Direct characterization of photoinduced lattice dynamics in BaFe2As2

S. Gerber; K. W. Kim; Y. Zhang; D. Zhu; N. Plonka; M. Yi; G. L. Dakovski; D. Leuenberger; P. S. Kirchmann; R. G. Moore; M. Chollet; J. M. Glownia; Y. Feng; J. S. Lee; A. Mehta; A. F. Kemper; T. Wolf; Y. D. Chuang; Z. Hussain; C. C. Kao; B. Moritz; Z. X. Shen; T. P. Devereaux; W. S. Lee

doi:10.1038/ncomms8377

Direct characterization of photoinduced lattice dynamics in BaFe₂As₂

S. Gerber, K. W. Kim, Y. Zhang, D. Zhu, N. Plonka, M. Yi, G. L. Dakovski, D. Leuenberger, P. S. Kirchmann, R. G. Moore, M. Chollet, J. M. Glownia, Y. Feng, J. S. Lee, A. Mehta, A. F. Kemper, T. Wolf, Y. D. Chuang, Z. Hussain, C. C. KaoB. Moritz, Z. X. Shen, T. P. Devereaux, W. S. Lee

Research output: Contribution to journal › Article › peer-review

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Abstract

Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics of photoexcited BaFe₂As₂. On optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A_1g mode that modulates the Fe-As-Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photoinduced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands.

Original language	English
Article number	7377
Journal	Nature Communications
Volume	6
DOIs	https://doi.org/10.1038/ncomms8377
State	Published - Jun 8 2015
Externally published	Yes

Funding

This work was carried out at the X-ray Pump–Probe (XPP) instrument of the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory. LCLS is an Office of Science User Facility operated for the U.S. Department of Energy, Office of Science by Stanford University. The authors gratefully acknowledge assistance and discussions with J. J. Turner, I. R. Fisher, J.-H. Chu and H.-H. Kuo. The research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under contract No. DE-AC02-76SF00515. S.G. and D.L. acknowledge support by the Swiss National Science Foundation under Fellowships No. P2EZP2_148737 and P300P2_151328, respectively. K.W.K. was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (MSIP) (2014R1A1A1007531), the World Class Institute (WCI) Program of NRF funded by MSIP (NRF grant No.: WCI 2011-001), and PAL, Korea.

Funders	Funder number
Office of Basic Energy Sciences
PAL
U.S. Department of Energy
Division of Materials Sciences and Engineering	DE-AC02-76SF00515
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	P2EZP2_148737, P300P2_151328
Ministry of Science, ICT and Future Planning	WCI 2011-001, 2014R1A1A1007531
National Research Foundation of Korea

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Gerber, S., Kim, K. W., Zhang, Y., Zhu, D., Plonka, N., Yi, M., Dakovski, G. L., Leuenberger, D., Kirchmann, P. S., Moore, R. G., Chollet, M., Glownia, J. M., Feng, Y., Lee, J. S., Mehta, A., Kemper, A. F., Wolf, T., Chuang, Y. D., Hussain, Z., ... Lee, W. S. (2015). Direct characterization of photoinduced lattice dynamics in BaFe₂As₂. Nature Communications, 6, Article 7377. https://doi.org/10.1038/ncomms8377

@article{eb46882627b5418ba3e143af54f05e42,

title = "Direct characterization of photoinduced lattice dynamics in BaFe2As2",

abstract = "Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics of photoexcited BaFe2As2. On optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A1g mode that modulates the Fe-As-Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photoinduced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands.",

author = "S. Gerber and Kim, {K. W.} and Y. Zhang and D. Zhu and N. Plonka and M. Yi and Dakovski, {G. L.} and D. Leuenberger and Kirchmann, {P. S.} and Moore, {R. G.} and M. Chollet and Glownia, {J. M.} and Y. Feng and Lee, {J. S.} and A. Mehta and Kemper, {A. F.} and T. Wolf and Chuang, {Y. D.} and Z. Hussain and Kao, {C. C.} and B. Moritz and Shen, {Z. X.} and Devereaux, {T. P.} and Lee, {W. S.}",

year = "2015",

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Gerber, S, Kim, KW, Zhang, Y, Zhu, D, Plonka, N, Yi, M, Dakovski, GL, Leuenberger, D, Kirchmann, PS, Moore, RG, Chollet, M, Glownia, JM, Feng, Y, Lee, JS, Mehta, A, Kemper, AF, Wolf, T, Chuang, YD, Hussain, Z, Kao, CC, Moritz, B, Shen, ZX, Devereaux, TP & Lee, WS 2015, 'Direct characterization of photoinduced lattice dynamics in BaFe₂As₂', Nature Communications, vol. 6, 7377. https://doi.org/10.1038/ncomms8377

TY - JOUR

T1 - Direct characterization of photoinduced lattice dynamics in BaFe2As2

AU - Gerber, S.

AU - Kim, K. W.

AU - Zhang, Y.

AU - Zhu, D.

AU - Plonka, N.

AU - Yi, M.

AU - Dakovski, G. L.

AU - Leuenberger, D.

AU - Kirchmann, P. S.

AU - Moore, R. G.

AU - Chollet, M.

AU - Glownia, J. M.

AU - Feng, Y.

AU - Lee, J. S.

AU - Mehta, A.

AU - Kemper, A. F.

AU - Wolf, T.

AU - Chuang, Y. D.

AU - Hussain, Z.

AU - Kao, C. C.

AU - Moritz, B.

AU - Shen, Z. X.

AU - Devereaux, T. P.

AU - Lee, W. S.

PY - 2015/6/8

Y1 - 2015/6/8

N2 - Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics of photoexcited BaFe2As2. On optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A1g mode that modulates the Fe-As-Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photoinduced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands.

AB - Ultrafast light pulses can modify electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved X-ray scattering to measure the lattice dynamics of photoexcited BaFe2As2. On optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A1g mode that modulates the Fe-As-Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photoinduced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands.

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SN - 2041-1723

VL - 6

JO - Nature Communications

JF - Nature Communications

M1 - 7377

ER -

Direct characterization of photoinduced lattice dynamics in BaFe₂As₂

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