Dirac fermions and possible weak antilocalization in LaCuSb 2

Chamorro, J. R.; Topp, A.; Fang, Y.; Winiarski, M. J.; Ast, C. R.; Krivenkov, M.; Varykhalov, A.; Ramshaw, B. J.; Schoop, L. M.; McQueen, T. M.

doi:10.1063/1.5124685

Title: Dirac fermions and possible weak antilocalization in LaCuSb ₂

Abstract

Layered heavy-metal square-lattice compounds have recently emerged as potential Dirac fermion materials due to bonding within those sublattices. We report quantum transport and spectroscopic data on the layered Sb square-lattice material LaCuSb₂. Linearly dispersing band crossings, necessary to generate Dirac fermions, are experimentally observed in the electronic band structure observed using angle-resolved photoemission spectroscopy, along with a quasi-two-dimensional Fermi surface. Weak antilocalization that arises from two-dimensional transport is observed in the magnetoresistance, as well as regions of linear dependence, both of which are indicative of topologically nontrivial effects. Measurements of the Shubnikov–de Haas quantum oscillations show low effective mass electrons on the order of 0.065m_e, further confirming the presence of Dirac fermions in this material.

Authors:

^[1]; Topp, A. ^[2]; Fang, Y. ^[3];

^[4]; Ast, C. R. ^[5];

^[6];

^[3];

^[2];

^[1]

Johns Hopkins Univ., Baltimore, MD (United States)
Max-Planck-Inst. für Festkörperforschung, Stuttgart (Germany); Princeton Univ., NJ (United States)
Cornell Univ., Ithaca, NY (United States). Lab. of Atomic and Solid State Physics (LASSP)
Johns Hopkins Univ., Baltimore, MD (United States); Gdansk Univ. of Technology (Poland)
Max-Planck-Inst. für Festkörperforschung, Stuttgart (Germany)
Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy

Publication Date:: Mon Dec 16 00:00:00 EST 2019

Research Org.:: Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM); Johns Hopkins Univ., Baltimore, MD (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Army Research Office (ARO)

OSTI Identifier:: 1767714

Alternate Identifier(s):: OSTI ID: 1579456

Grant/Contract Number:: SC0019331; DMR-142054; W911NF-12-1-0461; 1752784

Resource Type:: Accepted Manuscript

Journal Name:: APL Materials

Additional Journal Information:: Journal Volume: 7; Journal Issue: 12; Journal ID: ISSN 2166-532X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; optics; thermal conductivity; defects; charge transport; superconductivity; magnetism and spin physics; quantum information science; materials and chemistry by design; synthesis (novel materials); Fermi surface; electronic transport; topological phases; angle-resolved photoemission spectroscopy; magnetic fields; density functional theory; electronic band structure; crystal structure; quantum oscillations

Citation Formats


                    Chamorro, J. R., Topp, A., Fang, Y., Winiarski, M. J., Ast, C. R., Krivenkov, M., Varykhalov, A., Ramshaw, B. J., Schoop, L. M., and McQueen, T. M. Dirac fermions and possible weak antilocalization in LaCuSb 2.  United States: N. p., 2019. 
Web.  doi:10.1063/1.5124685.

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                    Chamorro, J. R., Topp, A., Fang, Y., Winiarski, M. J., Ast, C. R., Krivenkov, M., Varykhalov, A., Ramshaw, B. J., Schoop, L. M., & McQueen, T. M. Dirac fermions and possible weak antilocalization in LaCuSb 2.  United States.  https://doi.org/10.1063/1.5124685

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                    Chamorro, J. R., Topp, A., Fang, Y., Winiarski, M. J., Ast, C. R., Krivenkov, M., Varykhalov, A., Ramshaw, B. J., Schoop, L. M., and McQueen, T. M. Mon .  
"Dirac fermions and possible weak antilocalization in LaCuSb 2".  United States.  https://doi.org/10.1063/1.5124685.  https://www.osti.gov/servlets/purl/1767714.

