International Workshop on the Dual Nature of f-Electrons 2021 (digital)

International Workshop on the Dual Nature of f-Electrons 2021 (digital)

From June 21st to June 24th 2021

History of the workshop

 

Period

Area

1st workshop

July 16 - July 18, 2006

Santa Fe, USA

2nd workshop

June 28 - July 01, 2008

Santa Fe, USA

3rd workshop

May 25 – May 28, 2010

Dresden, Germany

4th workshop

July 04 – July 06, 2012

Himeji, Japan

5th workshop

May 28  -  May 3, 2014

Suwon, Korea

6th workshop

June 06 – June 10, 2016

Idaho Falls, USA

7th workshop

July 09 – July 13, 2018

Wroclaw, Poland

Motivation of the workshop

Exploring, understanding, and describing materials with strong electronic Coulomb correlations poses a big challenge for modern condensed-matter physics. Well-known examples of such systems include transition metal oxides, metals containing lanthanide or actinide atoms and organic conductors. At low temperatures, these materials exhibit novel phenomena, such as metal-to-insulator transitions, heavy fermion formation, unconventional long-range order as well as pronounced deviations from the typical universal metallic behavior.
This workshop is aimed to provide a venue to discuss discoveries and progress on the nature of f-electrons in many materials. The fascination with these materials results from the “Dual Nature” of the f-electrons that highlights the strong local correlations. The electrons of the partially filled 4f- or 5f- shells mainly preserve their localized atomic characters but strongly modify their properties that depend on long ranged coherence of wave functions. The Coulomb and spin-orbit interactions create a complex and highly correlated electronic state whose response is controlled collectively by the outer-shell electrons. This complexity generates a rich spectrum of physical states and exotic behaviors that pose the most challenging questions of today's condensed matter physics.
Complexity is generally regarded as a resource because it opens up possibilities for new functionalities and therefore novel technical applications. The central challenges in this area are to control material properties, to characterize them with a broad spectrum of measuring methods, and to develop a quantitative microscopic understanding the part of the theory.
This workshop explores emerging areas in strongly correlated quantum matter as exemplified by f-electron systems. Topics include but are not limited to:

  • understanding the relationship between chemistry, crystal structure, and electronic and magnetic properties that could form the basis for materials design
  • exploration of new quantum phases as well as their cooperation, co-existence, or competition in real end engineered materials
  • interpretation of experimental data from depth- and time-resolved spectroscopies
  • concepts and methods for theoretical approaches from combined first-principles and many-body perspectives  

We invite you to contribute and participate in a workshop devoted to debating and discussing the future directions of research and collaborations in the field.
The workshop program will be complemented by tutorials aimed at younger researchers, providing an introduction to current issues and topics.

Time schedule

Time

Monday

June 21, 2021

Tuesday

 June 22, 2021

Wednesday

June 23, 2021

Thursday

June 24, 2021

12:30-13:15

13:30-14:15

Onuki

Richter

Aoki

Severing

Fujimori

Gray

13:30-13:50

13:50-14:10

Aoki

Knebel

14:30-14:50

14:50-15:10

15:10-15:30

Fujimori

Severing

Havela

Kroha

Hassinger

Svanidze

 

Kirchner

Park

Burdin

14:10-14:30

14:30-14:50

14:50-15:10

15:10-15:30

Leithe-Jasper

Haga

Shick

Pikul

15:30-16:00

Break+ discussion

Break+discussion

Break+discussion

 

Break+discussion

16:00-16:20

16:20-16:40

16:40-17:00

Thompson

Kaczorowski

Gofryk

Geibel

Cerna

Richter

Spalek

Tobin

Vyalikh

 

Summary+Closing

17:00-…

 

Discussion

 

Discussion

 

Discussion

 

 

 

 

Programme:

Monday, June 21, 2021

 

 

 

Welcome and opening

 

Tutorials

 

 

12:30-13:15

 

Yoshichika Onuki

Characteristic Electronic States in f-electron Systems

13:30-14:15

 

Manuel Richter

Calculating CEF states by density functional theory

 

 

 

Invited talks

 

 

14:30-14:50

 

Shin-ichi Fujimori

How 5f states are localized

14:50-15:10

 

Andrea Severing

UM2Si2 compounds with 5f electron duality

15:10-15:30

 

Ladia Havela

5f localization tuned by polar bonding in U hydrides

15:30-16:00

 

 

Discussion +

break

16:00-16:20

Joe Thompson

An Experimentalist's Dilemma: What Does 'f-Localized' Mean in a Heavy-Fermion Metal?

