Organization

Management Structure

Integration and coordination within the Center will be approached from two perspectives – one driven by the research goals and the other driven by the thrust areas. The Office of the Director will ensure integration between activities and tasks that tie to the Center’s research goals. To visualize how our carefully organized and appropriately focused research plan drives integration, it is helpful to consider a high-level overview of the tasks associated with each research goal shown in the Figure below. 

The Temperature Extremes Goal and the Electron-Phonon Coupling Goal represent the forefront of thermal transport research. To make these tractable problems we limit our focus to defect free single crystals. Understanding these fundamental mechanisms is a required step towards accurately treating thermal transport under irradiation (the subject of our remaining research goals). 

The Impact of Defects on Thermal Transport Goal has an oxide and a nitride focus. For the oxide portion, we take a thorough approach by considering a broad spectrum of defects from point defects to large clusters. For the nitride portion, our focus is limited primarily to point defects. We take a similar approach with the Impact of Interfaces on Thermal Transport Goal, by considering defect clustering for oxide interfaces and limiting our focus for nitride interfaces. Meeting these goals will require close interaction and coordination between the computational and the experimental research teams. 

The research conducted within the Center represents coordinated achievements involving either input/output interconnections or critical prediction/validation interactions that has and will continue to result in impactful publications and review articles.

No irradiation induced effects​

Temperature Extremes
  • Measuring phonons at temperature extremes
  • Measuring properties at high temps, under pressure
  • Comparing with first-principles prediction
  • Gauging impact of electron correlation
Oxides
Electron-Phonon Coupling
  • Measuring electron and phonon structure
  • Measuring electron and phonon thermal conductivity
  • Comparing with first-principle prediction
  • Gauging impact of electron correlation
Nitrides

Irradiation induced effects

Impact of Defects on Thermal Transport
  • Measurement orthongonality for point defects
  • Nature and distribution of dislocation loops
  • Critical insight using evolution models
  • Impact of defects on thermal conductivity
Oxides
  • Measure orthongonality for point defects
  • Impact of irradiation defects on thermal transport
  • Thermal conductivity (electrons and phonons)
Nitrides
Impact of Interfaces on Thermal Transport
  • Impact of grain boundaries on defect evolution
  • Grain boundary conductance
    • Localized modes
    • Comparing measurements with prediction
Oxides
  • Impact of hetero-interfaces on defect evolution
  • Interface conductance
    • Role of electrons and phonons
Nitrides

Institutional Contribution

Last NameFirst NameInstitutionRoleResponsibilities and Technical Scope
HurleyDavidINLDirector, Executive CommitteeOverall management and direction of TETI. Sets strategy and priorities.
KhafizovMaratOSUDeputy Director, Oxide Thrust Lead, Executive CommitteeExperiment coordinator, spectrum of defects challenge.
MarianettiChrisColumbiaNitride Thrust Lead, Executive CommitteeElectron-phonon coupling, challenge, modeling coordinator.
JinMiaomiaoPSUDiversity Chair, Technical Lead, Executive CommitteeAtomistic modeling of phonon transport.
ManleyMichaelORNLTechnical LeadLattice anharmonicity challenge
HuaZilongINLTechnical LeadOxide interface challenge
MayBrelonINLTechnical LeadNitride interface challenge
ZhangYanwenINLTechnical LeadIrradiation defects
GofrykKrzysztofINLTechnical LeadElectronic structure measurements
KhanolkarAmeyINLTechnical LeadMicrostructure characterization
BawaneKaustubhINLTechnical LeadMicrostructure characterization
KombaiahBoopathyINLTechnical LeadMicrostructure characterization
JiangChaoINLTechnical LeadMicrostructure evolution modeling
ZhangYongfengUWTechnical LeadMicrostructure evolution modeling
MannMathewAFRLTechnical LeadSample syntheses (oxides)
SoobyElizabethUTSATechnical LeadSample synthesis (nitrides)
SelimFaridaASUTechnical LeadMicrostructure characterization

Advisory Committees

External

• Professor William Weber (University of Tennessee – Irradiation Effects in Fuels and Materials)

• Professor Michele Manuel (University of Florida – Atom Probe Tomography)

• Professor Kristjan Haule (Rutgers University – Computational Electronic Structure)

• Professor Keith Nelson (Massachusetts Institute of Technology – Experimental Methods in Condensed Matter Physics)

• Dr. James Belak (Lawrence Livermore National Laboratory – Computational Materals Science)​