journal article·2024-08-20

Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin–Orbit Torque

Alexander Vera, Boyang Zheng, Wilson Yanez, Kaijie Yang, Seong Yeoul Kim, Xinglu Wang, Jimmy C. Kotsakidis, Hesham El-Sherif, Gopi Krishnan, Roland J. Koch, T. Andrew Bowen, Chengye Dong, Yuanxi Wang, Maxwell Wetherington, Eli Rotenberg, Nabil Bassim, Adam L. Friedman, Robert M. Wallace, Chaoxing Liu, Nitin Samarth, Vincent H. Crespi, Joshua A. Robinson

ACS Nano· Volume 18· Issue 33
Publisher page

Abstract

A scalable platform to synthesize ultrathin heavy metals may enable high-efficiency charge-to-spin conversion for next-generation spintronics. Here, we report the synthesis of air-stable, epitaxially registered monolayer Pb underneath graphene on SiC (0001) by confinement heteroepitaxy (CHet). Diffraction, spectroscopy, and microscopy reveal that CHet-based Pb intercalation predominantly exhibits a mottled hexagonal superstructure due to an ordered network of Frenkel–Kontorova-like domain walls. The system’s air stability enables ex situ spin torque ferromagnetic resonance (ST-FMR) measurements that demonstrate charge-to-spin conversion in graphene/Pb/ferromagnet heterostructures with a 1.5× increase in the effective field ratio compared to control samples.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Graphene research and applications · Quantum and electron transport phenomena · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, The Pennsylvania State University, University Park ,Pennsylvania 16802, United States

Center for Nanoscale Science, The Pennsylvania State University, University Park ,Pennsylvania 16802, United States

Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

2-Dimensional Crystal Consortium, The Pennsylvania State University, University Park ,Pennsylvania 16802, United States

Department of Materials Science and Engineering, The University of Texas at Dallas, Dallas ,Texas 75080, United States

Laboratory for Physical Sciences, College Park, College Park ,Maryland 20740, United States

Department of Materials Science and Engineering, McMaster University, Hamilton ,Ontario L8S 4L8, Canada

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States

Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park ,Pennsylvania 16802, United States

Materials Research Institute, The Pennsylvania State University, University Park ,Pennsylvania 16802, United States

Canadian Centre for Electron Microscopy, McMaster University, Hamilton ,Ontario L8S 4M1, Canada

Funding

National Science Foundation Graduate Research Fellowship Program · Canada Foundation for Innovation · Air Force Office of Scientific Research · Alfred P. Sloan Foundation · Division of Materials Research

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