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Title: Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb 2

Abstract

Here we present the crystal structure, electronic structure, and transport properties of the material $${\mathrm{YbMnSb}}_{2}$$, a candidate system for the investigation of Dirac physics in the presence of magnetic order. Our measurements reveal that this system is a low-carrier-density semimetal with a two-dimensional Fermi surface arising from a Dirac dispersion, consistent with the predictions of density-functional-theory calculations of the antiferromagnetic system. Finally, the low temperature resistivity is very large, suggesting that scattering in this system is highly efficient at dissipating momentum despite its Dirac-like nature.

Authors:
 [1];  [2];  [3];  [1];  [4];  [1];  [5];  [5];  [3];  [4];  [6];  [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; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  4. Univ. of Texas, Dallas, TX (United States). Dept. of Chemistry and Biochemistry
  5. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Univ. of Texas, Dallas, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Gordon and Betty Moore Foundation (United States)
OSTI Identifier:
1483269
Alternate Identifier(s):
OSTI ID: 1416414
Grant/Contract Number:  
AC02-05CH11231; DGE-1106400; DMR-1360863; 1607753; GBMF4374
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; antiferromagnetism; electronic structure; Fermi surface; magnetotransport; topological materials; topological phases of matter

Citation Formats

Kealhofer, Robert, Jang, Sooyoung, Griffin, Sinéad M., John, Caolan, Benavides, Katherine A., Doyle, Spencer, Helm, T., Moll, Philip J. W., Neaton, Jeffrey B., Chan, Julia Y., Denlinger, J. D., and Analytis, James G. Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.045109.
Kealhofer, Robert, Jang, Sooyoung, Griffin, Sinéad M., John, Caolan, Benavides, Katherine A., Doyle, Spencer, Helm, T., Moll, Philip J. W., Neaton, Jeffrey B., Chan, Julia Y., Denlinger, J. D., & Analytis, James G. Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2. United States. doi:10.1103/PhysRevB.97.045109.
Kealhofer, Robert, Jang, Sooyoung, Griffin, Sinéad M., John, Caolan, Benavides, Katherine A., Doyle, Spencer, Helm, T., Moll, Philip J. W., Neaton, Jeffrey B., Chan, Julia Y., Denlinger, J. D., and Analytis, James G. Wed . "Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2". United States. doi:10.1103/PhysRevB.97.045109. https://www.osti.gov/servlets/purl/1483269.
@article{osti_1483269,
title = {Observation of a two-dimensional Fermi surface and Dirac dispersion in YbMnSb2},
author = {Kealhofer, Robert and Jang, Sooyoung and Griffin, Sinéad M. and John, Caolan and Benavides, Katherine A. and Doyle, Spencer and Helm, T. and Moll, Philip J. W. and Neaton, Jeffrey B. and Chan, Julia Y. and Denlinger, J. D. and Analytis, James G.},
abstractNote = {Here we present the crystal structure, electronic structure, and transport properties of the material ${\mathrm{YbMnSb}}_{2}$, a candidate system for the investigation of Dirac physics in the presence of magnetic order. Our measurements reveal that this system is a low-carrier-density semimetal with a two-dimensional Fermi surface arising from a Dirac dispersion, consistent with the predictions of density-functional-theory calculations of the antiferromagnetic system. Finally, the low temperature resistivity is very large, suggesting that scattering in this system is highly efficient at dissipating momentum despite its Dirac-like nature.},
doi = {10.1103/PhysRevB.97.045109},
journal = {Physical Review B},
issn = {2469-9950},
number = 4,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 7 works
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Figures / Tables:

FIG. 1 FIG. 1: The structure of YbMnSb2. (a) Schematic of the YbMnSb2 structure drawn in vesta, from single crystal Xray diffraction data. YbMnSb2 is isotypic with the HfCuSi2 structure type. Here yellow is Yb, blue is Mn, and red is Sb. Perspective drawing (left) shows Sb planes and the tetrahedral coordinationmore » of Mn by Sb, top right looks down the c-axis, and bottom right looks down the a-axis. (b) Experimental powder pattern of YbMnSb2 crystals (top trace) and expected powder pattern from Table I and Table II, simulated in VESTA. Inset: Millimeter-sized YbMnSb2 crystal. Crystals are highly lustrous, as can be seen from the reflection of the fluorescent room lighting across the bottom of the crystal. (c) Core level spectroscopy of YbMnSb2 unambiguously indicates the 2+ oxidation state of Yb.« less

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