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Femtosecond optical and x-ray studies on ultrafast dynamics in manganites associated with phase transitions

English title Femtosecond optical and x-ray studies on ultrafast dynamics in manganites associated with phase transitions
Applicant Beaud Paul
Number 124496
Funding scheme Project funding
Research institution Allgemeine Energieforschung Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.04.2010 - 31.03.2013
Approved amount 157'983.00
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Keywords (5)

Ultrafast dynamics of phase transitions; Femtosecond x-ray diffraction; Ultrafast phenomena in solid matter; manganites; ultrafast phenomena

Lay Summary (English)

Lead
Lay summary
In the past two decades modern solid state research has discovered many new materials with exotic but highly technologically relevant properties such as high-temperature superconductivity, colossal magnetoresistance, and multiferroicity. A common feature of these materials, often referred to as "strongly correlated electron systems," is a complex phase diagram arising from strong interactions among local charges, orbitals, spins, and distortions of the atomic lattice. Since standard perturbation theory usually fails to describe these effects even qualitatively, understanding these correlations poses a great challenge for modern physics. One approach to understanding the complex interactions between different degrees of freedom in strongly correlated systems is to use time-resolved methods to study the response of a material after it has been driven out of equilibrium on a time scale shorter or comparable to the period of the fastest atomic vibrations of 10 - 1000 femtoseconds (1 fs = 0.000000000000001 s). Our proposed studies will focus on several related perovskite manganite compounds. We will study the proposed manganites over a wide parameter range with ultrafast optical methods and will study selected samples with femtosecond x-ray diffraction. Time-resolved X-ray measurements can offer new physical insights into these strong correlations by separating correlated effects in the time domain, giving direct access to the dynamic atomic and electronic long range structure. In addition our research offers the opportunity to develop experimental techniques that have important future ap-plication to other areas of fundamental research. In view of the emerging XFEL facilities (XFEL = x-ray free electron laser), which soon will deliver x-ray beams of high brilliance and ultrashort duration, it is vitally important to the scientific community to refine and develop experimental methods to tackle new emerging scientific problems on ultrashort time scales.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
A time-dependent order parameter for ultrafast photoinduced phase transitions
P. Beaud, A. Caviezel, et al. (2014), A time-dependent order parameter for ultrafast photoinduced phase transitions, in Nature Materials, nmat4046.
Direct observation of non-fully-symmetric coherent optical phonons by femtosecond x-ray diffraction
Johnson S. L., Beaud P., Moehr-Vorobeva E., Caviezel A., Ingold G., Milne C. J. (2013), Direct observation of non-fully-symmetric coherent optical phonons by femtosecond x-ray diffraction, in PHYSICAL REVIEW B, 87(5), 054301-1-054301-8.
Identification of coherent lattice modulations coupled to charge and orbital order in a manganite
Caviezel A., Mariager S. O., Johnson S. L., Moehr-Vorobeva E., Huang S. W., Ingold G., Staub U., Milne C. J., Cheong S. -W., Beaud P. (2013), Identification of coherent lattice modulations coupled to charge and orbital order in a manganite, in PHYSICAL REVIEW B, 87(20), 205104-1-205104-6.
Optical and x-ray time resolved study of the structural transition in mixed valence manganites
Caviezel A., Staub U., Johnson S. L., Mariager S. O., Ingold G., Moehr-Vorobeva E., Garganourakis M., Huang S.-W., Milne C. J., Jia Q. X., Chepng S.-W., Beaud P. (2013), Optical and x-ray time resolved study of the structural transition in mixed valence manganites, in XVIIIth International Conference on Ultrafast Phenomena, Lausanne.
Coherent phonon dynamics at the martensitic phase transition of Ni2MnGa
Mariager S. O., Caviezel A., Beaud P., Quitmann C., Ingold G. (2012), Coherent phonon dynamics at the martensitic phase transition of Ni2MnGa, in APPLIED PHYSICS LETTERS, 100(26), 261911-1-261911-4.
Femtosecond Dynamics of the Collinear-to-Spiral Antiferromagnetic Phase Transition in CuO
Johnson SL, de Souza RA, Staub U, Beaud P, Mohr-Vorobeva E, Ingold G, Caviezel A, Scagnoli V, Schlotter WF, Turner JJ, Krupin O, Lee WS, Chuang YD, Patthey L, Moore RG, Lu D, Yi M, Kirchmann PS, Trigo M, Denes P, Doering D, Hussain Z, Shen ZX, Prabhakaran D, Boothroyd AT (2012), Femtosecond Dynamics of the Collinear-to-Spiral Antiferromagnetic Phase Transition in CuO, in PHYSICAL REVIEW LETTERS, 108(3), 037203-1-037203-5.
Femtosecond dynamics of the structural transition in mixed valence manganites
Caviezel A., Staub U., Johnson S. L., Mariager S. O., Moehr-Vorobeva E., Ingold G., Milne C. J., Garganourakis M., Scagnoli V., Huang S. W., Jia Q. X., Cheong S. -W., Beaud P. (2012), Femtosecond dynamics of the structural transition in mixed valence manganites, in PHYSICAL REVIEW B, 86(17), 174105-1-174105-8.
Structural and Magnetic Dynamics of a Laser Induced Phase Transition in FeRh
Mariager SO, Pressacco F, Ingold G, Caviezel A, Mohr-Vorobeva E, Beaud P, Johnson SL, Milne CJ, Mancini E, Moyerman S, Fullerton EE, Feidenhans'l R, Back CH, Quitmann C (2012), Structural and Magnetic Dynamics of a Laser Induced Phase Transition in FeRh, in PHYSICAL REVIEW LETTERS, 108(8), 087201-1-087201-5.
Ultrafast Structural Dynamics in Condensed Matter
Beaud P, Johnson SL, Vorobeva E, Milne CJ, Caviezel A, Mariager SO, De Souza RA, Staub U, Ingold G (2011), Ultrafast Structural Dynamics in Condensed Matter, in CHIMIA, 65(5), 308-312.

