Strain-Modulated Slater-Mott Crossover of Pseudospin-Half Square-Lattice in (SrIrO3)1/(SrTiO3)1 Superlattices

Yang, Junyi; Hao, Lin; Meyers, Derek; Dasa, Tamene; Xu, Liubin; Horak, Lukas; Shafer, Padraic; Arenholz, Elke; Fabbris, Gilberto; Choi, Yongseong; Haskel, Daniel; Karapetrova, Jenia; Kim, Jong-Woo; Ryan, Philip J.; Xu, Haixuan; Batista, Cristian D.; Dean, Mark P.  M.; Liu, Jian

doi:10.1103/PhysRevLett.124.177601

Title: Strain-Modulated Slater-Mott Crossover of Pseudospin-Half Square-Lattice in $({SrIrO}_{3})_{1} / ({SrTiO}_{3})_{1}$ Superlattices

Journal Article · Wed Apr 29 00:00:00 EDT 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.124.177601· OSTI ID:1616751

^[1];

^[1]; Meyers, Derek ^[2]; Dasa, Tamene ^[1]; Xu, Liubin ^[1]; Horak, Lukas ^[3]; Shafer, Padraic ^[4]; Arenholz, Elke ^[5];

^[6];

^[6]; Haskel, Daniel ^[6]; Karapetrova, Jenia ^[6]; Kim, Jong-Woo ^[6]; Ryan, Philip J. ^[6]; Xu, Haixuan ^[1]; Batista, Cristian D. ^[1];

^[7];

^[1]

Univ. of Tennessee, Knoxville, TN (United States)
Oklahoma State Univ., Stillwater, OK (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Charles Univ., Prague (Czech Republic)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of California, Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Here, we report on the epitaxial strain-driven electronic and antiferromagnetic modulations of a pseudospin-half square lattice realized in superlattices of (SrIrO₃)₁/(SrTiO₃)1. With increasing compressive strain, we find the low-temperature insulating behavior to be strongly suppressed with a corresponding systematic reduction of both the Néel temperature and the staggered moment. However, despite such a suppression, the system remains weakly insulating above the Néel transition. The emergence of metallicity is observed under large compressive strain but only at temperature far above the Néel transition. These behaviors are characteristics of the Slater-Mott crossover regime, providing a unique experimental model system of the spin-half Hubbard Hamiltonian with a tunable intermediate coupling strength.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS) and Center for Nanoscale Materials (CNM); Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Grant Agency of the Czech Republic; State of Tennessee; Tennessee Higher Education Commission (THEC); European Regional Development Fund (ERDF); Czech Science Foundation (GACR)

Grant/Contract Number:: AC02-06CH11357; DMR-1848269; 14-37427 G; AC02-05CH11231; SC0012704

OSTI ID:: 1616751

Alternate ID(s):: OSTI ID: 1633029; OSTI ID: 1775382

Report Number(s):: BNL-216012-2020-JAAM; PRLTAO; 157110; TRN: US2106662

Journal Information:: Physical Review Letters, Vol. 124, Issue 17; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Title: Strain-Modulated Slater-Mott Crossover of Pseudospin-Half Square-Lattice in ( SrIrO 3 ) 1 / ( SrTiO 3 ) 1 Superlattices

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Title: Strain-Modulated Slater-Mott Crossover of Pseudospin-Half Square-Lattice in $({SrIrO}_{3})_{1} / ({SrTiO}_{3})_{1}$ Superlattices