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Title: Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice

Abstract

Two-dimensional artificial magnetic honeycomb lattices are at the forefront of research on unconventional magnetic materials. Among the many emergent magnetic phases that are predicted to arise as a function of temperature, the low temperature spin solid phase with zero magnetization and entropy is of special importance. Here, we report an interesting perspective to the consequence of spin solid order in an artificial honeycomb lattice of ultra-small connected elements using electrical dimensionality analysis. At low temperature, T ≤ 30 K, the system exhibits a very strong insulating characteristic. The electrical dimensionality analysis of the experimental data reveals a fractional dimensionality of d = 0.6(0.04) in the spin solid phase of honeycomb lattice at low temperature. The much smaller electrical dimension in the spin solid phase, perhaps, underscores the strong insulating behavior in this system. Furthermore, the fractional dimensionality in an otherwise two-dimensional system suggests a non-surface-like electrical transport at low temperature in an artificial honeycomb lattice.

Authors:
 [1];  [1];  [1]
  1. Univ. of Missouri, Columbia, MO (United States)
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1503631
Alternate Identifier(s):
OSTI ID: 1420018
Grant/Contract Number:  
SC0014461
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 6; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Dahal, A., Summers, B., and Singh, D. K.. Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice. United States: N. p., 2018. Web. https://doi.org/10.1063/1.5017816.
Dahal, A., Summers, B., & Singh, D. K.. Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice. United States. https://doi.org/10.1063/1.5017816
Dahal, A., Summers, B., and Singh, D. K.. Fri . "Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice". United States. https://doi.org/10.1063/1.5017816. https://www.osti.gov/servlets/purl/1503631.
@article{osti_1503631,
title = {Fractional electrical dimensionality in the spin solid phase of artificial honeycomb lattice},
author = {Dahal, A. and Summers, B. and Singh, D. K.},
abstractNote = {Two-dimensional artificial magnetic honeycomb lattices are at the forefront of research on unconventional magnetic materials. Among the many emergent magnetic phases that are predicted to arise as a function of temperature, the low temperature spin solid phase with zero magnetization and entropy is of special importance. Here, we report an interesting perspective to the consequence of spin solid order in an artificial honeycomb lattice of ultra-small connected elements using electrical dimensionality analysis. At low temperature, T ≤ 30 K, the system exhibits a very strong insulating characteristic. The electrical dimensionality analysis of the experimental data reveals a fractional dimensionality of d = 0.6(0.04) in the spin solid phase of honeycomb lattice at low temperature. The much smaller electrical dimension in the spin solid phase, perhaps, underscores the strong insulating behavior in this system. Furthermore, the fractional dimensionality in an otherwise two-dimensional system suggests a non-surface-like electrical transport at low temperature in an artificial honeycomb lattice.},
doi = {10.1063/1.5017816},
journal = {Applied Physics Letters},
number = 6,
volume = 112,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: Moment configuration. (a) Schematic of two-in and 1-out moment configurations on a honeycomb lattice vertex. Here, two moments are pointing to the vertex and one point is pointing away from the vertex. (b) All-in moment configuration where all three moments are pointing to the vertex. (c) The scanningmore » electron micrograph of a typical artificial honeycomb lattice, fabricated using the diblock template synthesis method.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.