Electron doping a kagome spin liquid
Abstract
Herbertsmithite, ZnCu3(OH)6Cl2, is a two-dimensional kagome lattice realization of a spin liquid, with evidence for fractionalized excitations and a gapped ground state. Such a quantum spin liquid has been proposed to underlie high-temperature superconductivity and is predicted to produce a wealth of new states, including a Dirac metal at 1/3 electron doping. Here, we report the topochemical synthesis of electron-doped ZnLixCu3(OH)6Cl2 from x=0 to x=1.8 (3/5 per Cu2+). Contrary to expectations, no metallicity or superconductivity is induced. Instead, we find a systematic suppression of magnetic behavior across the phase diagram. Lastly, our results demonstrate that significant theoretical work is needed to understand and predict the role of doping in magnetically frustrated narrow band insulators, particularly the interplay between local structural disorder and tendency toward electron localization, and pave the way for future studies of doped spin liquids.
- Authors:
-
- The Johns Hopkins Univ., Baltimore, MD (United States)
- Publication Date:
- Research Org.:
- Johns Hopkins Univ., Baltimore, MD (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1361679
- Grant/Contract Number:
- FG02-08ER46544
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kelly, Z. A., Gallagher, M. J., and McQueen, T. M. Electron doping a kagome spin liquid. United States: N. p., 2016.
Web. doi:10.1103/PhysRevX.6.041007.
Kelly, Z. A., Gallagher, M. J., & McQueen, T. M. Electron doping a kagome spin liquid. United States. https://doi.org/10.1103/PhysRevX.6.041007
Kelly, Z. A., Gallagher, M. J., and McQueen, T. M. Thu .
"Electron doping a kagome spin liquid". United States. https://doi.org/10.1103/PhysRevX.6.041007. https://www.osti.gov/servlets/purl/1361679.
@article{osti_1361679,
title = {Electron doping a kagome spin liquid},
author = {Kelly, Z. A. and Gallagher, M. J. and McQueen, T. M.},
abstractNote = {Herbertsmithite, ZnCu3(OH)6Cl2, is a two-dimensional kagome lattice realization of a spin liquid, with evidence for fractionalized excitations and a gapped ground state. Such a quantum spin liquid has been proposed to underlie high-temperature superconductivity and is predicted to produce a wealth of new states, including a Dirac metal at 1/3 electron doping. Here, we report the topochemical synthesis of electron-doped ZnLixCu3(OH)6Cl2 from x=0 to x=1.8 (3/5 per Cu2+). Contrary to expectations, no metallicity or superconductivity is induced. Instead, we find a systematic suppression of magnetic behavior across the phase diagram. Lastly, our results demonstrate that significant theoretical work is needed to understand and predict the role of doping in magnetically frustrated narrow band insulators, particularly the interplay between local structural disorder and tendency toward electron localization, and pave the way for future studies of doped spin liquids.},
doi = {10.1103/PhysRevX.6.041007},
journal = {Physical Review. X},
number = 4,
volume = 6,
place = {United States},
year = {Thu Oct 13 00:00:00 EDT 2016},
month = {Thu Oct 13 00:00:00 EDT 2016}
}
Web of Science
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