Isotope effect on electron-phonon interaction in the multiband superconductor MgB2

Mou, Daixiang; Manni, Soham; Taufour, Valentin; Wu, Yun; Huang, Lunan; Bud'ko, S. L.; Canfield, P. C.; Kaminski, Adam

doi:10.1103/PhysRevB.93.144504

Title: Isotope effect on electron-phonon interaction in the multiband superconductor ${MgB}_{2}$

Abstract

We investigate the effect of isotope substitution on the electron-phonon interaction in the multiband superconductor MgB₂ using tunable laser-based angle-resolved photoemission spectroscopy. The kink structure around 70 meV in the σ band, which is caused by electron coupling to the E_2g phonon mode, is shifted to higher binding energy by ~3.5 meV in Mg¹⁰B₂ and the shift is not affected by superconducting transition. Furthermore, these results serve as the benchmark for investigations of isotope effects in known, unconventional superconductors and newly discovered superconductors where the origin of pairing is unknown.

Authors:

Mou, Daixiang ^[1]; Manni, Soham ^[1]; Taufour, Valentin ^[1]; Wu, Yun ^[1]; Huang, Lunan ^[1]; Bud'ko, S. L. ^[1]; Canfield, P. C. ^[1]; Kaminski, Adam ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)

Publication Date:: Thu Apr 07 00:00:00 EDT 2016

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1257374

Alternate Identifier(s):: OSTI ID: 1246187

Report Number(s):: IS-J-8970
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 93; Journal Issue: 14; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Isotope effect on electron-phonon interaction in the multiband superconductor MgB2.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.93.144504.

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                    Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., & Kaminski, Adam. Isotope effect on electron-phonon interaction in the multiband superconductor MgB2.  United States.  https://doi.org/10.1103/PhysRevB.93.144504

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                    Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Thu .  
"Isotope effect on electron-phonon interaction in the multiband superconductor MgB2".  United States.  https://doi.org/10.1103/PhysRevB.93.144504.  https://www.osti.gov/servlets/purl/1257374.

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@article{osti_1257374,

  title        = {Isotope effect on electron-phonon interaction in the multiband superconductor MgB2},

  author       = {Mou, Daixiang and Manni, Soham and Taufour, Valentin and Wu, Yun and Huang, Lunan and Bud'ko, S. L. and Canfield, P. C. and Kaminski, Adam},

  abstractNote = {We investigate the effect of isotope substitution on the electron-phonon interaction in the multiband superconductor MgB2 using tunable laser-based angle-resolved photoemission spectroscopy. The kink structure around 70 meV in the σ band, which is caused by electron coupling to the E2g phonon mode, is shifted to higher binding energy by ~3.5 meV in Mg10B2 and the shift is not affected by superconducting transition. Furthermore, these results serve as the benchmark for investigations of isotope effects in known, unconventional superconductors and newly discovered superconductors where the origin of pairing is unknown.},

  doi          = {10.1103/PhysRevB.93.144504},

  journal      = {Physical Review B},

  number       = 14,

  volume       = 93,

  place        = {United States},

  year         = {Thu Apr 07 00:00:00 EDT 2016},

  month        = {Thu Apr 07 00:00:00 EDT 2016}

}

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Works referenced in this record:

Isotope Effect in the Superconductivity of Mercury
journal, May 1950

Maxwell, Emanuel
Physical Review, Vol. 78, Issue 4
DOI: 10.1103/PhysRev.78.477

Superconductivity of Isotopes of Mercury
journal, May 1950

Reynolds, C. A.; Serin, B.; Wright, W. H.
Physical Review, Vol. 78, Issue 4
DOI: 10.1103/PhysRev.78.487

Theory of the Superconducting State. I. The Ground State at the Absolute Zero of Temperature
journal, September 1950

Fröhlich, H.
Physical Review, Vol. 79, Issue 5
DOI: 10.1103/PhysRev.79.845

Theory of Superconductivity
journal, December 1957

Bardeen, J.; Cooper, L. N.; Schrieffer, J. R.
Physical Review, Vol. 108, Issue 5
DOI: 10.1103/PhysRev.108.1175