16:20-16:40

Dariusz Kaczorowski

Complex magnetic behavior in a novel uranium pnictide UCu1-xBi2

16:40-17:00

Krzysztof Gofryk

On the magnetic and transport behaviors in antiferromagnetic PuPdSn

Tuesday, June 22, 2021

 

 

Tutorials

 

 

12:30-13:15

Dai Aoki

The quest for new magnetic heavy-fermion superconductors

13:30-14:15

Andrea Severing

The crystal-electric field in f-electron materials from an experimenter's point of view

 

 

 

Invited talks

 

 

14:30-14:50

Hans Kroha

RKKY interaction in the 2-impurity Kondo model: the complete phase diagram

14:50-15:10

Elena Hassinger

Phase transition within the superconducting state of CeRh2As2

15:10-15:30

Eteri Svanidze

 

Unveiling intrinsic properties of UBe13

15:30-16:00

 

 

Discussion +

break

16:00-16:20

Christoph Geibel

Evidence for unconventional multipolar order in the Kondo lattice system CeCoSi

16:20-16:40

 

Sylvie Černá

Hydrogen in anomalous rare earths; Ce and Yb systems

16:40-17:00

 

Manuel Richter

5f states in UGa_2 probed by X-ray spectroscopies

Wednesday, June 23, 2021

 

 

Tutorials

 

 

12:30-13:15

 

Shin-ichi  Fujimori

Photoelectron spectroscopies of f-electron materials

13:30-14:15

Alex Gray

Enabling Depth and Time Resolution for X-ray Spectroscopic and Scattering Techniques

 

 

 

Invited talks

 

 

14:30-14:50

Stefan Kirchner

Heavy-electron quantum criticality and single-particle spectroscopy

14:50-15:10

Tuson Park

Pressure-induced quantum critical behavior in La-diluted CeIn3

15:10-15:30

Sebastien Burdin

Photo-emission signatures of coherence breakdown in Kondo alloys

15:30-16:00

 

 

Discussion +

break

16:00-16:20

Jozef Spalek

Modified Schrieffer-Wolff transformation as a tool of analyzing the itinerant to localized evolution of 4f electrons

16:20-16:40

Jim Tobin

The Underlying Simplicity of 5f Unoccupied Electronic Structure

16:40-17:00

Denis Vyalikh

Correlated electrons and new temperature scales at the surfaces of 4f materials

Thursday, June 24, 2021

 

 

Invited talks

 

 

13:30-13:50

Dai Aoki

Multiple superconducting phases and field induced phenomena in novel spin-triplet superconductor UTe2

13:50-14:10

 

Georg Knebel

Magnetic field-enhanced superconductivity in UTe2

14:10-14:30

Andreas Leithe-Jasper

Synthesis and characterization of Be-based Uranium intermetallics

14:30-14:50

 

Alexander Shick

Correlated quasiparticle dispersion and ARPES spectra in UTe2

14:50-15:10

Adam Pikul

Thermal expansion studies of a metamagnetic phase transition in single-crystalline UNi0.38Ge2

15:10-15:40

 

Discussion and

break

15:40-16:00

 

 

Summary and closing

Organizers

Tomasz Durakiewicz, National Science Foundation, Alexandria, Virginia, USA and Idaho National Laboratory, Idaho Falls, Idaho, USA
Shin-ichi Fujimori, Japan Atomic Energy Agency, Japan
Peter S. Riseborough, Temple University, Philadelphia, Pennsylvania, USA
Gertrud Zwicknagl, TU Braunschweig, Braunschweig, Germany

Invited speakers

Dai

Aoki

(Japan)

Silke

Biermann

(France)

Sebastien

Burdin

(France)

Sylvie

Černá

(Czech Republic)

Shin-ichi

Fujimori

(Japan)

Christoph

Geibel

(Germany)

Krzysztof

Gofryk

(USA)

Alex

Gray

(USA)

Elena

Hassinger

(Germany)

Ladia

Havela

(Czech Republic)

Dariusz

Kaczorowski

(Poland)

Stefan

Kirchner

(China)

Georg

Knebel

(France)

Hans

Kroha

(Germany)

Andreas

Leithe-Jasper

(Germany)

Yoshichika

Onuki

(Japan)

Tuson

Park

(Korea)

Adam

Pikul

(Poland)

Manuel

Richter

(Germany)

Andrea

Severing

(Germany)

Alexander

Shick

(Czech Republic)

Jozef

Spalek

(Poland)

Eteri

Svanidze

(Germany)

Joe

Thompson

(USA)

Jim

Tobin

(USA)

Denis

Vyalikh

(Spain)

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