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@article{osti_1767714,

  title        = {Dirac fermions and possible weak antilocalization in LaCuSb 2},

  author       = {Chamorro, J. R. and Topp, A. and Fang, Y. and Winiarski, M. J. and Ast, C. R. and Krivenkov, M. and Varykhalov, A. and Ramshaw, B. J. and Schoop, L. M. and McQueen, T. M.},

  abstractNote = {Layered heavy-metal square-lattice compounds have recently emerged as potential Dirac fermion materials due to bonding within those sublattices. We report quantum transport and spectroscopic data on the layered Sb square-lattice material LaCuSb2. Linearly dispersing band crossings, necessary to generate Dirac fermions, are experimentally observed in the electronic band structure observed using angle-resolved photoemission spectroscopy, along with a quasi-two-dimensional Fermi surface. Weak antilocalization that arises from two-dimensional transport is observed in the magnetoresistance, as well as regions of linear dependence, both of which are indicative of topologically nontrivial effects. Measurements of the Shubnikov–de Haas quantum oscillations show low effective mass electrons on the order of 0.065me, further confirming the presence of Dirac fermions in this material.},

  doi          = {10.1063/1.5124685},

  journal      = {APL Materials},

  number       = 12,

  volume       = 7,

  place        = {United States},

  year         = {Mon Dec 16 00:00:00 EST 2019},

  month        = {Mon Dec 16 00:00:00 EST 2019}

}

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Title: Dirac fermions and possible weak antilocalization in LaCuSb 2

Abstract

Citation Formats

Topological Semimetals in Square-Net Materials journal, July 2019

Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2 text, January 2016

Nontrivial Berry phase in magnetic BaMnSb 2 semimetal journal, May 2017

Weak-antilocalization and surface dominated transport in topological insulator Bi 2 Se 2 Te journal, April 2015

Topological nodal line semimetals text, January 2016

wannier90: A tool for obtaining maximally-localised Wannier functions journal, May 2008

Chemical Principles of Topological Semimetals journal, April 2018

Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene text, January 2005

Ultrahigh electron mobility in suspended graphene text, January 2008

Topological Semimetals in Square-Net Materials text, January 2018

RCu1+xSb2 (R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y) Phases with Defect CaBe2Ge2-Type Structure journal, January 2005

Growth of single crystals from metallic fluxes journal, June 1992

Weak-antilocalization and Surface Dominated Transport in Topological Insulator Bi2Se2Te preprint, January 2014

Topological Insulators in Three Dimensions text, January 2006

Experimental Discovery of Weyl Semimetal TaAs journal, July 2015

Dirac-like band structure of LaTESb2 (TE = Ni, Cu, and Pd) superconductors by DFT calculations journal, November 2018

On the crystal structure and magnetic properties of the ternary rare earth compounds RETSb2 with RE  rare earth and T  Ni, Pd, Cu and Au journal, August 1994

Ultrahigh electron mobility in suspended graphene journal, June 2008

Interplay of Dirac electrons and magnetism in CaMnBi2 and SrMnBi2 journal, December 2016

Dirac cone protected by non-symmorphic symmetry and three-dimensional Dirac line node in ZrSiS journal, May 2016

Theory of the Shubnikov—de Haas effect journal, January 1958

Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd3As2 journal, November 2014

Topological nodal line semimetals journal, November 2016

Two-dimensional gas of massless Dirac fermions in graphene journal, November 2005

Experimental observation of the quantum Hall effect and Berry's phase in graphene journal, November 2005

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Non-symmorphic band degeneracy at the Fermi level in ZrSiTe journal, December 2016

Quantum Hall effect in a bulk antiferromagnet EuMnBi 2 with magnetically confined two-dimensional Dirac fermions journal, January 2016

Negative Magnetoresistance in Dirac Semimetal Cd3As2 text, January 2015

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Quasi-two-dimensional Dirac fermions and quantum magnetoresistance in LaAgBi 2 journal, June 2013

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Effects of electron-electron collisions with small energy transfers on quantum localisation journal, December 1982

Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface journal, May 2009

A magnetic topological semimetal Sr1−yMn1−zSb2 (y, z < 0.1) journal, July 2017

Magneto-resistance studies on RTSb2 compounds (RLa, Ce and TNi, Cu) journal, June 1996

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Observation of Dirac-like band dispersion in LaAgSb 2 journal, February 2016

Square nets of main-group elements in solid-state materials journal, January 1987

Strong Anisotropy of Dirac Cone in SrMnBi2 and CaMnBi2 Revealed by Angle-Resolved Photoemission Spectroscopy text, January 2013

Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te journal, October 2012

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Title: Dirac fermions and possible weak antilocalization in LaCuSb ₂