Superconductivity at 39 K in magnesium diboride
journal, March 2001

Nagamatsu, Jun; Nakagawa, Norimasa; Muranaka, Takahiro
Nature, Vol. 410, Issue 6824
DOI: 10.1038/35065039

Boron Isotope Effect in Superconducting ${MgB}_{2}$
journal, February 2001

Bud'ko, S. L.; Lapertot, G.; Petrovic, C.
Physical Review Letters, Vol. 86, Issue 9
DOI: 10.1103/PhysRevLett.86.1877

The complex nature of superconductivity in MgB2 as revealed by the reduced total isotope effect
journal, May 2001

Hinks, D. G.; Claus, H.; Jorgensen, J. D.
Nature, Vol. 411, Issue 6836
DOI: 10.1038/35078037

Superconductivity of Metallic Boron in ${MgB}_{2}$
journal, May 2001

Kortus, J.; Mazin, I. I.; Belashchenko, K. D.
Physical Review Letters, Vol. 86, Issue 20
DOI: 10.1103/PhysRevLett.86.4656

The origin of the anomalous superconducting properties of MgB2
journal, August 2002

Choi, Hyoung Joon; Roundy, David; Sun, Hong
Nature, Vol. 418, Issue 6899
DOI: 10.1038/nature00898

A large iron isotope effect in SmFeAsO1 - xF x and Ba1 - xK x Fe2As2
journal, May 2009

Liu, R. H.; Wu, T.; Wu, G.
Nature, Vol. 459, Issue 7243
DOI: 10.1038/nature07981

Inverse Iron Isotope Effect on the Transition Temperature of the $(Ba, K) {Fe}_{2} {As}_{2}$ Superconductor
journal, December 2009

Shirage, Parasharam M.; Kihou, Kunihiro; Miyazawa, Kiichi
Physical Review Letters, Vol. 103, Issue 25
DOI: 10.1103/PhysRevLett.103.257003

Angle-resolved photoemission studies of the cuprate superconductors
journal, April 2003

Damascelli, Andrea; Hussain, Zahid; Shen, Zhi-Xun
Reviews of Modern Physics, Vol. 75, Issue 2
DOI: 10.1103/RevModPhys.75.473

An unusual isotope effect in a high-transition-temperature superconductor
journal, July 2004

Gweon, G. -H.; Sasagawa, T.; Zhou, S. Y.
Nature, Vol. 430, Issue 6996
DOI: 10.1038/nature02731

Unusual oxygen isotope effects in cuprates?
journal, March 2007

Douglas, John F.; Iwasawa, Hideaki; Sun, Zhe
Nature, Vol. 446, Issue 7133
DOI: 10.1038/nature05738

A re-examination of the oxygen isotope effect in ARPES spectra of Bi2212
journal, October 2007

Iwasawa, H.; Aiura, Y.; Saitoh, T.
Physica C: Superconductivity and its Applications, Vol. 463-465
DOI: 10.1016/j.physc.2007.04.228

Isotopic Fingerprint of Electron-Phonon Coupling in High- $T_{c}$ Cuprates
journal, October 2008

Iwasawa, H.; Douglas, J. F.; Sato, K.
Physical Review Letters, Vol. 101, Issue 15
DOI: 10.1103/PhysRevLett.101.157005

Electronic Structure of ${MgB}_{2}$ from Angle-Resolved Photoemission Spectroscopy
journal, April 2002

Uchiyama, H.; Shen, K. M.; Lee, S.
Physical Review Letters, Vol. 88, Issue 15
DOI: 10.1103/PhysRevLett.88.157002

The origin of multiple superconducting gaps in MgB2
journal, May 2003

Souma, S.; Machida, Y.; Sato, T.
Nature, Vol. 423, Issue 6935
DOI: 10.1038/nature01619

Definitive Experimental Evidence for Two-Band Superconductivity in ${M g B}_{2}$
journal, September 2003

Tsuda, S.; Yokoya, T.; Takano, Y.
Physical Review Letters, Vol. 91, Issue 12
DOI: 10.1103/PhysRevLett.91.127001