Collaboration

Group / person Country
Types of collaboration
University of Fribourg Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Los Alamos National Laboratory United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
ETH Zuerich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Rutgers University, New Jersey United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
SLAC National Accelerator Laboratory, Stanford United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
University of Konstanz Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
New Trends and Faces in Ultrafast Structural Dynamics Talk given at a conference Femtosecond nonresonant and resonant x-ray diffracton 15.10.2013 Stellenbosch, South Africa Caviezel Andrin; Beaud Paul;
New Trends and Faces in Ultrafast Structural Dynamics Talk given at a conference Ultrafast X-ray diffraction on mixed valence manganites 15.10.2013 Stellenbosch, South Africa Beaud Paul; Caviezel Andrin;
Joint User's meeting at PSI Talk given at a conference Ultrafast studies of laser induced dynamics in charge and orbitally ordered manganites 20.09.2013 Villigen, Switzerland Caviezel Andrin;
Science at FEMTO-SLICING facilities Talk given at a conference Ultrafast structural dynamics in solid matter - grazing incidence diffraction 27.05.2013 Saint Aubin, France, France Beaud Paul;
3rd Banff Meeting on Structural Dynamics Talk given at a conference Atomic motion associated with the coherent optical phonon in charge and orbitallky ordered manganites 17.02.2013 Banff, Canada, Canada Caviezel Andrin;
XVIIIth International Conference on Ultrafast Phenomena Poster Optical and x-ray time resolved study of the structural transition in mixed valence manganites 08.07.2012 Lausanne, Switzerland, Switzerland Caviezel Andrin;
SPS Annual Meeting 2012 Talk given at a conference Atomic motion of a coherent phonon observed in a charge and orbitally ordered manganite 21.06.2012 Zuerich, Switzerland, Switzerland Caviezel Andrin;
Joint Annual Meeting of the Swiss Physical Society and Austrian Physical Society with Swiss and Austrian Societies for Astronomy and Astrophysics Talk given at a conference Atomikc motion of a coherent phonon observed in a charge and orbitally ordered manganite 20.06.2012 ETH zueirech, Switzerland Caviezel Andrin;
International Conference on Ultrafast Structural Dynamics (ICUSD) Talk given at a conference Ultrafast structural dynamics in manganites associated with phase transitions 19.03.2012 Berlin, Germany Beaud Paul;
SwissFEL Hard X-ray Instrumentation Workshops Poster Ultrafast Strucural Dynamics in strongly correlated electron systems> timing specifications 21.11.2011 Bern, Switzerland, Switzerland Beaud Paul; Caviezel Andrin; Johnson Steven; Ingold Gerhard; Staub Urs;
Joint Annual Meeting of the Swiss Physical Society and Austrian Physical Society with Swiss and Austrian Societies for Astronomy and Astrophysics Talk given at a conference Photoinduced non-thermal phase transition in manganites 15.06.2011 Lausanne, Switzerland Caviezel Andrin;
International Conference on Ultrafast Structural Dynamics (ICUSD) Poster Photoinduced melting of charge and orbitally order in La0.42Ca0.58MnO3 07.06.2011 Lausanne, Switzerland, Switzerland Beaud Paul;


Self-organised

Title Date Place
Workshop on Ultrafast Dynamics in Strongly Correlated Systems 04.04.2011 ETH Hoenggerberg, Zuerich, Switzerland

Associated projects

Number Title Start Funding scheme
128750 Proposal for FEMTO Diffraction Endstation at SLS for Femtosecond Laser-X-Ray Pump-Probe Experiments at low Temperatures 01.12.2010 R'EQUIP
109165 Electronic and Magnetic Ordering Phenomena at metal-insulator transitions 01.01.2006 Project funding

Abstract

The proposed research will advance our current understanding of the interplay of the electronic system with the lattice in strongly correlated electron systems. In many such solids there are strong coupling mechanisms between the electronic and lattice energy subsystems, often resulting in a subtle balance between opposing forces. Femtosecond x-ray diffraction is a unique tool that provides unambiguous, quantitative structural information on time scales relevant for the lattice dynamics of these systems. Our proposed studies will focus on several related manganite compounds. We intend to measure in the same systems both the structural dynamics using femtosecond x-ray diffraction and the static electronic ordering using resonant diffraction. The ultimate goal of our studies at the SLS is to combine these efforts towards a time-resolved resonant x-ray diffraction experiment at the FLASH soft x-ray FEL and at future hard x-ray FELs to reveal correlated structural and electronic dynamics as they develop. In the present proposal we ask for funding of a PhD student. He or she will study the proposed manganites over a wide parameter range with ultrafast optical methods and will study selected samples together with the FEMTO team with femtosecond x-ray diffraction. The FEMTO-project at the Swiss Light Source (SLS) is currently the only operational tunable source delivering femtosecond hard x-rays tunable in the energy range from 5 to 12 keV with a well-collimated beam. The proposed diffraction experiments in the hard x-ray range cannot be performed today at any other facility worldwide.
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