Topological Semimetals in Square-Net Materials
journal, July 2019

Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2
text, January 2016

Nontrivial Berry phase in magnetic BaMnSb ₂ semimetal
journal, May 2017

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text, January 2016

wannier90: A tool for obtaining maximally-localised Wannier functions
journal, May 2008

Chemical Principles of Topological Semimetals
journal, April 2018

Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
text, January 2005

Ultrahigh electron mobility in suspended graphene
text, January 2008

Topological Semimetals in Square-Net Materials
text, January 2018

RCu_1+xSb₂ (R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y) Phases with Defect CaBe₂Ge₂-Type Structure
journal, January 2005

Growth of single crystals from metallic fluxes
journal, June 1992

Weak-antilocalization and Surface Dominated Transport in Topological Insulator Bi2Se2Te
preprint, January 2014

Topological Insulators in Three Dimensions
text, January 2006

Experimental Discovery of Weyl Semimetal TaAs
journal, July 2015

Dirac-like band structure of LaTESb2 (TE = Ni, Cu, and Pd) superconductors by DFT calculations
journal, November 2018

On the crystal structure and magnetic properties of the ternary rare earth compounds RETSb2 with RE  rare earth and T  Ni, Pd, Cu and Au
journal, August 1994

Ultrahigh electron mobility in suspended graphene
journal, June 2008

Interplay of Dirac electrons and magnetism in CaMnBi2 and SrMnBi2
journal, December 2016

Dirac cone protected by non-symmorphic symmetry and three-dimensional Dirac line node in ZrSiS
journal, May 2016

Theory of the Shubnikov—de Haas effect
journal, January 1958

Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd3As2
journal, November 2014

Topological nodal line semimetals
journal, November 2016

Two-dimensional gas of massless Dirac fermions in graphene
journal, November 2005

Experimental observation of the quantum Hall effect and Berry's phase in graphene
journal, November 2005

Nontrivial Berry phase in magnetic BaMnSb2 semimetal
text, January 2017

Non-symmorphic band degeneracy at the Fermi level in ZrSiTe
journal, December 2016

Quantum Hall effect in a bulk antiferromagnet EuMnBi ₂ with magnetically confined two-dimensional Dirac fermions
journal, January 2016

Negative Magnetoresistance in Dirac Semimetal Cd3As2
text, January 2015

Quantum Hall effect in a bulk antiferromagnet EuMnBi$_2$ with magnetically confined two-dimensional Dirac fermions
text, January 2017

Quasi-two-dimensional Dirac fermions and quantum magnetoresistance in LaAgBi $_{2}$
journal, June 2013

Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2
journal, May 2014

Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi
journal, January 2014

Nearly massless Dirac fermions hosted by Sb square net in BaMnSb2
journal, July 2016

Effects of electron-electron collisions with small energy transfers on quantum localisation
journal, December 1982

Topological insulators in Bi₂Se₃, Bi₂Te₃ and Sb₂Te₃ with a single Dirac cone on the surface
journal, May 2009

A magnetic topological semimetal Sr1−yMn1−zSb2 (y, z < 0.1)
journal, July 2017

Magneto-resistance studies on RTSb2 compounds (RLa, Ce and TNi, Cu)
journal, June 1996

Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
text, January 2013

Observation of Dirac-like band dispersion in ${LaAgSb}_{2}$
journal, February 2016

Square nets of main-group elements in solid-state materials
journal, January 1987

Strong Anisotropy of Dirac Cone in SrMnBi2 and CaMnBi2 Revealed by Angle-Resolved Photoemission Spectroscopy
text, January 2013

Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te
journal, October 2012

Strong Anisotropy of Dirac Cones in SrMnBi2 and CaMnBi2 Revealed by Angle-Resolved Photoemission Spectroscopy
journal, June 2014

Quantum oscillations and coherent interlayer transport in a new topological Dirac semimetal candidate ${YbMnSb}_{2}$
journal, February 2018

Observation of Dirac-like band dispersion in LaAgSb$_2$
text, January 2015

Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd$_3$As$_2$
text, January 2014

Experimental discovery of Weyl semimetal TaAs
text, January 2015

Negative magnetoresistance in Dirac semimetal Cd3As2
journal, January 2016

Quasi-two-dimensional massless Dirac fermions in ${CaMnSb}_{2}$
journal, January 2017

Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2
journal, September 2017

Multiband effects and possible Dirac states in LaAgSb $_{2}$
journal, October 2012