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Quasistatic Antiferromagnetism in the Quantum Wells of SmTiO3/SrTiO3 Heterostructures
Published
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.
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 SmTiO<sub>3</sub>/SrTiO<sub>3</sub> Heterostructures, Nature Partner Journals Quantum Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923458
(Accessed October 12, 2025)