Strong interaction between electrons and collective excitations in the multiband superconductor ${MgB}_{2}$
journal, April 2015

Mou, Daixiang; Jiang, Rui; Taufour, Valentin
Physical Review B, Vol. 91, Issue 14
DOI: 10.1103/PhysRevB.91.140502

Momentum dependence of the superconducting gap and in-gap states in ${MgB}_{2}$ multiband superconductor
journal, June 2015

Mou, Daixiang; Jiang, Rui; Taufour, Valentin
Physical Review B, Vol. 91, Issue 21
DOI: 10.1103/PhysRevB.91.214519

Single crystals of MgB2: Synthesis, substitutions and properties
journal, June 2007

Karpinski, J.; Zhigadlo, N. D.; Katrych, S.
Physica C: Superconductivity, Vol. 456, Issue 1-2
DOI: 10.1016/j.physc.2007.01.031

Effects of Two-Band Superconductivity on the Flux-Line Lattice in Magnesium Diboride
journal, July 2003

Cubitt, R.; Eskildsen, M. R.; Dewhurst, C. D.
Physical Review Letters, Vol. 91, Issue 4
DOI: 10.1103/PhysRevLett.91.047002

Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy
journal, March 2014

Jiang, Rui; Mou, Daixiang; Wu, Yun
Review of Scientific Instruments, Vol. 85, Issue 3, Article No. 033902
DOI: 10.1063/1.4867517

Superconductivity in ${M g B}_{2}$ : Clean or Dirty?
journal, August 2002

Mazin, I. I.; Andersen, O. K.; Jepsen, O.
Physical Review Letters, Vol. 89, Issue 10
DOI: 10.1103/PhysRevLett.89.107002

Effect of an electron-phonon interaction on the one-electron spectral weight of a d -wave superconductor
journal, March 2004

Sandvik, A. W.; Scalapino, D. J.; Bickers, N. E.
Physical Review B, Vol. 69, Issue 9
DOI: 10.1103/PhysRevB.69.094523

Anharmonicity and self-energy effects of the $E_{2 g}$ phonon in $Mg B_{2}$
journal, January 2007

Mialitsin, A.; Dennis, B. S.; Zhigadlo, N. D.
Physical Review B, Vol. 75, Issue 2
DOI: 10.1103/PhysRevB.75.020509

Beyond Eliashberg Superconductivity in ${MgB}_{2}$ : Anharmonicity, Two-Phonon Scattering, and Multiple Gaps
journal, August 2001

Liu, Amy Y.; Mazin, I. I.; Kortus, Jens
Physical Review Letters, Vol. 87, Issue 8
DOI: 10.1103/PhysRevLett.87.087005

Giant Anharmonicity and Nonlinear Electron-Phonon Coupling in ${MgB}_{2}$ : A Combined First-Principles Calculation and Neutron Scattering Study
journal, June 2001

Yildirim, T.; Gülseren, O.; Lynn, J. W.
Physical Review Letters, Vol. 87, Issue 3
DOI: 10.1103/PhysRevLett.87.037001

Raman spectrum and lattice parameters of ${MgB}_{2}$ as a function of pressure
journal, August 2001

Goncharov, Alexander F.; Struzhkin, Viktor V.; Gregoryanz, Eugene
Physical Review B, Vol. 64, Issue 10
DOI: 10.1103/PhysRevB.64.100509

Anharmonic phonon frequency shift in ${MgB}_{2}$
journal, December 2003

Lazzeri, Michele; Calandra, Matteo; Mauri, Francesco
Physical Review B, Vol. 68, Issue 22
DOI: 10.1103/PhysRevB.68.220509

Phonon Dispersion and Lifetimes in ${M g B}_{2}$
journal, March 2003

Shukla, Abhay; Calandra, Matteo; d’Astuto, Matteo
Physical Review Letters, Vol. 90, Issue 9
DOI: 10.1103/PhysRevLett.90.095506

Anharmonic and non-adiabatic effects in MgB2: Implications for the isotope effect and interpretation of Raman spectra
journal, June 2007

