Thermodynamics of emergent magnetic charge screening in artificial spin ice

Farhan, Alan; Scholl, Andreas; Petersen, Charlotte F.; Anghinolfi, Luca; Wuth, Clemens; Dhuey, Scott; Chopdekar, Rajesh V.; Mellado, Paula; Alava, Mikko J.; van Dijken, Sebastiaan

doi:10.1038/ncomms12635

Title: Thermodynamics of emergent magnetic charge screening in artificial spin ice

Journal Article · Thu Sep 01 00:00:00 EDT 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms12635· OSTI ID:1377456

^[1]; Scholl, Andreas ^[2]; Petersen, Charlotte F. ^[3]; Anghinolfi, Luca ^[4]; Wuth, Clemens ^[5]; Dhuey, Scott ^[6];

^[7]; Mellado, Paula ^[8]; Alava, Mikko J. ^[3]; van Dijken, Sebastiaan ^[9]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Aalto Univ., Otaniemi (Finland). School of Science
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Aalto Univ., Otaniemi (Finland)
Universita di Genova, Genova (Italy)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Daegu Gyeongbuk Institute of Science and Technology (DGIST)., Daegu (Korea, Republic of)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States), Molecular Foundry
Univ. of California, Davis, CA (United States). Dept. of Materials Science and Engineering
Adolfo Ibanez Univ., Santiago (Chile)
Aalto Univ., Otaniemi (Finland). School of Science

Electric charge screening is a fundamental principle governing the behaviour in a variety of systems in nature. Through reconfiguration of the local environment, the Coulomb attraction between electric charges is decreased, leading, for example, to the creation of polaron states in solids or hydration shells around proteins in water. Here, we directly visualize the real-time creation and decay of screened magnetic charge configurations in a two-dimensional artificial spin ice system, the dipolar dice lattice. By comparing the temperature dependent occurrence of screened and unscreened emergent magnetic charge defects, we determine that screened magnetic charges are indeed a result of local energy reduction and appear as a transient minimum energy state before the system relaxes towards the predicted ground state. These results highlight the important role of emergent magnetic charges in artificial spin ice, giving rise to screened charge excitations and the emergence of exotic low-temperature configurations.

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

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

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1377456

Journal Information:: Nature Communications, Vol. 7; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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Emergent dynamic chirality in a thermally driven artificial spin ratchet Gliga, Sebastian; Hrkac, Gino; Donnelly, Claire Nature Materials, Vol. 16, Issue 11 https://doi.org/10.1038/nmat5007	journal	October 2017
Classical topological order in the kinetics of artificial spin ice Lao, Yuyang; Caravelli, Francesco; Sheikh, Mohammed Nature Physics, Vol. 14, Issue 7 https://doi.org/10.1038/s41567-018-0077-0	journal	April 2018
Effect of FePd alloy composition on the dynamics of artificial spin ice Morley, Sophie A.; Riley, Susan T.; Porro, Jose-Maria Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-23208-6	journal	March 2018
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Thermally induced magnetic relaxation in square artificial spin ice Andersson, M. S.; Pappas, S. D.; Stopfel, H. Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep37097	journal	November 2016
Tuning magnetic ordering in a dipolar square-kite tessellation Petersen, Charlotte F.; Farhan, Alan; Dhuey, Scott Applied Physics Letters, Vol. 112, Issue 9 https://doi.org/10.1063/1.5014041	journal	February 2018
Intermediate phase and pseudo phase transition in an artificial spin ice model Stancioli, R. A.; Mól, L. A. S. Physical Review B, Vol. 100, Issue 2 https://doi.org/10.1103/physrevb.100.024432	journal	July 2019
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