Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

Yumnam, George; Guo, Jiasen; Chen, Yiyao; Dahal, Ashutosh; Ghosh, Pousali; Cunningham, Quinn; Keum, Jong; Lauter, Valeria; Abdullah, Amjed; Almasri, Mahmoud; Singh, Deepak K.

doi:10.1016/j.mtphys.2021.100574

Title: Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

Journal Article · Thu Nov 18 00:00:00 EST 2021 · Materials Today Physics

DOI:https://doi.org/10.1016/j.mtphys.2021.100574· OSTI ID:1883679

^[1]; Guo, Jiasen ^[1];

^[1]; Dahal, Ashutosh ^[1]; Ghosh, Pousali ^[1]; Cunningham, Quinn ^[1];

^[2];

^[2]; Abdullah, Amjed ^[1]; Almasri, Mahmoud ^[1]; Singh, Deepak K. ^[1]

University of Missouri, Columbia, MO (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report spin diode is important prerequisite to practical manifestation of spin electronics. Yet, a functioning magnetic diode at room temperature is still illusive. Here, we reveal diode-type phenomena due to magnetic charge mediated conduction in artificial honeycomb geometry, made of concave shape single domain permalloy element. We find that honeycomb lattice defies symmetry by populating vertices with low and high multiplicity magnetic charges, causing asymmetric magnetization, in applied current of opposite polarity. High multiplicity units create highly resistive network, thereby inhibiting magnetic charge dynamics propelled electrical conduction. However, practical realization of this effect requires modest demagnetization factor in constituting element. Concave structure fulfills the condition. Subsequently, magnetic diode behavior emerges across broad thermal range of T = 40 K–300 K. The finding is a departure from the prevailing notion of spin-charge interaction as the sole guiding principle behind spintronics. Consequently, a new vista, mediated by magnetic charge interaction, is envisaged for spintronic research.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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

Grant/Contract Number:: AC05-00OR22725; SC0014461

OSTI ID:: 1883679

Alternate ID(s):: OSTI ID: 1862721

Journal Information:: Materials Today Physics, Vol. 22, Issue N/A; ISSN 2542-5293

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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