Calandra, Matteo; Lazzeri, Michele; Mauri, Francesco
Physica C: Superconductivity, Vol. 456, Issue 1-2
DOI: 10.1016/j.physc.2007.01.021

Isotope effect on the $E_{2 g}$ phonon and mesoscopic phase separation near the electronic topological transition in ${Mg}_{1 - x} {Al}_{x} B_{2}$
journal, July 2009

Simonelli, L.; Palmisano, V.; Fratini, M.
Physical Review B, Vol. 80, Issue 1
DOI: 10.1103/PhysRevB.80.014520

Works referencing / citing this record:

A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides
journal, February 2019

Gvozdetskyi, Volodymyr; Hanrahan, Michael P.; Ribeiro, Raquel A.
Chemistry – A European Journal, Vol. 25, Issue 16
DOI: 10.1002/chem.201805398

Self-Consistent Two-Gap Description of MgB2 Superconductor
journal, August 2019

Kim, Hyunsoo; Cho, Kyuil; Tanatar, Makariy A.
Symmetry, Vol. 11, Issue 8
DOI: 10.3390/sym11081012

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Title: Isotope effect on electron-phonon interaction in the multiband superconductor MgB 2

Abstract

Citation Formats

Isotope Effect in the Superconductivity of Mercury journal, May 1950

Superconductivity of Isotopes of Mercury journal, May 1950

Theory of the Superconducting State. I. The Ground State at the Absolute Zero of Temperature journal, September 1950

Theory of Superconductivity journal, December 1957

Superconductivity at 39 K in magnesium diboride journal, March 2001

Boron Isotope Effect in Superconducting MgB 2 journal, February 2001

The complex nature of superconductivity in MgB2 as revealed by the reduced total isotope effect journal, May 2001

Superconductivity of Metallic Boron in MgB 2 journal, May 2001

The origin of the anomalous superconducting properties of MgB2 journal, August 2002

A large iron isotope effect in SmFeAsO1 - xF x and Ba1 - xK x Fe2As2 journal, May 2009

Inverse Iron Isotope Effect on the Transition Temperature of the ( Ba , K ) Fe 2 As 2 Superconductor journal, December 2009

Angle-resolved photoemission studies of the cuprate superconductors journal, April 2003

An unusual isotope effect in a high-transition-temperature superconductor journal, July 2004

Unusual oxygen isotope effects in cuprates? journal, March 2007

A re-examination of the oxygen isotope effect in ARPES spectra of Bi2212 journal, October 2007

Isotopic Fingerprint of Electron-Phonon Coupling in High- T c Cuprates journal, October 2008

Electronic Structure of MgB 2 from Angle-Resolved Photoemission Spectroscopy journal, April 2002

The origin of multiple superconducting gaps in MgB2 journal, May 2003

Definitive Experimental Evidence for Two-Band Superconductivity in M g B 2 journal, September 2003

Strong interaction between electrons and collective excitations in the multiband superconductor MgB 2 journal, April 2015

Momentum dependence of the superconducting gap and in-gap states in MgB 2 multiband superconductor journal, June 2015

Single crystals of MgB2: Synthesis, substitutions and properties journal, June 2007

Effects of Two-Band Superconductivity on the Flux-Line Lattice in Magnesium Diboride journal, July 2003

Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy journal, March 2014

Superconductivity in M g B 2 : Clean or Dirty? journal, August 2002

Effect of an electron-phonon interaction on the one-electron spectral weight of a d -wave superconductor journal, March 2004

Anharmonicity and self-energy effects of the E 2 g phonon in Mg B 2 journal, January 2007

Beyond Eliashberg Superconductivity in MgB 2 : Anharmonicity, Two-Phonon Scattering, and Multiple Gaps journal, August 2001

Giant Anharmonicity and Nonlinear Electron-Phonon Coupling in MgB 2 : A Combined First-Principles Calculation and Neutron Scattering Study journal, June 2001

Raman spectrum and lattice parameters of MgB 2 as a function of pressure journal, August 2001

