Orbital-differentiated coherence-incoherence crossover identified by photoemission spectroscopy in LiFeAs

Miao, H.; Yin, Z. P.; Wu, S. F.; Li, J. M.; Ma, J.; Lv, B. -Q.; Wang, X. P.; Qian, T.; Richard, P.; Xing, L. -Y.; Wang, X. -C.; Jin, C. Q.; Haule, K.; Kotliar, G.; Ding, H.

doi:10.1103/PhysRevB.94.201109

Title: Orbital-differentiated coherence-incoherence crossover identified by photoemission spectroscopy in LiFeAs

Journal Article · Mon Nov 14 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.201109· OSTI ID:1342635

Miao, H. ^[1]; Yin, Z. P. ^[2]; Wu, S. F. ^[3]; Li, J. M. ^[3]; Ma, J. ^[3]; Lv, B. -Q. ^[3]; Wang, X. P. ^[4]; Qian, T. ^[3]; Richard, P. ^[5]; Xing, L. -Y. ^[3]; Wang, X. -C. ^[3]; Jin, C. Q. ^[6]; Haule, K. ^[7]; Kotliar, G. ^[8]; Ding, H. ^[5]

Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy; Beijing Normal Univ., Beijing (China). Dept. of Physics and the Center of Advanced Quantum Studies
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Collaborative Innovation Center of Quantum Matter, Beijing (China); Tsinghua Univ., Beijing (China). Dept. of Physics
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Collaborative Innovation Center of Quantum Matter, Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy

In the iron-based superconductors (FeSCs), orbital differentiation is an important phenomenon, whereby correlations stronger on the d_xy orbital than on the d_xz/d_yz orbital yield quasi-particles with d_xy orbital character having larger mass renormalization and abnormal temperature evolution. However, the physical origin of this orbital di erentiation is debated between the Hund's coupling induced unbinding of spin and orbital degrees of freedom and the Hubbard interaction instigated orbital selective Mott transition. Here we use angle-resolved photoemission spectroscopy to identify an orbital-dependent correlation-induced quasi-particle (QP) anomaly in LiFeAs. Lastly, the excellent agreement between our photoemission measurements and first-principles many-body theory calculations shows that the orbital-differentiated QP lifetime anomalies in LiFeAs are controlled by the Hund's coupling.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Brookhaven National Laboratory (BNL), Upton, NY (United States)

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

Grant/Contract Number:: SC0012704; AC05-00OR22725

OSTI ID:: 1342635

Alternate ID(s):: OSTI ID: 1332034

Report Number(s):: BNL-113429-2017-JA; PRBMDO; R&D Project: PO011; KC0201060; TRN: US1701255

Journal Information:: Physical Review B, Vol. 94, Issue 20; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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Orbital-selective bad metals due to Hund's rule and orbital anisotropy: A finite-temperature slave-spin treatment of the two-band Hubbard model Mezio, Alejandro; McKenzie, Ross H. Physical Review B, Vol. 100, Issue 20 https://doi.org/10.1103/physrevb.100.205134	journal	November 2019
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