DFG Priority Programme 1458

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Workshop "NMR, µSR, Mössbauer spectroscopies in the study of Fe-based and other unconventional high-Tc superconductors"

Program

(35 minutes have been assigned to every talk: 30 minutes of presentation + 5 minutes for questions)

 

Thursday 17th July

09:00 - 09:10   Introduction

 

Session 1.1: The 122 family of iron-based pnictides - Chair: Samuele Sanna

09:10 - 09:45   Hans-Henning Klauß, TU Dresden, Germany. Coexistence of Magnetism and Superconductivity in Charge-Compensated Ba1-xKx(Fe1-yCoy)2As2

09:45 - 10:20   Lucia Bossoni, Universitá degli Studi di Pavia, Italy. Very Slow Spin fluctuations in Ba(Fe1-xRhx)2As2 iron-based superconductors, revealed by Nuclear Magnetic Resonance Spectroscopy

10:20 - 10:55   Hans-Joachim Grafe, IFW Dresden, Germany. Identical spin fluctuations in Cu- and Co-doped BaFe2As2 independent of doped electrons

 

10:55 - 11:25   Coffee Break

 

Session 1.2: Magnetic side of the phase diagrams of high-Tc materials - Chair: Roberto De Renzi

11:25 - 12:00   Seung-Ho Baek, IFW Dresden, Germany. Local probing for structural phase transitions in doped lanthanum cuprates

12:00 - 12.35   Sirko Kamusella, TU Dresden, Germany. Non-collinear magnetism and spin dynamics in La2O2Fe2OSe2 - a µSR, NMR and Mössbauer study

 

12:35 - 14:00   Lunch

 

Session 1.3: Non-superconducting materials - Chair: Pietro Carretta

14:00 - 14:35   Toni Shiroka, ETH Zürich, Switzerland. 1D spin systems at high magnetic fields: from toy models to research tools

14:35 - 15:10   Roberto De Renzi, Universitá degli Studi di Parma, Italy. Overview of magnetic material investigations in Parma: cuprates, cobaltites, nickelates

15:10 - 15:45   Rajib Sarkar, TU Dresden, Germany. Local susceptibility and spin dynamics of ferromagnetic quantum critical system YbNi4(P1-xAsx)2: NMR and µSR investigation

 

15:45 - 16:15   Coffee Break

 

Session 1.4: New theoretical and computational approaches to the experimental techniques - Chair: Dmitry Efremov

16:15 - 16:50   José Lorenzana, Universitá “La Sapienza” di Roma, Italy. Charge fluctuation spectroscopy of superconductors, the charge analog of NMR

16:50 - 17:25   Pietro Bonfá, Universitá degli Studi di Parma, Italy. Determination of muon sites with Density Functional Theory

 

Friday 18th July

Session 2.1: Experimental overview on impurities iron-based pnictides - Chair: Bernd Büchner

08:50 - 09:25   Pietro Carretta, Universitá degli Studi di Pavia, Italy. What can impurities tell us on the iron based superconductors? Ru, Mn and F: the good, the bad and the ugly

09:25 - 10:00   Franziska Hammerath, TU Dresden, Germany. The poisoning effect of Mn in LaFe1-xMnxAsO0.89F0.11: Unveiling a quantum critical point in the phase diagram of iron-based superconductors

10:00 - 10:35   Jörg Fink, IFW Dresden, Germany. Momentum, orbital, and doping dependent scattering rates in NaFe1-xCoxAs and BaFe(As1-xPx)2 investigated by ARPES

 

10:35 - 11:05   Coffee Break

 

Session 2.2: Theoretical approaches to the effect of impurities in pnictides - Chair: Josè Lorenzana

11:05 - 11:40   Brian M. Andersen, Niels Bohr Institutet Copenhagen, Denmark. Poisoning and antidote effects of magnetic impurities in iron pnictides

11:40 - 12.15   Peter Hirschfeld, University of Florida, U.S.A. Interplay of disorder, nematicity and magnetism in Fe-based Superconductors

12:15 - 12:50   Dmitriy Efremov, IFW Dresden, Germany. Disorder induced transition between s+- and s++ states in two-band superconductors

 

12:50 - 14:00   Lunch

 

Session 2.3: Superconducting side of the phase diagrams of high-Tc families - Chair: Toni Shiroka

14:00 - 14:35   Samuele Sanna, Universitá degli Studi di Pavia, Italy. Phenomenological behaviour of the magnetic penetration depth in 1111: a muon spin rotation study

14:35 - 15:10   Gianrico Lamura, CNR-SPIN and Università di Genova, Italy. s-wave superconductivity in high-pressure annealed LaO0.5F0.5BiS2 polycrystals

15:10 - 15:45   Felix Brückner, TU Dresden, Germany. Multigap superconductivity with broken time reversal symmetry in locally non-centrosymmetric SrPtAs

 

15:45 - 16:15   Coffee Break

 

Session 2.4: Iron-based chalcogenides - Chair: Hans-Henning Klauß

16:15 - 16:50   Yurii Pashkevich, National Academy of Science of Ukraine. Spin state alteration of the divalent iron in a distorted tetrahedral coordination – a crystal field guide for the iron based chalcogenides superconductors

16:50 - 17:25   Vadim Ksenofontov, University of Mainz, Germany. 57Fe-Mössbauer study of LiNH2-intercalated FeSe: Evidence for spin fluctuations connected with superconductivity

 

17:25 - 17:30   Closure  

 

 

Contact

Dr. Giacomo Prando

Phone: ++49 (0) 351 4659 668

Fax:     ++49 (0) 351 4659 313

E-mail: g.prando(at)ifw-dresden.de

 

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