Anharmonic phonon frequency shift in MgB 2 journal, December 2003

Phonon Dispersion and Lifetimes in M g B 2 journal, March 2003

Anharmonic and non-adiabatic effects in MgB2: Implications for the isotope effect and interpretation of Raman spectra journal, June 2007

Isotope effect on the E 2 g phonon and mesoscopic phase separation near the electronic topological transition in Mg 1 − x Al x B 2 journal, July 2009

A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides journal, February 2019

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Title: Isotope effect on electron-phonon interaction in the multiband superconductor ${MgB}_{2}$

Isotope Effect in the Superconductivity of Mercury
journal, May 1950

Superconductivity of Isotopes of Mercury
journal, May 1950

Theory of the Superconducting State. I. The Ground State at the Absolute Zero of Temperature
journal, September 1950

Theory of Superconductivity
journal, December 1957

Superconductivity at 39 K in magnesium diboride
journal, March 2001

Boron Isotope Effect in Superconducting ${MgB}_{2}$
journal, February 2001

The complex nature of superconductivity in MgB2 as revealed by the reduced total isotope effect
journal, May 2001

Superconductivity of Metallic Boron in ${MgB}_{2}$
journal, May 2001

The origin of the anomalous superconducting properties of MgB2
journal, August 2002

A large iron isotope effect in SmFeAsO1 - xF x and Ba1 - xK x Fe2As2
journal, May 2009

Inverse Iron Isotope Effect on the Transition Temperature of the $(Ba, K) {Fe}_{2} {As}_{2}$ Superconductor
journal, December 2009

Angle-resolved photoemission studies of the cuprate superconductors
journal, April 2003

An unusual isotope effect in a high-transition-temperature superconductor
journal, July 2004

Unusual oxygen isotope effects in cuprates?
journal, March 2007

A re-examination of the oxygen isotope effect in ARPES spectra of Bi2212
journal, October 2007

Isotopic Fingerprint of Electron-Phonon Coupling in High- $T_{c}$ Cuprates
journal, October 2008

Electronic Structure of ${MgB}_{2}$ from Angle-Resolved Photoemission Spectroscopy
journal, April 2002

The origin of multiple superconducting gaps in MgB2
journal, May 2003

Definitive Experimental Evidence for Two-Band Superconductivity in ${M g B}_{2}$
journal, September 2003

Strong interaction between electrons and collective excitations in the multiband superconductor ${MgB}_{2}$
journal, April 2015

Momentum dependence of the superconducting gap and in-gap states in ${MgB}_{2}$ multiband superconductor
journal, June 2015

Single crystals of MgB2: Synthesis, substitutions and properties
journal, June 2007

Effects of Two-Band Superconductivity on the Flux-Line Lattice in Magnesium Diboride
journal, July 2003

Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy
journal, March 2014

Superconductivity in ${M g B}_{2}$ : Clean or Dirty?
journal, August 2002

Effect of an electron-phonon interaction on the one-electron spectral weight of a d -wave superconductor
journal, March 2004

Anharmonicity and self-energy effects of the $E_{2 g}$ phonon in $Mg B_{2}$
journal, January 2007

Beyond Eliashberg Superconductivity in ${MgB}_{2}$ : Anharmonicity, Two-Phonon Scattering, and Multiple Gaps
journal, August 2001

Giant Anharmonicity and Nonlinear Electron-Phonon Coupling in ${MgB}_{2}$ : A Combined First-Principles Calculation and Neutron Scattering Study
journal, June 2001

Raman spectrum and lattice parameters of ${MgB}_{2}$ as a function of pressure
journal, August 2001

Anharmonic phonon frequency shift in ${MgB}_{2}$
journal, December 2003

Phonon Dispersion and Lifetimes in ${M g B}_{2}$
journal, March 2003

Anharmonic and non-adiabatic effects in MgB2: Implications for the isotope effect and interpretation of Raman spectra
journal, June 2007

Isotope effect on the $E_{2 g}$ phonon and mesoscopic phase separation near the electronic topological transition in ${Mg}_{1 - x} {Al}_{x} B_{2}$
journal, July 2009

A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides
journal, February 2019

Self-Consistent Two-Gap Description of MgB2 Superconductor
journal, August 2019