Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission

Schusser, Jakub; Bentmann, Hendrik; Ünzelmann, Maxmillian; Figgemeier, Tim; Min, Chul -Hee; Moser, Simon; Neu, Jenn  N.; Siegrist, Theo; Reinert, F.

doi:10.1103/physrevlett.129.246404

Title: Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission

Abstract

The electronic structure of Weyl semimetals features Berry flux monopoles in the bulk and Fermi arcs at the surface. While angle-resolved photoelectron spectroscopy (ARPES) is successfully used to map the bulk and surface bands, it remains a challenge to explicitly resolve and pinpoint these topological features. Here we combine state-of-the-art photoemission theory and experiments over a wide range of excitation energies for the Weyl semimetals TaAs and TaP. Further, our results show that simple surface-band-counting schemes, proposed previously to identify nonzero Chern numbers, are ambiguous due to pronounced momentum-dependent spectral weight variations and the pronounced surface-bulk hybridization. Instead, our findings indicate that dichroic ARPES provides an improved approach to identify Fermi arcs but requires an accurate description of the photoelectron final state.

Authors:

^[1]; Bentmann, Hendrik ^[1]; Ünzelmann, Maxmillian ^[1]; Figgemeier, Tim ^[1]; Min, Chul -Hee ^[2]; Moser, Simon ^[1]; Neu, Jenn N. ^[3]; Siegrist, Theo ^[4];

^[1]

Univ. of Wurzburg (Germany)
Univ. zu Kiel (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Ruprecht Haensel Lab.
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); FAMU-FSU College of Engineering, Tallahassee, FL (United States)

Publication Date:: Fri Dec 09 00:00:00 EST 2022

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE; Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter; German Research Foundation (DFG)

OSTI Identifier:: 1909093

Grant/Contract Number:: AC05-00OR22725; EXC 2147; SFB1170

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 129; Journal Issue: 24; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; electronic structure; Fermi surface; surface states; topological materials; Weyl semimetal; angle-resolved photoemission spectroscopy; density functional theory; Korringa-Kohn-Rostoker method; topology

Citation Formats


                    Schusser, Jakub, Bentmann, Hendrik, Ünzelmann, Maxmillian, Figgemeier, Tim, Min, Chul -Hee, Moser, Simon, Neu, Jenn  N., Siegrist, Theo, and Reinert, F. Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission.  United States: N. p., 2022. 
Web.  doi:10.1103/physrevlett.129.246404.

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                    Schusser, Jakub, Bentmann, Hendrik, Ünzelmann, Maxmillian, Figgemeier, Tim, Min, Chul -Hee, Moser, Simon, Neu, Jenn  N., Siegrist, Theo, & Reinert, F. Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission.  United States.  https://doi.org/10.1103/physrevlett.129.246404

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                    Schusser, Jakub, Bentmann, Hendrik, Ünzelmann, Maxmillian, Figgemeier, Tim, Min, Chul -Hee, Moser, Simon, Neu, Jenn  N., Siegrist, Theo, and Reinert, F. Fri .  
"Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission".  United States.  https://doi.org/10.1103/physrevlett.129.246404.  https://www.osti.gov/servlets/purl/1909093.

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@article{osti_1909093,

  title        = {Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission},

  author       = {Schusser, Jakub and Bentmann, Hendrik and Ünzelmann, Maxmillian and Figgemeier, Tim and Min, Chul -Hee and Moser, Simon and Neu, Jenn  N. and Siegrist, Theo and Reinert, F.},

  abstractNote = {The electronic structure of Weyl semimetals features Berry flux monopoles in the bulk and Fermi arcs at the surface. While angle-resolved photoelectron spectroscopy (ARPES) is successfully used to map the bulk and surface bands, it remains a challenge to explicitly resolve and pinpoint these topological features. Here we combine state-of-the-art photoemission theory and experiments over a wide range of excitation energies for the Weyl semimetals TaAs and TaP. Further, our results show that simple surface-band-counting schemes, proposed previously to identify nonzero Chern numbers, are ambiguous due to pronounced momentum-dependent spectral weight variations and the pronounced surface-bulk hybridization. Instead, our findings indicate that dichroic ARPES provides an improved approach to identify Fermi arcs but requires an accurate description of the photoelectron final state.},

