Real-Space Description of Dynamics of Liquids

Egami, Takeshi

doi:10.3390/qubs2040022

Title: Real-Space Description of Dynamics of Liquids

Abstract

In strongly disordered matter, such as liquids and glasses, atomic and magnetic excitations are heavily damped and partially localized by disorder. Thus, the conventional descriptions in terms of phonons and magnons are inadequate, and we have to consider spatially correlated atomic and spin dynamics in real-space and time. Experimentally this means that the usual representation of dynamics in terms of the dynamic structure factor, S(Q, E), where Q and E are the momentum and energy exchanges in scattering, is insufficient. Here, we propose a real-space description in terms of the dynamic pair-density function (DyPDF) and the Van Hove function (VHF) as an alternative, and discuss recent results on superfluid ⁴He by inelastic neutron scattering and water by inelastic X-ray scattering. Today much of the objects of research in condensed-matter physics and materials science are highly complex materials. To characterize the dynamics of such complex materials, the real-space approach is likely to become the mainstream method of research.

Authors:

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull-Wollan Center, Joint-Inst. for Neutron Sciences; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

Publication Date:: Sun Oct 28 00:00:00 EDT 2018

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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

OSTI Identifier:: 1482439

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Quantum Beam Science

Additional Journal Information:: Journal Volume: 2; Journal Issue: 4; Journal ID: ISSN 2412-382X

Country of Publication:: United States

Language:: English

Subject:: liquids; inelastic scattering; real-space dynamics; Van Hove function

Citation Formats


                    Egami, Takeshi. Real-Space Description of Dynamics of Liquids.  United States: N. p., 2018. 
Web.  doi:10.3390/qubs2040022.

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                    Egami, Takeshi. Real-Space Description of Dynamics of Liquids.  United States.  https://doi.org/10.3390/qubs2040022

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                    Egami, Takeshi. Sun .  
"Real-Space Description of Dynamics of Liquids".  United States.  https://doi.org/10.3390/qubs2040022.  https://www.osti.gov/servlets/purl/1482439.

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@article{osti_1482439,

  title        = {Real-Space Description of Dynamics of Liquids},

  author       = {Egami, Takeshi},

  abstractNote = {In strongly disordered matter, such as liquids and glasses, atomic and magnetic excitations are heavily damped and partially localized by disorder. Thus, the conventional descriptions in terms of phonons and magnons are inadequate, and we have to consider spatially correlated atomic and spin dynamics in real-space and time. Experimentally this means that the usual representation of dynamics in terms of the dynamic structure factor, S(Q, E), where Q and E are the momentum and energy exchanges in scattering, is insufficient. Here, we propose a real-space description in terms of the dynamic pair-density function (DyPDF) and the Van Hove function (VHF) as an alternative, and discuss recent results on superfluid 4He by inelastic neutron scattering and water by inelastic X-ray scattering. Today much of the objects of research in condensed-matter physics and materials science are highly complex materials. To characterize the dynamics of such complex materials, the real-space approach is likely to become the mainstream method of research.},

  doi          = {10.3390/qubs2040022},

  journal      = {Quantum Beam Science},

  number       = 4,

  volume       = 2,

  place        = {United States},

  year         = {Sun Oct 28 00:00:00 EDT 2018},

  month        = {Sun Oct 28 00:00:00 EDT 2018}

}

Copy to clipboard

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Similar Records

Title: Real-Space Description of Dynamics of Liquids

Abstract

Citation Formats

Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids journal, January 2000

The λ-Phenomenon of Liquid Helium and the Bose-Einstein Degeneracy journal, April 1938

A Geometrical Approach to the Structure Of Liquids journal, January 1959

Inelastic X-ray scattering and the high-frequency dynamics of disordered systems journal, June 2002

Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments journal, November 2014

Neutron Spin Echo Study of Dynamic Correlations Near Liquid-Glass Transition journal, January 1987

The Spallation Neutron Source in Oak Ridge: A powerful tool for materials research journal, November 2006

The origin of viscosity as seen through atomic level stress correlation function journal, January 2013

A dynamic correlation function for amorphous solids journal, November 1992

Neutron-diffraction study of the static structure factor and pair correlations in liquid He 4 journal, April 1980

Condensate, momentum distribution, and final-state effects in liquid 4 He journal, December 2000

Coherent neutron scattering and collective dynamics on mesoscale journal, April 2013

Van Hove correlation functions from coherent neutron inelastic scattering journal, September 1989

Stringlike Cooperative Motion in a Supercooled Liquid journal, March 1998

Local structural fluctuations in amorphous and liquid metals: a simple theory of the glass transition journal, October 1982

Stabilization of Polar Nanoregions in Pb-free Ferroelectrics journal, May 2018

Anomaly of structural relaxation in complex liquid metal of bismuth - Dynamic correlation function of coherent quasi-elastic neutron scattering journal, December 2018

Observation of dynamic atom-atom correlation in liquid helium in real space journal, May 2017

Hydration Dynamics at Femtosecond Time Scales and Angstrom Length Scales from Inelastic X-Ray Scattering journal, December 2009

Dynamic correlation function studies of the medium-range order in materials journal, December 1995

