Field and Current Control of the Electrical Conductivity of an Artificial 2D Honeycomb Lattice

Yiyao Chen; Brock Summers; Ashutosh Dahal; Valeria Lauter; Giovanni Vignale; Deepak K. Singh

doi:10.1002/adma.201808298

Field and Current Control of the Electrical Conductivity of an Artificial 2D Honeycomb Lattice

Yiyao Chen, Brock Summers, Ashutosh Dahal, Valeria Lauter, Giovanni Vignale, Deepak K. Singh

Reflectometry

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The conductivity of a neodymium-based artificial honeycomb lattice undergoes dramatic changes upon application of magnetic fields and currents. These changes are attributed to a redistribution of magnetic charges that are formed at the vertices of the honeycomb due to the nonvanishing net flux of magnetization from adjacent magnetic elements. It is suggested that the application of a large magnetic field or a current causes a transition from a disordered state, in which magnetic charges are distributed at random, to an ordered state, in which they are regularly arranged on the sites of two interpenetrating triangular Wigner crystals. The field and current tuning of electrical properties are highly desirable functionalities for spintronics applications. Consequently, a new spintronics research platform can be envisaged using artificial magnetic honeycomb lattices.

Original language	English
Article number	1808298
Journal	Advanced Materials
Volume	31
Issue number	16
DOIs	https://doi.org/10.1002/adma.201808298
State	Published - Apr 19 2019

Funding

Y.C., B.S., and A.D. contributed equally to this work. D.K.S thankfully acknowledges support from the U.S. Department of Energy, Office of Basic Energy Sciences under Grant No. DE-SC0014461. The research conducted at ORNL’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, and US Department of Energy. Y.C., B.S., and A.D. contributed equally to this work. D.K.S thankfully acknowledges support from the U.S. Department of Energy, Office of Basic Energy Sciences under Grant No. DE-SC0014461. The research conducted at ORNL's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, and US Department of Energy.

Funders	Funder number
ORNL’s
Office of Basic Energy Sciences
Scientific User Facilities Division
US Department of Energy
U.S. Department of Energy
Basic Energy Sciences	DE-SC0014461

Keywords

artificial magnetic honeycomb lattice
colossal electrical conductance
magnetic charge
spintronics
wigner Crystal

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10.1002/adma.201808298

Cite this

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Field and Current Control of the Electrical Conductivity of an Artificial 2D Honeycomb Lattice

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