Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6

Rößler, Sahana; Jiao, Lin; Seiro, Silvia; Rosa, Priscila F. S.; Fisk, Zachary; Rößler, Ulrich K.; Wirth, Steffen

doi:10.1103/PhysRevB.101.235421

Title: Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal ${EuB}_{6}$

Abstract

We performed scanning tunneling microscopy (STM) and spectroscopy on a (001) surface of the ferromagnetic semimetal EuB₆. Large-amplitude oscillations emanating from the elastic scattering of electrons by the surface impurities are observed in topography and in differential conductance maps. Fourier transform of the conductance maps embracing these regions indicate a holelike dispersion centered around the $$\bar{Γ}$$ point of the two-dimensional Brillouin zone. Using density functional theory slab calculations, we identify a spin-split surface state, which stems from the dangling p_z orbitals of the apical boron atom. Hybridization with bulk electronic states leads to a resonance enhancement in certain regions around the $$\bar{Γ}$$ point, contributing to the remarkably strong real-space response around static point defects, which are observed in STM measurements.

Authors:

;

Publication Date:: 2020-06-11

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; German Research Foundation (DFG)

OSTI Identifier:: 1633007

Alternate Identifier(s):: OSTI ID: 1648111

Report Number(s):: LA-UR-20-24844
Journal ID: ISSN 2469-9950; PRBMDO; 235421

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Published Article

Journal Name:: Physical Review B

Additional Journal Information:: Journal Name: Physical Review B Journal Volume: 101 Journal Issue: 23; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; material science; density of states; electronic structure; first-principles calculations; polarons; surface states; ferromagnets; semimetals; density functional calculations; scanning tunneling microscopy

Citation Formats


                    Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., and Wirth, Steffen. Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6.  United States: N. p., 2020. 
        Web.  doi:10.1103/PhysRevB.101.235421.

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                    Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., & Wirth, Steffen. Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6.  United States.  doi:https://doi.org/10.1103/PhysRevB.101.235421

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                    Rößler, Sahana, Jiao, Lin, Seiro, Silvia, Rosa, Priscila F. S., Fisk, Zachary, Rößler, Ulrich K., and Wirth, Steffen. Thu .  
        "Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6".  United States.  doi:https://doi.org/10.1103/PhysRevB.101.235421.

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@article{osti_1633007,

  title        = {Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6},

  author       = {Rößler, Sahana and Jiao, Lin and Seiro, Silvia and Rosa, Priscila F. S. and Fisk, Zachary and Rößler, Ulrich K. and Wirth, Steffen},

  abstractNote = {We performed scanning tunneling microscopy (STM) and spectroscopy on a (001) surface of the ferromagnetic semimetal EuB6. Large-amplitude oscillations emanating from the elastic scattering of electrons by the surface impurities are observed in topography and in differential conductance maps. Fourier transform of the conductance maps embracing these regions indicate a holelike dispersion centered around the $\bar{Γ}$ point of the two-dimensional Brillouin zone. Using density functional theory slab calculations, we identify a spin-split surface state, which stems from the dangling pz orbitals of the apical boron atom. Hybridization with bulk electronic states leads to a resonance enhancement in certain regions around the $\bar{Γ}$ point, contributing to the remarkably strong real-space response around static point defects, which are observed in STM measurements.},

  doi          = {10.1103/PhysRevB.101.235421},

  journal      = {Physical Review B},

  number       = 23,

  volume       = 101,

  place        = {United States},

  year         = {2020},

  month        = {6}

}

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Title: Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal EuB 6

Abstract

Citation Formats

Nonlinear Hall Effect as a Signature of Electronic Phase Separation in the Semimetallic Ferromagnet EuB 6 journal, September 2009

Generalized Gradient Approximation Made Simple journal, October 1996

Evidence for Ferromagnetic Clusters in the Colossal-Magnetoresistance Material EuB 6 journal, June 2018

Topological Kondo Insulators journal, March 2010

Properties of LaB 6 elucidated by density functional theory journal, November 2004

Spectroscopic study of bound magnetic polaron formation and the metal-semiconductor transition in EuB 6 journal, August 1997

Controlled Charge Switching on a Single Donor with a Scanning Tunneling Microscope journal, August 2008