Viscosity of Liquid Helium below the λ-Point journal, January 1938

Inelastic neutron scattering from amorphous solids. II. Interpretation of measurements journal, September 1975

Revealing the fast atomic motion of network glasses journal, May 2014

Dynamic structure factor of liquid He 4 across the normal-superfluid transition journal, March 2016

Atomic Theory of Liquid Helium Near Absolute Zero journal, September 1953

Structural defects in amorphous solids A computer simulation study journal, June 1980

Theory of the Superfluidity of Helium II journal, August 1941

Seeing real-space dynamics of liquid water through inelastic x-ray scattering journal, December 2017

Structural relaxation, viscosity, and network connectivity in a hydrogen bonding liquid journal, January 2017

High-intensity double-pulse X-ray free-electron laser journal, March 2015

Imaging Density Disturbances in Water with a 41.3-Attosecond Time Resolution journal, June 2004

Intermediate length scale dynamics in glass forming polymers: coherent and incoherent quasielastic neutron scattering results on polyisobutylene journal, August 2003

A time-of-flight backscattering spectrometer at the Spallation Neutron Source, BASIS journal, August 2011

Predicting the Long-Time Dynamic Heterogeneity in a Supercooled Liquid on the Basis of Short-Time Heterogeneities journal, May 2006

Local structural fluctuations in amorphous and liquid metals: a simple theory of the glass transition journal, April 1983

Dynamic structure factor of liquid 4He across the normal-superfluid transition text, January 2016

Stabilization of Polar Nano Regions in Pb-free ferroelectrics text, January 2017

Imaging density disturbances in water with 41.3 attosecond time resolution text, January 2003

Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids
journal, January 2000

The λ-Phenomenon of Liquid Helium and the Bose-Einstein Degeneracy
journal, April 1938

A Geometrical Approach to the Structure Of Liquids
journal, January 1959

Inelastic X-ray scattering and the high-frequency dynamics of disordered systems
journal, June 2002

Mantid—Data analysis and visualization package for neutron scattering and $μ$ SR experiments
journal, November 2014

Neutron Spin Echo Study of Dynamic Correlations Near Liquid-Glass Transition
journal, January 1987

The Spallation Neutron Source in Oak Ridge: A powerful tool for materials research
journal, November 2006

The origin of viscosity as seen through atomic level stress correlation function
journal, January 2013

A dynamic correlation function for amorphous solids
journal, November 1992

Neutron-diffraction study of the static structure factor and pair correlations in liquid ${}^{4}{He}$
journal, April 1980

Condensate, momentum distribution, and final-state effects in liquid $^{4} He$
journal, December 2000

Coherent neutron scattering and collective dynamics on mesoscale
journal, April 2013

Van Hove correlation functions from coherent neutron inelastic scattering
journal, September 1989

Stringlike Cooperative Motion in a Supercooled Liquid
journal, March 1998

Local structural fluctuations in amorphous and liquid metals: a simple theory of the glass transition
journal, October 1982

Stabilization of Polar Nanoregions in Pb-free Ferroelectrics
journal, May 2018

Anomaly of structural relaxation in complex liquid metal of bismuth - Dynamic correlation function of coherent quasi-elastic neutron scattering
journal, December 2018

Observation of dynamic atom-atom correlation in liquid helium in real space
journal, May 2017

Hydration Dynamics at Femtosecond Time Scales and Angstrom Length Scales from Inelastic X-Ray Scattering
journal, December 2009

Dynamic correlation function studies of the medium-range order in materials
journal, December 1995

Viscosity of Liquid Helium below the λ-Point
journal, January 1938

Inelastic neutron scattering from amorphous solids. II. Interpretation of measurements
journal, September 1975

Revealing the fast atomic motion of network glasses
journal, May 2014

Dynamic structure factor of liquid ${}^{4}{He}$ across the normal-superfluid transition
journal, March 2016

Atomic Theory of Liquid Helium Near Absolute Zero
journal, September 1953

Structural defects in amorphous solids A computer simulation study
journal, June 1980

Theory of the Superfluidity of Helium II
journal, August 1941

Seeing real-space dynamics of liquid water through inelastic x-ray scattering
journal, December 2017

Structural relaxation, viscosity, and network connectivity in a hydrogen bonding liquid
journal, January 2017

High-intensity double-pulse X-ray free-electron laser
journal, March 2015

Imaging Density Disturbances in Water with a 41.3-Attosecond Time Resolution
journal, June 2004

Intermediate length scale dynamics in glass forming polymers: coherent and incoherent quasielastic neutron scattering results on polyisobutylene
journal, August 2003

A time-of-flight backscattering spectrometer at the Spallation Neutron Source, BASIS
journal, August 2011

Predicting the Long-Time Dynamic Heterogeneity in a Supercooled Liquid on the Basis of Short-Time Heterogeneities
journal, May 2006

Local structural fluctuations in amorphous and liquid metals: a simple theory of the glass transition
journal, April 1983

Dynamic structure factor of liquid 4He across the normal-superfluid transition
text, January 2016

Stabilization of Polar Nano Regions in Pb-free ferroelectrics
text, January 2017

Imaging density disturbances in water with 41.3 attosecond time resolution
text, January 2003