Phonon anomalies and magnetic excitations in BaFe2Se2O

Jin, Feng; Lazarević, Nenad; Liu, Changle; Ji, Jianting; Wang, Yimeng; He, Shuna; Lei, Hechang; Petrovic, Cedomir; Yu, Rong; Popović, Zoran V.; Zhang, Qingming

doi:10.1103/PhysRevB.99.144419

Title: Phonon anomalies and magnetic excitations in ${BaFe}_{2} {Se}_{2} O$

Abstract

We report a temperature- and magnetic-field-dependent Raman-scattering study of the spin-ladder compound BaFe₂Se₂O. Temperature evolution of the B_1g mode self-energies revealed anomalous behavior at about 100 and 240 K with strong temperature-dependent Fano asymmetry. Furthermore, the A_g modes integrated intensity exhibits an additional change in tendency at about 50 K. All the observed anomalies can be traced back to spin-phonon interaction contributions as well as multiple magnetic phase transitions present in BaFe₂Se₂O also detected in the Raman continuum induced by the spin fluctuations. Moreover, the absence of magnetic-field dependence of the magnetic mode observed at 436cm^–1 and the small linewidth and high intensity are different from the magnetic modes at about 650cm^–1. In conclusion, this suggests a two-magnon continuum and a two-magnon bound state resonance for this mode.

Authors:

Jin, Feng ^[1]; Lazarević, Nenad ^[2]; Liu, Changle ^[3]; Ji, Jianting ^[4]; Wang, Yimeng ^[1]; He, Shuna ^[1]; Lei, Hechang ^[1];

^[5]; Yu, Rong ^[1]; Popović, Zoran V. ^[6]; Zhang, Qingming ^[7]

Renmin Univ. of China, Beijing (China)
Univ. of Belgrade, Belgrade (Serbia)
Fudan Univ., Shanghai (China)
Chinese Academy of Sciences, Beijing (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. of Belgrade, Belgrade (Serbia); Serbian Academy of Sciences and Arts, Belgrade (Serbia)
Chinese Academy of Sciences, Beijing (China); Lanzhou Univ., Lanzhou (China)

Publication Date:: Mon Apr 22 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

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

OSTI Identifier:: 1515156

Alternate Identifier(s):: OSTI ID: 1508187

Report Number(s):: BNL-211692-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 99; 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


                    Jin, Feng, Lazarević, Nenad, Liu, Changle, Ji, Jianting, Wang, Yimeng, He, Shuna, Lei, Hechang, Petrovic, Cedomir, Yu, Rong, Popović, Zoran V., and Zhang, Qingming. Phonon anomalies and magnetic excitations in BaFe2Se2O.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevB.99.144419.

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                    Jin, Feng, Lazarević, Nenad, Liu, Changle, Ji, Jianting, Wang, Yimeng, He, Shuna, Lei, Hechang, Petrovic, Cedomir, Yu, Rong, Popović, Zoran V., & Zhang, Qingming. Phonon anomalies and magnetic excitations in BaFe2Se2O.  United States.  https://doi.org/10.1103/PhysRevB.99.144419

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                    Jin, Feng, Lazarević, Nenad, Liu, Changle, Ji, Jianting, Wang, Yimeng, He, Shuna, Lei, Hechang, Petrovic, Cedomir, Yu, Rong, Popović, Zoran V., and Zhang, Qingming. Mon .  
"Phonon anomalies and magnetic excitations in BaFe2Se2O".  United States.  https://doi.org/10.1103/PhysRevB.99.144419.  https://www.osti.gov/servlets/purl/1515156.

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@article{osti_1515156,

  title        = {Phonon anomalies and magnetic excitations in BaFe2Se2O},

  author       = {Jin, Feng and Lazarević, Nenad and Liu, Changle and Ji, Jianting and Wang, Yimeng and He, Shuna and Lei, Hechang and Petrovic, Cedomir and Yu, Rong and Popović, Zoran V. and Zhang, Qingming},

  abstractNote = {We report a temperature- and magnetic-field-dependent Raman-scattering study of the spin-ladder compound BaFe2Se2O. Temperature evolution of the B1g mode self-energies revealed anomalous behavior at about 100 and 240 K with strong temperature-dependent Fano asymmetry. Furthermore, the Ag modes integrated intensity exhibits an additional change in tendency at about 50 K. All the observed anomalies can be traced back to spin-phonon interaction contributions as well as multiple magnetic phase transitions present in BaFe2Se2O also detected in the Raman continuum induced by the spin fluctuations. Moreover, the absence of magnetic-field dependence of the magnetic mode observed at 436cm–1 and the small linewidth and high intensity are different from the magnetic modes at about 650cm–1. In conclusion, this suggests a two-magnon continuum and a two-magnon bound state resonance for this mode.},

  doi          = {10.1103/PhysRevB.99.144419},

  journal      = {Physical Review B},

  number       = 14,

  volume       = 99,

  place        = {United States},

  year         = {Mon Apr 22 00:00:00 EDT 2019},

  month        = {Mon Apr 22 00:00:00 EDT 2019}

}

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Title: Phonon anomalies and magnetic excitations in BaFe 2 Se 2 O