  doi          = {10.1103/physrevlett.129.246404},

  journal      = {Physical Review Letters},

  number       = 24,

  volume       = 129,

  place        = {United States},

  year         = {Fri Dec 09 00:00:00 EST 2022},

  month        = {Fri Dec 09 00:00:00 EST 2022}

}

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Title: Assessing Nontrivial Topology in Weyl Semimetals by Dichroic Photoemission

Abstract

Citation Formats

Photoemission spectroscopy—from early days to recent applications journal, January 2005

Photoemission spectroscopy in metals: journal, October 1999

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Interplay of Dirac Nodes and Volkov-Pankratov Surface States in Compressively Strained HgTe journal, August 2019

Momentum-space signatures of Berry flux monopoles in the Weyl semimetal TaAs journal, June 2021

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Studying local Berry curvature in 2H-WSe2 by circular dichroism photoemission utilizing crystal mirror plane journal, January 2021

Orbital Fingerprint of Topological Fermi Arcs in the Weyl Semimetal TaP journal, March 2019

Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates journal, May 2011

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Experimental discovery of a topological Weyl semimetal state in TaP journal, November 2015

Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family journal, November 2015

Calculating condensed matter properties using the KKR-Green's function method—recent developments and applications journal, August 2011

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Transmission and reflection of low-energy electrons at the surface barrier of a metal journal, December 1977

Spectral Function of Ferromagnetic 3 d Metals: A Self-Consistent LSDA + DMFT Approach Combined with the One-Step Model of Photoemission journal, December 2006

Photoemission Studies of Copper and Silver: Theory journal, November 1964

Importance of electron correlations in understanding photoelectron spectroscopy and Weyl character of MoTe 2 journal, January 2019

Experimental Discovery of Weyl Semimetal TaAs journal, July 2015

Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP journal, September 2015

Orbital-Driven Rashba Effect in a Binary Honeycomb Monolayer AgTe journal, April 2020

Orbital Rashba effect and its detection by circular dichroism angle-resolved photoemission spectroscopy journal, May 2012

Connection of a Topological Surface State with the Bulk Continuum in Sb 2 Te 3 ( 0001 ) journal, February 2015

Contest between surface resonances and surface states at 3 d ferromagnets journal, August 2002

Chiral Orbital-Angular Momentum in the Surface States of Bi 2 Se 3 journal, January 2012

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Photoemission spectroscopy—from early days to recent applications
journal, January 2005

Photoemission spectroscopy in metals:
journal, October 1999

Probing the Electronic Structure of Complex Systems by ARPES
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An experimentalist's guide to the matrix element in angle resolved photoemission
journal, January 2017

Computational framework chinook for angle-resolved photoemission spectroscopy
journal, November 2019

Weyl and Dirac semimetals in three-dimensional solids
journal, January 2018

Experimental perspective on three-dimensional topological semimetals
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Interplay of Dirac Nodes and Volkov-Pankratov Surface States in Compressively Strained HgTe
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Momentum-space signatures of Berry flux monopoles in the Weyl semimetal TaAs
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Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy from two-dimensional materials
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Orbital Fingerprint of Topological Fermi Arcs in the Weyl Semimetal TaP
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Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates
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Criteria for Directly Detecting Topological Fermi Arcs in Weyl Semimetals
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Experimental discovery of a topological Weyl semimetal state in TaP
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Evolution of the Fermi surface of Weyl semimetals in the transition metal pnictide family
journal, November 2015

Calculating condensed matter properties using the KKR-Green's function method—recent developments and applications
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Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions
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Spectral Function of Ferromagnetic $3 d$ Metals: A Self-Consistent $LSDA + DMFT$ Approach Combined with the One-Step Model of Photoemission
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Photoemission Studies of Copper and Silver: Theory
journal, November 1964

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Experimental Discovery of Weyl Semimetal TaAs
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Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP
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