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Title: Dirac nodal lines protected against spin-orbit interaction in IrO2

Abstract

The interplay between strong spin-orbit coupling and electron correlations has recently been the subject of intense investigation, due to a number of theoretically predicted phases such as quantum spin liquids, unconventional superconductivity, complex magnetic orders, and correlated topological phases of matter. In particular, iridates have been proposed as a promising family of materials which could host a number of these phases. In this paper, we report the existence of Dirac nodal lines in the binary oxide IrO2, through a combination of reactive oxide molecular beam epitaxy and angle-resolved photoemission spectroscopy. Unlike in other such materials reported to date, these Dirac nodal lines have the unique property of being simultaneously (i) robust against spin-orbit coupling, as they are protected by the nonsymmorphic symmetry of the rutile structure, and (ii) only partially occupied, since they cross the Fermi level. This should have direct implications on the low-energy physics properties tied to the band velocity such as magnetoresistance and spin Hall effect.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5];  [5];  [5];  [6];  [7];  [2]
+ Show Author Affiliations
  1. Cornell Univ., Ithaca, NY (United States). Lab. of Atomic and Solid State Physics (LASSP)
  2. Cornell Univ., Ithaca, NY (United States)
  3. Univ. of Wisconsin, Madison, WI (United States)
  4. Univ. of Wurzburg (Germany)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  6. Cornell Univ., Ithaca, NY (United States); Cornell Univ., Ithaca, NY (United States). Kavli Inst. for Nanoscale Science
  7. Cornell Univ., Ithaca, NY (United States). Lab. of Atomic and Solid State Physics (LASSP); Cornell Univ., Ithaca, NY (United States). Kavli Inst. for Nanoscale Science
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1656518
Alternate Identifier(s):
OSTI ID: 1546412
Grant/Contract Number:  
AC02-05CH11231; DMR-1539918; NSF DMR- 1709255; FA9550-15-1-0474; DMR-1719875; ECCS-1542081
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 6; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Nelson, J. N., Ruf, J. P., Lee, Y., Zeledon, C., Kawasaki, J. K., Moser, S., Jozwiak, C., Rotenberg, E., Bostwick, A., Schlom, D. G., Shen, K. M., and Moreschini, L. Dirac nodal lines protected against spin-orbit interaction in IrO2. United States: N. p., 2019. Web. doi:10.1103/physrevmaterials.3.064205.
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Nelson, J. N., Ruf, J. P., Lee, Y., Zeledon, C., Kawasaki, J. K., Moser, S., Jozwiak, C., Rotenberg, E., Bostwick, A., Schlom, D. G., Shen, K. M., & Moreschini, L. Dirac nodal lines protected against spin-orbit interaction in IrO2. United States. https://doi.org/10.1103/physrevmaterials.3.064205
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Nelson, J. N., Ruf, J. P., Lee, Y., Zeledon, C., Kawasaki, J. K., Moser, S., Jozwiak, C., Rotenberg, E., Bostwick, A., Schlom, D. G., Shen, K. M., and Moreschini, L. Tue . "Dirac nodal lines protected against spin-orbit interaction in IrO2". United States. https://doi.org/10.1103/physrevmaterials.3.064205. https://www.osti.gov/servlets/purl/1656518.
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@article{osti_1656518,
title = {Dirac nodal lines protected against spin-orbit interaction in IrO2},
author = {Nelson, J. N. and Ruf, J. P. and Lee, Y. and Zeledon, C. and Kawasaki, J. K. and Moser, S. and Jozwiak, C. and Rotenberg, E. and Bostwick, A. and Schlom, D. G. and Shen, K. M. and Moreschini, L.},
abstractNote = {The interplay between strong spin-orbit coupling and electron correlations has recently been the subject of intense investigation, due to a number of theoretically predicted phases such as quantum spin liquids, unconventional superconductivity, complex magnetic orders, and correlated topological phases of matter. In particular, iridates have been proposed as a promising family of materials which could host a number of these phases. In this paper, we report the existence of Dirac nodal lines in the binary oxide IrO2, through a combination of reactive oxide molecular beam epitaxy and angle-resolved photoemission spectroscopy. Unlike in other such materials reported to date, these Dirac nodal lines have the unique property of being simultaneously (i) robust against spin-orbit coupling, as they are protected by the nonsymmorphic symmetry of the rutile structure, and (ii) only partially occupied, since they cross the Fermi level. This should have direct implications on the low-energy physics properties tied to the band velocity such as magnetoresistance and spin Hall effect.},
doi = {10.1103/physrevmaterials.3.064205},
journal = {Physical Review Materials},
number = 6,
volume = 3,
place = {United States},
year = {Tue Jun 18 00:00:00 EDT 2019},
month = {Tue Jun 18 00:00:00 EDT 2019}
}
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Journal Article:
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https://doi.org/10.1103/physrevmaterials.3.064205
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