skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on November 21, 2020

Title: Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr 2 IrO 4

Abstract

The pseudogap, d-wave superconductivity and electron-boson coupling are three intertwined key ingredients in the phase diagram of the cuprates. Sr 2IrO 4 is a 5d-electron counterpart of the cuprates in which both the pseudogap and a d-wave instability have been observed. Here, we report spectroscopic evidence for the presence of the third key player in electron-doped Sr 2IrO 4: electron-boson coupling. A kink in nodal dispersion is observed with an energy scale of ~50 meV. The strength of the kink changes with doping, but the energy scale remains the same. Furthermore, these results provide the first noncuprate platform for exploring the relationship between the pseudogap, d-wave instability, and electron-boson coupling in doped Mott insulators.

Authors:
 [1];  [2];  [1];  [3];  [3];  [1];  [4];  [4];  [5];  [5];  [1];  [3];  [5];  [1];  [6];  [3];  [2]; ORCiD logo [1]
  1. Univ. of Science and Technology of China, Anhui (China)
  2. Univ. of California, Santa Barbara, CA (United States)
  3. Northeastern Univ., Boston, MA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Hiroshima Univ. (Japan)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1596337
Alternate Identifier(s):
OSTI ID: 1575802
Grant/Contract Number:  
[AC02-76SF00515; FG02-07ER46352; AC02-05CH11231; DMR-1905801]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
[ Journal Volume: 123; Journal Issue: 21]; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Pseudogap; Quasiparticles & collective excitations; Spin-orbit coupling; Superconductivity; Mott insulators; Single crystal materials; Strongly correlated systems; Angle-resolved photoemission spectroscopy; First-principles calculations

Citation Formats

Hu, Yong, Chen, Xiang, Peng, S. -T., Lane, C., Matzelle, M., Sun, Z. -L., Hashimoto, M., Lu, D. -H., Schwier, E. F., Arita, M., Wu, T., Markiewicz, R. S., Shimada, K., Chen, X. -H., Shen, Z. -X., Bansil, A., Wilson, S. D., and He, J. -F. Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr2IrO4. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.216402.
Hu, Yong, Chen, Xiang, Peng, S. -T., Lane, C., Matzelle, M., Sun, Z. -L., Hashimoto, M., Lu, D. -H., Schwier, E. F., Arita, M., Wu, T., Markiewicz, R. S., Shimada, K., Chen, X. -H., Shen, Z. -X., Bansil, A., Wilson, S. D., & He, J. -F. Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr2IrO4. United States. doi:10.1103/PhysRevLett.123.216402.
Hu, Yong, Chen, Xiang, Peng, S. -T., Lane, C., Matzelle, M., Sun, Z. -L., Hashimoto, M., Lu, D. -H., Schwier, E. F., Arita, M., Wu, T., Markiewicz, R. S., Shimada, K., Chen, X. -H., Shen, Z. -X., Bansil, A., Wilson, S. D., and He, J. -F. Thu . "Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr2IrO4". United States. doi:10.1103/PhysRevLett.123.216402.
@article{osti_1596337,
title = {Spectroscopic Evidence for Electron-Boson Coupling in Electron-Doped Sr2IrO4},
author = {Hu, Yong and Chen, Xiang and Peng, S. -T. and Lane, C. and Matzelle, M. and Sun, Z. -L. and Hashimoto, M. and Lu, D. -H. and Schwier, E. F. and Arita, M. and Wu, T. and Markiewicz, R. S. and Shimada, K. and Chen, X. -H. and Shen, Z. -X. and Bansil, A. and Wilson, S. D. and He, J. -F.},
abstractNote = {The pseudogap, d-wave superconductivity and electron-boson coupling are three intertwined key ingredients in the phase diagram of the cuprates. Sr2IrO4 is a 5d-electron counterpart of the cuprates in which both the pseudogap and a d-wave instability have been observed. Here, we report spectroscopic evidence for the presence of the third key player in electron-doped Sr2IrO4: electron-boson coupling. A kink in nodal dispersion is observed with an energy scale of ~50 meV. The strength of the kink changes with doping, but the energy scale remains the same. Furthermore, these results provide the first noncuprate platform for exploring the relationship between the pseudogap, d-wave instability, and electron-boson coupling in doped Mott insulators.},
doi = {10.1103/PhysRevLett.123.216402},
journal = {Physical Review Letters},
number = [21],
volume = [123],
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 21, 2020
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Abrupt onset of a second energy gap at the superconducting transition of underdoped Bi2212
journal, November 2007


Structural and magnetic studies of Sr 2 IrO 4
journal, April 1994


Novel J eff = 1 / 2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr 2 IrO 4
journal, August 2008


Renormalization of Spectral Line Shape and Dispersion below T c in Bi 2 Sr 2 CaCu 2 O 8 + δ
journal, February 2001


Rapid change of superconductivity and electron-phonon coupling through critical doping in Bi-2212
journal, October 2018


