Anomalous proximitized transport in metal/quantum magnet heterostructure Bi2Ir2O7/Yb2Ti2O7

Xing, Chengkun; Zhang, Shu; Yao, Weiliang; Cui, Dapeng; Huang, Qing; Yang, Junyi; Pandey, Shashi; Gong, Dongliang; Horák, Lukas; Xin, Yan; Choi, Eun Sang; Zhang, Yang; Zhou, Haidong; Liu, Jian

doi:10.1103/physrevmaterials.8.114407

Title: Anomalous proximitized transport in metal/quantum magnet heterostructure Bi₂Ir₂O₇/Yb₂Ti₂O₇

Journal Article · 05 November 2024 · Physical Review Materials

DOI: https://doi.org/10.1103/physrevmaterials.8.114407 · OSTI ID:2476850

Xing, Chengkun ^[1]; Zhang, Shu ^[2]; Yao, Weiliang ^[3];

^[3]; Huang, Qing ^[3]; Yang, Junyi ^[3]; Pandey, Shashi ^[3];

^[3];

^[4]; Xin, Yan ^[5]; Choi, Eun Sang ^[5]; Zhang, Yang ^[3]; Zhou, Haidong ^[3]; Liu, Jian ^[3]

University of Tennessee, Knoxville, TN (United States); University of Tennessee
Max-Planck-Institut für Physik Komplexer Systeme, Dresden (Germany)
University of Tennessee, Knoxville, TN (United States)
Charles University, Prague (Czech Republic)
Florida State University, Tallahassee, FL (United States)

Fluctuations of quantum spins play a crucial role in the emergence of exotic magnetic phases and excitations. The lack of the charge degree of freedom in insulating quantum magnets, however, precludes such fluctuations from mediating electronic transport. Here, we show that the quantum fluctuations of a localized frustrated magnet induce strong proximitized charge transport of the conduction electrons in a synthetic heterostructure comprising an epitaxial Bi₂Ir₂O₇ ultrathin film on a single crystal of Yb₂Ti₂O₇. The proximity effects are evidenced by the scaling behavior of the Bi₂Ir₂O₇ resistance in correspondence with the dynamic scaling of the dynamic spincorrelation function of Yb₂Ti₂O₇, which is a result of quantum fluctuations near a multiphase quantum critical point. The proximitized transport in Bi₂Ir₂O₇ can be effectively tuned by a magnetic field through suppressing the quantum spin fluctuations (QSFs) as well as inducing transitions via magnetic anisotropy in Yb₂Ti₂O₇. In this study, we establish a pathway for harnessing QSFs in magnetic insulators with electric transport, offering exciting prospects for potential applications in the realm of quantum spintronics.

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Research Organization:: University of Tennessee, Knoxville, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)

Grant/Contract Number:: SC0020254; AC02-06CH11357

OSTI ID:: 2476850

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 11 Vol. 8; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Anomalous proximitized transport in metal/quantum magnet heterostructure Bi2Ir2O7/Yb2Ti2O7

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Title: Anomalous proximitized transport in metal/quantum magnet heterostructure Bi₂Ir₂O₇/Yb₂Ti₂O₇