Spin-Dependent Electronic States of the Ferromagnetic Semimetal EuB 6 journal, April 2008

Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy journal, June 2017

Effect of charge manipulation on scanning tunneling spectra of single Mn acceptors in InAs journal, March 2008

Termination-dependent surface in-gap states in a potential mixed-valent topological insulator: SmB 6 journal, August 2014

Chemical and valence reconstruction at the surface of SmB 6 revealed by means of resonant soft x-ray reflectometry journal, May 2018

Polarity-Driven Surface Metallicity in SmB 6 journal, November 2013

Magnetic polaron and Fermi surface effects in the spin-flip scattering of EuB 6 journal, October 2004

Lattice Strain Accompanying the Colossal Magnetoresistance Effect in EuB 6 journal, August 2014

Contrast Reversal in Scanning Tunneling Microscopy and Its Implications for the Topological Classification of SmB 6 journal, January 2020

Single Si dopants in GaAs studied by scanning tunneling microscopy and spectroscopy journal, September 2011

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Emergence of a Coherent In-Gap State in the SmB 6 Kondo Insulator Revealed by Scanning Tunneling Spectroscopy journal, March 2014

Hybridization gap and Fano resonance in SmB 6 journal, March 2014

Temperature dependence of lattice constants of the rare-earth hexaborides EuB 6 and GdB 6 journal, April 2001

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Magnetic and defect probes of the SmB 6 surface state journal, November 2018

Full-potential nonorthogonal local-orbital minimum-basis band-structure scheme journal, January 1999

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Multipolar phases and magnetically hidden order: review of the heavy-fermion compound Ce 1− x La x B 6 journal, May 2016

Bulk Band Gaps in Divalent Hexaborides journal, September 2002

Gating the charge state of single Fe dopants in the topological insulator Bi 2 Se 3 with a scanning tunneling microscope journal, July 2012

Charge transport and pressure dependence of Tc of single crystal, ferromagnetic EuB6 journal, March 1980

Absence of X-Point Band Overlap in Divalent Hexaborides and Variability of the Surface Chemical Potential journal, January 2002

Band structure theory of magnetism in 3d-4f compounds journal, May 1998

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Visualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator journal, May 2012

Universality of pseudogap and emergent order in lightly doped Mott insulators journal, September 2016

Imaging emergent heavy Dirac fermions of a topological Kondo insulator journal, November 2019

Metallization and magnetic order in EuB 6 journal, November 2000

Superconductivity mediated by a soft phonon mode: Specific heat, resistivity, thermal expansion, and magnetization of Y B 6 journal, January 2006

Magnetotransport in magnetic semiconductors and possible applications journal, June 2001

Fermi surface of the ferromagnetic semimetal, EuB 6 journal, February 1999

Kondo and anti-Kondo coupling to local moments in EuB 6 journal, April 2004

Observation of a well-defined hybridization gap and in-gap states on the SmB 6 (001) surface journal, June 2018

Structure and magnetic order of EuB 6 journal, March 1998

Large‐area lanthanum hexaboride electron emitter journal, September 1985

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Direct Observation of Friedel Oscillations around Incorporated S i Ga Dopants in GaAs by Low-Temperature Scanning Tunneling Microscopy journal, February 1996

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Title: Visualization of localized perturbations on a (001) surface of the ferromagnetic semimetal ${EuB}_{6}$

Nonlinear Hall Effect as a Signature of Electronic Phase Separation in the Semimetallic Ferromagnet ${EuB}_{6}$
journal, September 2009

Generalized Gradient Approximation Made Simple
journal, October 1996

Evidence for Ferromagnetic Clusters in the Colossal-Magnetoresistance Material ${EuB}_{6}$
journal, June 2018

Topological Kondo Insulators
journal, March 2010

Properties of ${LaB}_{6}$ elucidated by density functional theory
journal, November 2004

Spectroscopic study of bound magnetic polaron formation and the metal-semiconductor transition in ${EuB}_{6}$
journal, August 1997

Controlled Charge Switching on a Single Donor with a Scanning Tunneling Microscope
journal, August 2008

Spin-Dependent Electronic States of the Ferromagnetic Semimetal ${EuB}_{6}$
journal, April 2008

Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy
journal, June 2017

Effect of charge manipulation on scanning tunneling spectra of single Mn acceptors in InAs
journal, March 2008

Termination-dependent surface in-gap states in a potential mixed-valent topological insulator: ${SmB}_{6}$
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Chemical and valence reconstruction at the surface of ${SmB}_{6}$ revealed by means of resonant soft x-ray reflectometry
journal, May 2018

Polarity-Driven Surface Metallicity in ${SmB}_{6}$
journal, November 2013

Magnetic polaron and Fermi surface effects in the spin-flip scattering of ${EuB}_{6}$
journal, October 2004

Lattice Strain Accompanying the Colossal Magnetoresistance Effect in ${EuB}_{6}$
journal, August 2014

Contrast Reversal in Scanning Tunneling Microscopy and Its Implications for the Topological Classification of SmB ₆
journal, January 2020

Single Si dopants in GaAs studied by scanning tunneling microscopy and spectroscopy
journal, September 2011

SmB ₆ : A Promising Candidate for a Topological Insulator
journal, December 2011

Electronic structure of divalent hexaborides
journal, March 1996

Emergence of a Coherent In-Gap State in the ${SmB}_{6}$ Kondo Insulator Revealed by Scanning Tunneling Spectroscopy
journal, March 2014

Hybridization gap and Fano resonance in SmB ₆
journal, March 2014

Temperature dependence of lattice constants of the rare-earth hexaborides EuB ₆ and GdB ₆
journal, April 2001

Fermi surface of ferromagnetic ${EuB}_{6}$
journal, December 1998

Magnetic and defect probes of the SmB ₆ surface state
journal, November 2018

Full-potential nonorthogonal local-orbital minimum-basis band-structure scheme
journal, January 1999

Surface and electronic structure of SmB through scanning tunneling microscopy
journal, April 2016

Electronic properties of $Eu B_{6}$ in the ferromagnetic regime: Half-metal versus semiconductor
journal, December 2005

Multipolar phases and magnetically hidden order: review of the heavy-fermion compound Ce _{1− x} La _x B ₆
journal, May 2016

Bulk Band Gaps in Divalent Hexaborides
journal, September 2002

Gating the charge state of single Fe dopants in the topological insulator Bi $_{2}$ Se $_{3}$ with a scanning tunneling microscope
journal, July 2012

Charge transport and pressure dependence of Tc of single crystal, ferromagnetic EuB6
journal, March 1980

Absence of X-Point Band Overlap in Divalent Hexaborides and Variability of the Surface Chemical Potential
journal, January 2002

Band structure theory of magnetism in 3d-4f compounds
journal, May 1998

Magnetic, transport, and thermal properties of ferromagnetic EuB ₆
journal, March 1979

Visualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator
journal, May 2012

Universality of pseudogap and emergent order in lightly doped Mott insulators
journal, September 2016

Imaging emergent heavy Dirac fermions of a topological Kondo insulator
journal, November 2019

Metallization and magnetic order in ${EuB}_{6}$
journal, November 2000

Superconductivity mediated by a soft phonon mode: Specific heat, resistivity, thermal expansion, and magnetization of $Y B_{6}$
journal, January 2006

Magnetotransport in magnetic semiconductors and possible applications
journal, June 2001

Fermi surface of the ferromagnetic semimetal, ${EuB}_{6}$
journal, February 1999

Kondo and anti-Kondo coupling to local moments in ${EuB}_{6}$
journal, April 2004

Observation of a well-defined hybridization gap and in-gap states on the ${SmB}_{6}$ (001) surface
journal, June 2018

Structure and magnetic order of ${EuB}_{6}$
journal, March 1998

Large‐area lanthanum hexaboride electron emitter
journal, September 1985

Magnetic Semimetals and Quantized Anomalous Hall Effect in ${EuB}_{6}$
journal, February 2020

Direct Observation of Friedel Oscillations around Incorporated S $i_{Ga}$ Dopants in GaAs by Low-Temperature Scanning Tunneling Microscopy
journal, February 1996

Magnetically driven electronic phase separation in the semimetallic ferromagnet EuB $_{6}$
journal, November 2012

Evaluation of evidence for magnetic polarons in ${EuB}_{6}$
journal, September 2004