Anisotropic and High-Mobility Electronic Transport in a Quasi 2D Antiferromagnet NdSb2

Ratnadwip Singha, Fang Yuan, Scott B. Lee, Graciela V. Villalpando, Guangming Cheng, Birender Singh, Suchismita Sarker, Nan Yao, Kenneth S. Burch, Leslie M. Schoop

Research output: Contribution to journalArticlepeer-review

Abstract

Advancements in low-dimensional functional device technology heavily rely on the discovery of suitable materials which have interesting physical properties as well as can be exfoliated down to the 2D limit. Exfoliable high-mobility magnets are one such class of materials that, not due to lack of effort, has been limited to only a handful of options. So far, most of the attention has been focused on the van der Waals (vdW) systems. However, even within the non-vdW, layered materials, it is possible to find all these desirable features. Using chemical reasoning, it is found that NdSb2 is an ideal example. Even with a relatively small interlayer distance, this material can be exfoliated down to few layers. NdSb2 has an antiferromagnetic ground state with a quasi 2D spin arrangement. The bulk crystals show a very large, non-saturating magnetoresistance along with highly anisotropic electronic transport properties. It is confirmed that this anisotropy originates from the 2D Fermi pockets which also imply a rather quasi 2D confinement of the charge carrier density. Both electron and hole-type carriers show very high mobilities. The possible non-collinear spin arrangement also results in an anomalous Hall effect.

Original languageEnglish (US)
Article number2308733
JournalAdvanced Functional Materials
Volume34
Issue number10
DOIs
StatePublished - Mar 4 2024

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

Keywords

  • anomalous Hall effect
  • antiferromagnetism
  • high-mobility charge carriers
  • low-dimensional magnet
  • magnetoresistance

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