Low-temperature conducting state in two candidate topological Kondo insulators: SmB6 and Ce3Bi4Pt3

doi:10.1103/PhysRevB.94.035127

Title: Low-temperature conducting state in two candidate topological Kondo insulators: ${SmB}_{6}$ and ${Ce}_{3} {Bi}_{4} {Pt}_{3}$

Abstract

We have investigated the low temperature conducting state of two Kondo insulators, SmB₆ and Ce₃Bi₄Pt₃, which have been theoretically predicted to host topological surface states. Through comparison of the speci c heat of as-grown and powdered single crystals of SmB₆, we show that the residual term that is linear in temperature is not dominated by any surface state contribution, but rather is a bulk property. In Ce₃Bi₄Pt₃, we find that the Hall coefficient is independent of sample thickness, which indicates that conduction at low temperatures is dominated by the bulk of the sample, and not by a surface state. The low temperature resistivity of Ce₃Bi₄Pt₃ is found to monotonically decrease with low concentrations of disorder introduced through ion-irradiation. This is in contrast to SmB₆, which is again indicative of the contrasting origins of the low temperature conduction. In SmB₆, we also show that the effect of low concentrations of irradiation damage of the surface with Fe⁺ ions is qualitatively consistent with damage with non-magnetic ions.

Authors:

Wakeham, N. ^[1]; Rosa, P. F. S. ^[1]; Wang, Y. Q. ^[1]; Kang, M. ^[1]; Fisk, Z. ^[2]; Ronning, F. ^[1]; Thompson, J. D. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of California, Irvine, CA (United States)

Publication Date:: 2016-07-12

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1414091

Alternate Identifier(s):: OSTI ID: 1261700

Report Number(s):: LA-UR-16-22744
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1800626

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 94; Journal Issue: 3; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Wakeham, N., Rosa, P. F.  S., Wang, Y. Q., Kang, M., Fisk, Z., Ronning, F., and Thompson, J. D. Low-temperature conducting state in two candidate topological Kondo insulators: SmB6 and Ce3Bi4Pt3.  United States: N. p., 2016. 
        Web.  doi:10.1103/PhysRevB.94.035127.

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                    Wakeham, N., Rosa, P. F.  S., Wang, Y. Q., Kang, M., Fisk, Z., Ronning, F., & Thompson, J. D. Low-temperature conducting state in two candidate topological Kondo insulators: SmB6 and Ce3Bi4Pt3.  United States.  doi:10.1103/PhysRevB.94.035127.

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                    Wakeham, N., Rosa, P. F.  S., Wang, Y. Q., Kang, M., Fisk, Z., Ronning, F., and Thompson, J. D. Tue .  
        "Low-temperature conducting state in two candidate topological Kondo insulators: SmB6 and Ce3Bi4Pt3".  United States.  doi:10.1103/PhysRevB.94.035127.  https://www.osti.gov/servlets/purl/1414091.

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@article{osti_1414091,

  title        = {Low-temperature conducting state in two candidate topological Kondo insulators: SmB6 and Ce3Bi4Pt3},

  author       = {Wakeham, N. and Rosa, P. F.  S. and Wang, Y. Q. and Kang, M. and Fisk, Z. and Ronning, F. and Thompson, J. D.},

  abstractNote = {We have investigated the low temperature conducting state of two Kondo insulators, SmB6 and Ce3Bi4Pt3, which have been theoretically predicted to host topological surface states. Through comparison of the speci c heat of as-grown and powdered single crystals of SmB6, we show that the residual term that is linear in temperature is not dominated by any surface state contribution, but rather is a bulk property. In Ce3Bi4Pt3, we find that the Hall coefficient is independent of sample thickness, which indicates that conduction at low temperatures is dominated by the bulk of the sample, and not by a surface state. The low temperature resistivity of Ce3Bi4Pt3 is found to monotonically decrease with low concentrations of disorder introduced through ion-irradiation. This is in contrast to SmB6, which is again indicative of the contrasting origins of the low temperature conduction. In SmB6, we also show that the effect of low concentrations of irradiation damage of the surface with Fe+ ions is qualitatively consistent with damage with non-magnetic ions.},

  doi          = {10.1103/PhysRevB.94.035127},

  journal      = {Physical Review B},

  number       = 3,

  volume       = 94,

  place        = {United States},

  year         = {2016},

  month        = {7}

}

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DOI: 10.1103/PhysRevB.94.035127

