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Title: Correlated states in β-Li 2IrO 3 driven by applied magnetic fields

Magnetic honeycomb iridates are thought to show strongly spin-anisotropic exchange interactions which, when highly frustrated, lead to an exotic state of matter known as the Kitaev quantum spin liquid. However, in all known examples these materials magnetically order at finite temperatures, the scale of which may imply weak frustration. Here we show that the application of a relatively small magnetic field drives the three-dimensional magnet β-Li 2IrO 3 from its incommensurate ground state into a quantum correlated paramagnet. Interestingly, this paramagnetic state admixes a zig-zag spin mode analogous to the zig-zag order seen in other Mott-Kitaev compounds. The rapid onset of the field-induced correlated state implies the exchange interactions are delicately balanced, leading to strong frustration and a near degeneracy of different ground states.
Authors:
 [1] ;  [2] ; ORCiD logo [1] ;  [3] ;  [1] ;  [4] ;  [4] ;  [1] ;  [5] ;  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  2. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division, Advanced Light Source
  3. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
  4. Univ. of Texas at Dallas, Richardson, TX (United States). Dept. of Chemistry
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
Publication Date:
Grant/Contract Number:
AC02-06CH11357; SC0014039; DGE1106400; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 36 MATERIALS SCIENCE
OSTI Identifier:
1407955
Alternate Identifier(s):
OSTI ID: 1419448; OSTI ID: 1423626; OSTI ID: 1466718

Ruiz, Alejandro, Frano, Alex, Breznay, Nicholas P., Kimchi, Itamar, Helm, Toni, Oswald, Iain, Chan, Julia Y., Birgeneau, R. J., Islam, Zahirul, and Analytis, James G.. Correlated states in β-Li2IrO3 driven by applied magnetic fields. United States: N. p., Web. doi:10.1038/s41467-017-01071-9.
Ruiz, Alejandro, Frano, Alex, Breznay, Nicholas P., Kimchi, Itamar, Helm, Toni, Oswald, Iain, Chan, Julia Y., Birgeneau, R. J., Islam, Zahirul, & Analytis, James G.. Correlated states in β-Li2IrO3 driven by applied magnetic fields. United States. doi:10.1038/s41467-017-01071-9.
Ruiz, Alejandro, Frano, Alex, Breznay, Nicholas P., Kimchi, Itamar, Helm, Toni, Oswald, Iain, Chan, Julia Y., Birgeneau, R. J., Islam, Zahirul, and Analytis, James G.. 2017. "Correlated states in β-Li2IrO3 driven by applied magnetic fields". United States. doi:10.1038/s41467-017-01071-9. https://www.osti.gov/servlets/purl/1407955.
@article{osti_1407955,
title = {Correlated states in β-Li2IrO3 driven by applied magnetic fields},
author = {Ruiz, Alejandro and Frano, Alex and Breznay, Nicholas P. and Kimchi, Itamar and Helm, Toni and Oswald, Iain and Chan, Julia Y. and Birgeneau, R. J. and Islam, Zahirul and Analytis, James G.},
abstractNote = {Magnetic honeycomb iridates are thought to show strongly spin-anisotropic exchange interactions which, when highly frustrated, lead to an exotic state of matter known as the Kitaev quantum spin liquid. However, in all known examples these materials magnetically order at finite temperatures, the scale of which may imply weak frustration. Here we show that the application of a relatively small magnetic field drives the three-dimensional magnet β-Li2IrO3 from its incommensurate ground state into a quantum correlated paramagnet. Interestingly, this paramagnetic state admixes a zig-zag spin mode analogous to the zig-zag order seen in other Mott-Kitaev compounds. The rapid onset of the field-induced correlated state implies the exchange interactions are delicately balanced, leading to strong frustration and a near degeneracy of different ground states.},
doi = {10.1038/s41467-017-01071-9},
journal = {Nature Communications},
number = 1,
volume = 8,
place = {United States},
year = {2017},
month = {10}
}