Quasistatic Antiferromagnetism in the Quantum Wells of SmTiO3/SrTiO3 Heterostructures

Published

February 20, 2018

Author(s)

Ryan F. Need, Patrick B. Marshall, Eric Kenney, Andreas Suter, Thomas Prokscha, Zaher Salman, Brian Kirby, Susanne Stemmer, Michael J. Graf, Stephen D. Wilson

Abstract

The magnetic properties of high-density SrTiO₃ quantum wells embedded within the antiferromagnetic Mott insulator SmTiO₃ are explored via muon spin relaxation and polarized neutron reflectometry measurements. The one electron per wel acquired by the nominal d⁾ band insulator SrTiO₃ when embedded within a d¹ Mott SmTiO₃ matrix exhibits slow magnetic fluctuations that begin to freeze into a quasistatic spin state below a critical temperature T^*. The appearance of this quasistatic well magnetism coincides with the previously reported opening of a pseudogap in the tunneling spectra of high carrier density wells inside this film architecture. Our data suggest a common origin of the pseudogap behavior in this behavior in this quantum critical oxide heterostructure with those observed in bulk Mott materials close to an antiferromagnetic instability.

Citation

Nature Partner Journals Quantum Materials

Volume

3

Issue

1

Pub Type

Journals

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Keywords

magnetism, neutron reflectometry, muon spin relaxation

Citation

Need, R. , Marshall, P. , Kenney, E. , Suter, A. , Prokscha, T. , Salman, Z. , Kirby, B. , Stemmer, S. , Graf, M. and Wilson, S. (2018), Quasistatic Antiferromagnetism in the Quantum Wells of SmTiO₃/SrTiO₃ Heterostructures, Nature Partner Journals Quantum Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923458 (Accessed September 30, 2025)