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Title: Low-temperature conducting state in two candidate topological Kondo insulators: SmB 6 and Ce 3 Bi 4 Pt 3

Abstract

Citation Formats

The effect of magnetic and non-magnetic ion damage on the surface state in SmB6 journal, February 2016

Closing the spin gap in the Kondo insulator Ce3Bi4Pt3 at high magnetic fields journal, May 2000

Topological Kondo Insulators journal, March 2010

Insulator-to-metal transition in SmB6 induced by neutron irradiation journal, September 2007

The birth of topological insulators journal, March 2010

Effects of doping in Kondo insulators (invited) journal, May 1994

Topological surface state in the Kondo insulator samarium hexaboride journal, March 2014

Modification and Control of Topological Insulator Surface States Using Surface Disorder journal, June 2015

Surface Hall Effect and Nonlocal Transport in SmB6: Evidence for Surface Conduction journal, November 2013

Surface state reconstruction in ion-damaged SmB 6 journal, February 2015

Valence Fluctuating State in SmB 6 journal, May 1979

Specific heat of GE 7031 varnish (4 – 18 K) journal, October 1971

Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6 journal, December 2013

Topological Insulator Materials journal, October 2013

Topological Insulators in Three Dimensions journal, March 2007

Topological surface states protected from backscattering by chiral spin texture journal, August 2009

A new exotic state in an old material: a tale of SmB6 journal, September 2013

Correlation between Bulk Thermodynamic Measurements and the Low-Temperature-Resistance Plateau in SmB 6 journal, July 2014

Tuning Bulk and Surface Conduction in the Proposed Topological Kondo Insulator SmB 6 journal, March 2015

Growth of single crystals from metallic fluxes journal, June 1992

SRIM – The stopping and range of ions in matter (2010) journal, June 2010

Destruction of the gap in the intermediate valence compound SmB6 by neutron irradiation journal, October 1983

Low-temperature surface conduction in the Kondo insulator SmB 6 journal, November 2013

Kondo Breakdown and Quantum Oscillations in SmB 6 journal, January 2016

Topological Kondo Insulators journal, March 2016

Studies of the Kondo insulator Ce3Bi4Pt3 in 61 T pulsed magnetic fields journal, May 1995

Scanning tunneling spectroscopy and surface quasiparticle interference in models for the strongly correlated topological insulators SmB 6 and PuB 6 journal, November 2014

Direct observation of the spin texture in SmB6 as evidence of the topological Kondo insulator journal, July 2014

Fate of topological-insulator surface states under strong disorder journal, May 2012

Observation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission journal, December 2013

Mixed-valence insulators with neutral Fermi surfaces journal, May 2018

Magnetic field-tuned Fermi liquid in a Kondo insulator journal, December 2019

Topological phase transition in the archetypal f -electron correlated system of cerium journal, November 2019

Pressure-driven valence increase and metallization in the Kondo insulator Ce 3 Bi 4 Pt 3 journal, December 2019

Anomalous three-dimensional bulk ac conduction within the Kondo gap of SmB 6 single crystals journal, October 2016

Quantum spin fluctuations in the bulk insulating state of pure and Fe-doped SmB 6 journal, June 2017

Isosbestic points in doped Sm B 6 as features of universality and property tuning journal, September 2017

Quantum oscillations in insulators with neutral Fermi surfaces journal, January 2018

Physical properties of Sm x B 6 single crystals journal, January 2019

Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling journal, June 2017

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Quantum Oscillations in Flux-Grown SmB 6 with Embedded Aluminum journal, April 2019