Abstract

Citation Formats

The Resonating Valence Bond State in La2CuO4 and Superconductivity journal, March 1987

Surprises on the Way from One- to Two-Dimensional Quantum Magnets: The Ladder Materials journal, February 1996

Experiments on ladders reveal a complex interplay between a spin-gapped normal state and superconductivity journal, November 1999

Magnetic light scattering in low-dimensional quantum spin systems journal, February 2003

Excitation spectrum of Heisenberg spin ladders journal, February 1993

Susceptibility and excitation spectrum of (VO ) 2 P 2 O 7 in ladder and dimer-chain models journal, September 1994

Resonating Valence Bond Theory of Coupled Heisenberg Chains journal, August 1994

Spin ladders with spin gaps: A description of a class of cuprates journal, April 1994

Antiferromagnetic spin ladders: Crossover between spin S =1/2 and S =1 chains journal, April 1996

Raman scattering from magnetic excitations in the spin-ladder compounds CaV 2 O 5 and MgV 2 O 5 journal, June 2000

Optical properties of the spin-ladder compound Sr 14 Cu 24 O 41 journal, August 2000

Spin Dynamics of Sr 14 Cu 24 O 41 Two-Leg Ladder Studied by Raman Spectroscopy journal, October 2001

Charge-Order-Induced Sharp Raman Peak in S r 14 C u 24 O 41 journal, April 2003

Magnetic excitations in SrCu 2 O 3 : A Raman scattering study journal, February 2003

Magnetic Raman Scattering in Two-Leg Spin Ladder Sr14?x?yCaxYyCu24O41 journal, September 1999

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BaFe 2 Se 2 O as an iron-based Mott insulator with antiferromagnetic order journal, July 2012

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Phonon and magnetic dimer excitations in Fe-based S = 2 spin-ladder compound BaFe 2 Se 2 O journal, January 2014

Phonon anomalies in FeS journal, February 2018

Evidence of spin-phonon coupling in CrSiTe 3 journal, September 2018

Effects of Configuration Interaction on Intensities and Phase Shifts journal, December 1961

Spin-Phonon Coupling in CuGeO 3 journal, April 1998

Strong anharmonicity and spin-phonon coupling in the quasi-two-dimensional quantum spin system Sr 1 − x Ba x Cu 2 ( BO 3 ) 2 journal, September 2003

Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets CdCr 2 O 4 and ZnCr 2 O 4 journal, December 2009

Temperature dependence of the first-order Raman scattering by phonons in Si, Ge, and α − S n : Anharmonic effects journal, February 1984

Influence of Magnetic Order on Conduction Electrons and Phonons in Magnetic Semiconductors journal, March 1970

Microscopic spin-phonon coupling constants in CuGeO 3 journal, June 1999

Light-scattering study of dynamical behavior of antiferromagnetic spins in the layered magnetic semiconductor FePS 3 journal, November 1990

Collective Singlet Excitations and Evolution of Raman Spectral Weights in the 2D Spin Dimer Compound SrCu 2 ( BO 3 ) 2 journal, September 2000

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Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators journal, May 1996

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Title: Phonon anomalies and magnetic excitations in ${BaFe}_{2} {Se}_{2} O$

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Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets ${CdCr}_{2} O_{4}$ and ${ZnCr}_{2} O_{4}$
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Temperature dependence of the first-order Raman scattering by phonons in Si, Ge, and $α - S n$ : Anharmonic effects
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Influence of Magnetic Order on Conduction Electrons and Phonons in Magnetic Semiconductors
journal, March 1970

Microscopic spin-phonon coupling constants in ${CuGeO}_{3}$
journal, June 1999

Light-scattering study of dynamical behavior of antiferromagnetic spins in the layered magnetic semiconductor ${FePS}_{3}$
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Collective Singlet Excitations and Evolution of Raman Spectral Weights in the 2D Spin Dimer Compound ${SrCu}_{2} ({BO}_{3})_{2}$
journal, September 2000

Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder System ${BiCu}_{2} {PO}_{6}$
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journal, September 2005

Raman cross section of spin ladders
journal, June 2001

Bound States of Magnons in the $S = 1 / 2$ Quantum Spin Ladder
journal, August 1998

Elementary excitations in dimerized and frustrated Heisenberg chains
journal, August 1998

Observation of Two-Magnon Bound States in the Two-Leg Ladders of $(C a, L a)_{14} {Cu}_{24} O_{41}$
journal, August 2001

Fractional and Integer Excitations in Quantum Antiferromagnetic Spin $1 / 2$ Ladders
journal, October 2001