Significant Dzyaloshinskii–Moriya interaction at graphene–ferromagnet interfaces due to the Rashba effect

Yang, Hongxin; Chen, Gong; Cotta, Alexandre A.  C.; N’Diaye, Alpha T.; Nikolaev, Sergey A.; Soares, Edmar A.; Macedo, Waldemar A.  A.; Liu, Kai; Schmid, Andreas K.; Fert, Albert; Chshiev, Mairbek

doi:10.1038/s41563-018-0079-4

Significant Dzyaloshinskii–Moriya interaction at graphene–ferromagnet interfaces due to the Rashba effect

Journal Article · Mon May 28 00:00:00 EDT 2018 · Nature Materials

DOI:https://doi.org/10.1038/s41563-018-0079-4· OSTI ID:1530366

Yang, Hongxin ^[1]; Chen, Gong ^[2]; ^[3]; ^[4]; Nikolaev, Sergey A. ^[5]; Soares, Edmar A. ^[6]; ^[7]; ^[8]; Schmid, Andreas K. ^[4]; Fert, Albert ^[9]; ^[5]

Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC-SPINTEC, Grenoble (France); Université Paris-Saclay, Palaiseau; Chinese Academy of Sciences, Ningbo (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Davis, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte (Brazil); Universidade Federal de Minas Gerais, Belo Horizonte (Brazil)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC-SPINTEC, Grenoble (France)
Universidade Federal de Minas Gerais, Belo Horizonte (Brazil)
Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte (Brazil)
Univ. of California, Davis, CA (United States)
Université Paris-Saclay, Palaiseau

We report that the possibility of utilizing the rich spin-dependent properties of graphene has attracted much attention in the pursuit of spintronics advances. The promise of high-speed and low-energy-consumption devices motivates the search for layered structures that stabilize chiral spin textures such as topologically protected skyrmions. Here we demonstrate that chiral spin textures are induced at graphene/ferromagnetic metal interfaces. Graphene is a weak spin-orbit coupling material and is generally not expected to induce a sufficient Dzyaloshinskii-Moriya interaction to affect magnetic chirality. We demonstrate that indeed graphene does induce a type of Dzyaloshinskii-Moriya interaction due to the Rashba effect. First-principles calculations and experiments using spin-polarized electron microscopy show that this graphene-induced Dzyaloshinskii-Moriya interaction can have a similar magnitude to that at interfaces with heavy metals. Lastly, this work paves a path towards two-dimensional-material-based spin-orbitronics.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1530366

Journal Information:: Nature Materials, Journal Name: Nature Materials Journal Issue: 7 Vol. 17; ISSN 1476-1122

Publisher:: Springer Nature - Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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