Title: Low-temperature conducting state in two candidate topological Kondo insulators: ${SmB}_{6}$ and ${Ce}_{3} {Bi}_{4} {Pt}_{3}$

The effect of magnetic and non-magnetic ion damage on the surface state in SmB6
journal, February 2016

Closing the spin gap in the Kondo insulator Ce3Bi4Pt3 at high magnetic fields
journal, May 2000

Topological Kondo Insulators
journal, March 2010

Insulator-to-metal transition in SmB6 induced by neutron irradiation
journal, September 2007

The birth of topological insulators
journal, March 2010

Effects of doping in Kondo insulators (invited)
journal, May 1994

Topological surface state in the Kondo insulator samarium hexaboride
journal, March 2014

Modification and Control of Topological Insulator Surface States Using Surface Disorder
journal, June 2015

Surface Hall Effect and Nonlocal Transport in SmB6: Evidence for Surface Conduction
journal, November 2013

Surface state reconstruction in ion-damaged ${SmB}_{6}$
journal, February 2015

Valence Fluctuating State in SmB ₆
journal, May 1979

Specific heat of GE 7031 varnish (4 – 18 K)
journal, October 1971

Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6
journal, December 2013

Topological Insulator Materials
journal, October 2013

Topological Insulators in Three Dimensions
journal, March 2007

Topological surface states protected from backscattering by chiral spin texture
journal, August 2009

A new exotic state in an old material: a tale of SmB6
journal, September 2013

Correlation between Bulk Thermodynamic Measurements and the Low-Temperature-Resistance Plateau in ${SmB}_{6}$
journal, July 2014

Tuning Bulk and Surface Conduction in the Proposed Topological Kondo Insulator ${SmB}_{6}$
journal, March 2015

Growth of single crystals from metallic fluxes
journal, June 1992

SRIM – The stopping and range of ions in matter (2010)
journal, June 2010

Destruction of the gap in the intermediate valence compound SmB6 by neutron irradiation
journal, October 1983

Low-temperature surface conduction in the Kondo insulator SmB $_{6}$
journal, November 2013

Kondo Breakdown and Quantum Oscillations in ${SmB}_{6}$
journal, January 2016

Topological Kondo Insulators
journal, March 2016

Studies of the Kondo insulator Ce3Bi4Pt3 in 61 T pulsed magnetic fields
journal, May 1995

Scanning tunneling spectroscopy and surface quasiparticle interference in models for the strongly correlated topological insulators ${SmB}_{6}$ and ${PuB}_{6}$
journal, November 2014

Direct observation of the spin texture in SmB6 as evidence of the topological Kondo insulator
journal, July 2014

Fate of topological-insulator surface states under strong disorder
journal, May 2012

Observation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission
journal, December 2013

Mixed-valence insulators with neutral Fermi surfaces
journal, May 2018

Magnetic field-tuned Fermi liquid in a Kondo insulator
journal, December 2019

Topological phase transition in the archetypal $f$ -electron correlated system of cerium
journal, November 2019

Pressure-driven valence increase and metallization in the Kondo insulator ${Ce}_{3} {Bi}_{4} {Pt}_{3}$
journal, December 2019

Anomalous three-dimensional bulk ac conduction within the Kondo gap of ${SmB}_{6}$ single crystals
journal, October 2016

Quantum spin fluctuations in the bulk insulating state of pure and Fe-doped ${SmB}_{6}$
journal, June 2017

Isosbestic points in doped $Sm B_{6}$ as features of universality and property tuning
journal, September 2017

Quantum oscillations in insulators with neutral Fermi surfaces
journal, January 2018

Physical properties of ${Sm}_{x} B_{6}$ single crystals
journal, January 2019

Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
journal, June 2017

Quantum Oscillation from In-Gap States and a Non-Hermitian Landau Level Problem
journal, July 2018

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journal, April 2019