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Preprint (Author's original)CC BY V4.0, Open Access
Journal article
Spin and charge interconversion in Dirac semimetal thin films
Physical review applied, Vol.16(5), 054031
16/Nov/2021
Abstract
We report spin-to-charge and charge-to-spin conversion at room temperature in heterostructure devices that interface an archetypal Dirac semimetal, Cd3As2, with a metallic ferromagnet, Ni0.80Fe0.20 (permalloy). The spin-charge interconversion is detected by both spin torque ferromagnetic resonance and ferromagnetic resonance driven spin pumping. Analysis of the symmetric and anti-symmetric components of the mixing voltage in spin torque ferromagnetic resonance and the frequency and power dependence of the spin pumping signal show that the behavior of these processes is consistent with previously reported spin-charge interconversion mechanisms in heavy metals, topological insulators, and Weyl semimetals. We find that the efficiency of spin-charge interconversion in Cd3As2/permalloy bilayers can be comparable to that in heavy metals. We discuss the underlying mechanisms by comparing our results with first principles calculations.
Details
- Title
- Spin and charge interconversion in Dirac semimetal thin films
- Creators
- Wilson YanezYongxi OuRun XiaoJahyun Koo - 972WIS_INST___90Jacob T HeldSupriya Ghosh - University of PittsburghJeffrey RableTimothy PillsburyEnrique Gonzalez Delgado - University of Puerto Rico at HumacaoKezhou YangJuan ChamorroAlexander J GrutterPatrick QuartermanAnthony Richardella - Pennsylvania State UniversityAbhronil SenguptaTyrel McQueenJulie A BorchersK. Andre MkhoyanBinghai Yan - 972WIS_INST___90Nitin Samarth - Pennsylvania State University
- Resource Type
- Journal article
- Publication Details
- Physical review applied, Vol.16(5), 054031; 16/Nov/2021
- Number of pages
- 15
- Language
- English
- DOI
- https://doi.org/10.1103/PhysRevApplied.16.054031
- Grant note
- The principal support for this project was provided by SMART, one of seven centers of nCORE, a Semiconductor Research Corporation program, sponsored by the National Institute of Standards and Technology (NIST). This supported the synthesis and standard characterization of Py/Cd3As2 heterostructures as well as spin-charge interconversion measurements (WY, YO, NS) and their characterization using STEM (JH, SG, AM). Additional support for materials synthesis was provided by the Institute for Quantum Matter under DOE EFRC grant DE-SC0019331 (RX, JC, NS, TM). The Penn State Two-Dimensional Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF Grant No. DMR-1539916 provided support for ARPES measurements (YO, TP, AR, NS). The magnetometry measurements were carried out by JR, supported by a grant from the University of Chicago. Part of this work was carried out in the College of Science and Engineering Characterization Facility, University of Minnesota, which has received capital equipment funding from the National Science Foundation through the UMN MRSEC under Award Number DMR-2011401 (JH, SG, AM). EG acknowledges support for an undergraduate summer internship from the Office of Graduate Educational Equity Programs and Eberly College of Science at the Pennsylvania State University. B.Y. acknowledges the financial support by the European Research Council (ERC Consolidator Grant No. 815869). Certain commercial equipment, instruments, or materials (or suppliers, or software, etc.) are identified in this paper to foster understanding. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.
- Alternative title
- Spin and Charge Interconversion in Dirac-Semimetal Thin Films
- Record Identifier
- 993280983103596
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