Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session S40: Emergent Phases in Magnetic Oxides
11:15 AM–2:15 PM,
Thursday, March 7, 2019
BCEC
Room: 208
Sponsoring
Units:
GMAG DMP
Chair: Nandini Trivedi, Ohio State University
Abstract: S40.00001 : Emergent electronic phases in Ruddlesden-Popper chromium oxide perovskites*
11:15 AM–11:51 AM
Presenter:
Riccardo Comin
(Massachusetts Institute of Technology)
Authors:
Riccardo Comin
(Massachusetts Institute of Technology)
Zhihai Zhu
(Massachusetts Institute of Technology)
Jonathan Pelliciari
(Massachusetts Institute of Technology)
Jiarui Li
(Massachusetts Institute of Technology)
Christie Nelson
(Brookhaven National Laboratory)
Low-dimensional perovskites of tetravalent chromium deserve particular attention as they uniquely realize a strongly-correlated electron system with d2 electronic configuration and active spin and orbital degrees of freedom. Antiferromagnetism is ubiquitous in these systems, but recent theoretical studies indicate the presence of proximate electronic phases, including orbital order and superconductivity. These materials cannot be easily stabilized in bulk form and in the Cr4+ oxidation state (with spin S=1) but could host interesting new phenomena enabled by the strong interplay of spin, charge, and orbital degrees of freedom.
To explore these scientific opportunities, we have grown thin films of various members of the Ruddlesden-Popper series of chromium oxide perovskites: SrCrO3, Sr2CrO4, and Sr4Cr3O10. In this talk, I will report on the synthesis and characterization of their transport and magnetic properties, including recent investigations of spin and orbital ordering in the ground state of these materials.
*This work was supported primarily by the MRSEC Program of the National Science Foundation under award number DMR - 1419807.
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