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Title: Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors

Abstract

The level of electronic correlation has been one of the key questions in understanding the nature of superconductivity. Among the iron-based superconductors, the iron chalcogenide family exhibits the strongest electron correlations. To gauge the correlation strength, we performed a systematic angle-resolved photoemission spectroscopy study on the iron chalcogenide series Fe1+ySexTe1-x (0 < x < 0.59), a model system with the simplest structure. Our measurement reveals an incoherent-to-coherent crossover in the electronic structure as the selenium ratio increases and the system evolves from a weakly localized to a more itinerant state. Furthermore, we found that the effective mass of bands dominated by the dxy orbital character significantly decreases with increasing selenium ratio, as compared to the dxz/dyz orbital-dominated bands. The orbital-dependent change in the correlation level agrees with theoretical calculations on the band structure renormalization, and may help to understand the onset of superconductivity in Fe1+ySexTe1-x.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [10];  [11];  [3];  [8];  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Tulane Univ., New Orleans, LA (United States)
  4. Renmin Univ. of China, Beijing (China); Rice Univ., Houston, TX (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Boston College, Chestnut Hill, MA (United States)
  7. Univ. of Oxford (United Kingdom)
  8. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  10. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  11. Rice Univ., Houston, TX (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1393003
Alternate Identifier(s):
OSTI ID: 1234087
Grant/Contract Number:  
AC02-05CH11231; AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 23; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Z. K., Yi, M., Zhang, Y., Hu, J., Yu, R., Zhu, J. -X., He, R. -H., Chen, Y. L., Hashimoto, M., Moore, R. G., Mo, S. -K., Hussain, Z., Si, Q., Mao, Z. Q., Lu, D. H., and Shen, Z. -X. Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.235138.
Liu, Z. K., Yi, M., Zhang, Y., Hu, J., Yu, R., Zhu, J. -X., He, R. -H., Chen, Y. L., Hashimoto, M., Moore, R. G., Mo, S. -K., Hussain, Z., Si, Q., Mao, Z. Q., Lu, D. H., & Shen, Z. -X. Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors. United States. https://doi.org/10.1103/PhysRevB.92.235138
Liu, Z. K., Yi, M., Zhang, Y., Hu, J., Yu, R., Zhu, J. -X., He, R. -H., Chen, Y. L., Hashimoto, M., Moore, R. G., Mo, S. -K., Hussain, Z., Si, Q., Mao, Z. Q., Lu, D. H., and Shen, Z. -X. 2015. "Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors". United States. https://doi.org/10.1103/PhysRevB.92.235138. https://www.osti.gov/servlets/purl/1393003.
@article{osti_1393003,
title = {Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors},
author = {Liu, Z. K. and Yi, M. and Zhang, Y. and Hu, J. and Yu, R. and Zhu, J. -X. and He, R. -H. and Chen, Y. L. and Hashimoto, M. and Moore, R. G. and Mo, S. -K. and Hussain, Z. and Si, Q. and Mao, Z. Q. and Lu, D. H. and Shen, Z. -X.},
abstractNote = {The level of electronic correlation has been one of the key questions in understanding the nature of superconductivity. Among the iron-based superconductors, the iron chalcogenide family exhibits the strongest electron correlations. To gauge the correlation strength, we performed a systematic angle-resolved photoemission spectroscopy study on the iron chalcogenide series Fe1+ySexTe1-x (0 < x < 0.59), a model system with the simplest structure. Our measurement reveals an incoherent-to-coherent crossover in the electronic structure as the selenium ratio increases and the system evolves from a weakly localized to a more itinerant state. Furthermore, we found that the effective mass of bands dominated by the dxy orbital character significantly decreases with increasing selenium ratio, as compared to the dxz/dyz orbital-dominated bands. The orbital-dependent change in the correlation level agrees with theoretical calculations on the band structure renormalization, and may help to understand the onset of superconductivity in Fe1+ySexTe1-x.},
doi = {10.1103/PhysRevB.92.235138},
url = {https://www.osti.gov/biblio/1393003}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 23,
volume = 92,
place = {United States},
year = {Tue Dec 22 00:00:00 EST 2015},
month = {Tue Dec 22 00:00:00 EST 2015}
}

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Cited by: 36 works
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Works referenced in this record:

Mott transition in multiorbital models for iron pnictides
journal, December 2011


Orbital-Selective Mott Transitions in the Degenerate Hubbard Model
journal, May 2004


Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
journal, July 2015


Disappearance of static magnetic order and evolution of spin fluctuations in Fe 1 + δ Se x Te 1 x
journal, September 2010


Electronic properties of single-crystalline Fe 1.05 Te and Fe 1.03 Se 0.30 Te 0.70
journal, April 2009


Review of Fe Chalcogenides as the Simplest Fe-Based Superconductor
journal, October 2010


Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity
journal, October 2008


Theoretical evidence for strong correlations and incoherent metallic state in FeSe
journal, August 2010


Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
journal, September 2011


Electron correlation in the FeSe superconductor studied by bulk-sensitive photoemission spectroscopy
journal, November 2010


Doping Dependence of an n -Type Cuprate Superconductor Investigated by Angle-Resolved Photoemission Spectroscopy
journal, June 2002


Local inhomogeneity and surface degradation of Fe1.15Te and Fe1.03Te0.62Se0.38 single crystals
journal, July 2011


Doping-Dependent and Orbital-Dependent Band Renormalization in Ba(Fe 1- x Co x ) 2 As 2 Superconductors
journal, November 2011


Orbital-Selective Mott Transition out of Band Degeneracy Lifting
journal, March 2009


Coupling of electronic and magnetic properties in Fe 1 + y (Te 1 x Se x )
journal, September 2013


Missing Quasiparticles and the Chemical Potential Puzzle in the Doping Evolution of the Cuprate Superconductors
journal, December 2004


High-temperature superconductivity in iron-based materials
journal, August 2010


First-order magnetic and structural phase transitions in Fe 1 + y Se x Te 1 x
journal, February 2009


Orbital-selective Mott transition in multiband systems: Slave-spin representation and dynamical mean-field theory
journal, November 2005


Unusual band renormalization in the simplest iron-based superconductor FeSe 1 x
journal, June 2014


Orbital-selective Mott-insulator transition in Ca 2 - x Sr x RuO 4
journal, February 2002


Charge-carrier localization induced by excess Fe in the superconductor Fe 1 + y Te 1 x Se x
journal, November 2009


Works referencing / citing this record:

Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
journal, July 2015


Orbital-selective pairing and superconductivity in iron selenides
journal, May 2017


A strongly inhomogeneous superfluid in an iron-based superconductor
journal, July 2019


Exploring itinerant states in divalent hexaborides using rare-earth L edge resonant inelastic x-ray scattering
journal, December 2019


Orbital selective pairing and gap structures of iron-based superconductors
journal, May 2017


Discovery of orbital-selective Cooper pairing in FeSe
journal, July 2017


Interplay of nematic and magnetic orders in FeSe under pressure
text, January 2016