Evidence of an odd-parity hidden order in a spin–orbit coupled correlated iridate
journal, October 2015

  • Zhao, L.; Torchinsky, D. H.; Chu, H.
  • Nature Physics, Vol. 12, Issue 1
  • DOI: 10.1038/nphys3517

Ab initio molecular dynamics for open-shell transition metals
journal, November 1993


Role of the electron-phonon interaction in the strongly correlated cuprate superconductors
journal, September 2002


Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996


Neutron scattering from magnetic excitations in Bi2Sr2CaCu2O8+δ
journal, April 1999

  • Fong, H. F.; Bourges, P.; Sidis, Y.
  • Nature, Vol. 398, Issue 6728
  • DOI: 10.1038/19255

Raman scattering study of vibrational and magnetic excitations in Sr 2 x La x IrO 4
journal, September 2017


Weak ferromagnetism, metal-to-nonmetal transition, and negative differential resistivity in single-crystal Sr 2 IrO 4
journal, May 1998


Anomalously large gap anisotropy in the a - b plane of Bi 2 Sr 2 CaCu 2 O 8 + δ
journal, March 1993


Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr 2 x La x IrO 4
journal, July 2017


Evidence for an Energy Scale for Quasiparticle Dispersion in Bi 2 Sr 2 CaCu 2 O 8
journal, September 2000


Momentum Dependence of the Superconducting Gap in Bi 2 Sr 2 CaCu 2 O 8
journal, April 1995


Strength of the spin-fluctuation-mediated pairing interaction in a high-temperature superconductor
journal, January 2009

  • Dahm, T.; Hinkov, V.; Borisenko, S. V.
  • Nature Physics, Vol. 5, Issue 3
  • DOI: 10.1038/nphys1180

Doping and Temperature Dependence of the Mass Enhancement Observed in the Cuprate Bi 2 Sr 2 CaCu 2 O 8 + δ
journal, October 2001


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


Direct spectroscopic evidence for phase competition between the pseudogap and superconductivity in Bi2Sr2CaCu2O8+δ
journal, November 2014

  • Hashimoto, Makoto; Nowadnick, Elizabeth A.; He, Rui-Hua
  • Nature Materials, Vol. 14, Issue 1
  • DOI: 10.1038/nmat4116

Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors
journal, August 2001

  • Lanzara, A.; Bogdanov, P. V.; Zhou, X. J.
  • Nature, Vol. 412, Issue 6846
  • DOI: 10.1038/35087518

Phase-Sensitive Observation of a Spin-Orbital Mott State in Sr2IrO4
journal, March 2009


Collapse of the Mott Gap and Emergence of a Nodal Liquid in Lightly Doped Sr 2 IrO 4
journal, October 2015


Electron-Doped Sr 2 IrO 4 : An Analogue of Hole-Doped Cuprate Superconductors Demonstrated by Scanning Tunneling Microscopy
journal, November 2015


Evolution of the pseudogap from Fermi arcs to the nodal liquid
journal, June 2006

  • Kanigel, A.; Norman, M. R.; Randeria, M.
  • Nature Physics, Vol. 2, Issue 7
  • DOI: 10.1038/nphys334

Twisted Hubbard Model for Sr 2 IrO 4 : Magnetism and Possible High Temperature Superconductivity
journal, March 2011


Fermi arcs in a doped pseudospin-1/2 Heisenberg antiferromagnet
journal, June 2014


Observation of a d-wave gap in electron-doped Sr2IrO4
journal, October 2015

  • Kim, Y. K.; Sung, N. H.; Denlinger, J. D.
  • Nature Physics, Vol. 12, Issue 1
  • DOI: 10.1038/nphys3503

Transfer of spectral weight across the gap of Sr 2 IrO 4 induced by La doping
journal, August 2015


Systematic study of electron-phonon coupling to oxygen modes across the cuprates
journal, August 2010


Unidirectional spin density wave state in metallic (Sr1−xLax)2IrO4
journal, January 2018


Influence of electron doping on the ground state of ( Sr 1 x La x ) 2 IrO 4
journal, August 2015


Monte Carlo Study of an Unconventional Superconducting Phase in Iridium Oxide J eff = 1 / 2 Mott Insulators Induced by Carrier Doping
journal, January 2013


Progress and perspectives on electron-doped cuprates
journal, September 2010


Excitation Gap in the Normal State of Underdoped Bi2Sr2CaCu2O8+delta
journal, July 1996


Anisotropic softening of magnetic excitations in lightly electron-doped Sr 2 IrO 4
journal, June 2016


Persistent Paramagnons Deep in the Metallic Phase of Sr 2 x La x IrO 4
journal, September 2016


Spectroscopic evidence for a pseudogap in the normal state of underdoped high-Tc superconductors
journal, July 1996

  • Ding, H.; Yokoya, T.; Campuzano, J. C.
  • Nature, Vol. 382, Issue 6586
  • DOI: 10.1038/382051a0

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