NSF PAR Search | NSF Public Access Repository

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

Current-sensitive Hall effect in a chiral-orbital-current state

https://doi.org/10.1038/s41467-024-47823-2

Zhang, Yu; Ni, Yifei; Schlottmann, Pedro; Nandkishore, Rahul; DeLong, Lance E.; Cao, Gang (April 2024, Nature Communications)

Abstract Chiral orbital currents (COC) underpin a novel colossal magnetoresistance in ferrimagnetic Mn₃Si₂Te₆. Here we report the Hall effect in the COC state which exhibits the following unprecedented features: (1) A sharp, current-sensitive peak in the magnetic field dependence of the Hall resistivity, and (2) A current-sensitive scaling relation between the Hall conductivityσ_xyand the longitudinal conductivityσ_xx, namely,σ_xy∝σ_xx^αwith α reaching up to 5, which is exceptionally large compared toα ≤ 2 typical of all solids. The novel Hall responses along with a current-sensitive carrier density and a large Hall angle of 15% point to a giant, current-sensitive Hall effect that is unique to the COC state. Here, we show that a magnetic field induced by the fully developed COC combines with the applied magnetic field to exert the greatly enhanced transverse force on charge carriers, which dictates the COC Hall responses.
more » « less
Control of chiral orbital currents in a colossal magnetoresistance material

https://doi.org/10.1038/s41586-022-05262-3

Zhang, Yu; Ni, Yifei; Zhao, Hengdi; Hakani, Sami; Ye, Feng; DeLong, Lance; Kimchi, Itamar; Cao, Gang (November 2022, Nature)

Full Text Available
Persistent insulating state at megabar pressures in strongly spin-orbit coupled $S r_{2} Ir O_{4}$

https://doi.org/10.1103/PhysRevB.101.144102

Chen, Chunhua; Zhou, Yonghui; Chen, Xuliang; Han, Tao; An, Chao; Zhou, Ying; Yuan, Yifang; Zhang, Bowen; Wang, Shuyang; Zhang, Ranran; et al (April 2020, Physical Review B)

Full Text Available

Search for: All records