepeer-review

Abstract

We revealed the electrical transport through surface ferromagnetic states of a nonmagnetic metal PdCoO2. Electronic reconstruction at the Pd-terminated surface of PdCoO2 induces Stoner-like ferromagnetic states, which could lead to spin-related phenomena among the highly conducting electrons in PdCoO2. Fabricating a series of nanometer-thick PdCoO2 thin films, we detected a surface-magnetization-driven anomalous Hall effect via systematic thickness- A nd termination-dependent measurements. Besides, we discuss that finite magnetic moments in electron doped CoO2 triangular lattices may have given rise to additional unconventional Hall resistance.

Original languageEnglish
Article number013282
JournalPhysical Review Research
Volume2
Issue number1
DOIs
Publication statusPublished - 2020 Mar

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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