illuminated Helium laboratory from outside through the window


Conferences & Workshops

2020  
June 2-5, 2020 

nature conference: Microrobots and Nanorobots for Biotechnology, DGUV Akademie Dresden, Germany

March 15-20, 2020 DPG-Frühjahrstagung, Dresden
 
Feb. 10/11, 2020 

Sächsischer Forschungs- und Vernetzungs-workshop »Thermoelektrische Anwendungen in der Industrie«, Meißen

Jan. 23/24, 2020 BIOREMIA Kick-off Meeting, IFW Dresden
 
2019  
Sept. 25-27, 2019 Annual IFW Summer School for PhD students in Szczecin, Polan
 

Sept. 15-20, 2019

 

ECASIA19: 18th European Conference on Applications of Surface and Interface Analysis

Sept. 13-20, 2019

 Summer School Spectroelectrochemistry, IFW Dresden
May 20/21, 2019 International Workshop "Topology meets materials – Weizmann meets Dresden", IFW Dresden
March 28/29, 2019 

International Workshop "Quantum Dynamics, Transport, and Exotic Orders: Strolling among Spins and Strong Correlations", IFW Dresden

March 28/29, 2019 Joint workshop of BAM Berlin and IFW Dresden, IFW Dresden
2018  

Dec. 4-5. 2018

 UKRATOP Workshop, IFW Dresden

Oct. 1 – 2, 2018

 

SAW Symposium, Westin Bellevue Dresden, Dresden, Germany

Aug. 28-30, 2018 Spin , waves & interactions 2018, Greifswald, Germany

April 8- 11, 2018

 

667. WE-Heraeus-Seminar on System-oriented approach to thermoelectrics: Materials – Interfaces – Devices in Bad Honnef, Germany

March 11-16, 2018

 

Joint Conference of the Condensed Matter Divisions of the DPG and EPS,

  • Session "Geometry and Topology-Controlled Nanoarchitectures", organized by Prof. Dr. V. Fomin, IFW Dresden
  • Symposium “Topology in Condensed Matter Physics (SYTO)”, co-organizer Prof. Dr. Jeroen van den Brink, IFW Dresden
  • Symposium “Voltage Control of Functional Interfaces: Magneto-ionic Meet Memristive Systems (SYVC)”, Co-organizer Dr. Karin Leistner, IFW Dresden
 

Feb. 1, 2018

 

Workshop of the DFG Priority Programme 1458 “High Temperature Superconductivity in Iron Pnictides“, IFW Dresden

Jan.  29-31, 2018

 

EPSQMat 2018: International Workshop on Electron and photon spectroscopies of quantum materials: status and perspectives, IFW Dresden

Lectures this week

Lectures next week


Friday 05.06.2020
IFW Zoom Seminar11:00
Location Join Zoom Seminar: to be announced
Speaker Sabine Wurmehl
Topic Solid state single crystal growth of three-dimensional faceted LaOFeAs crystals
Soon after the discovery of iron-based superconductors, single crystals of various pnictide families were successfully grown using self-flux growth. However, LaOFeAs single crystals are hard to be obtained via flux growth [1]-[2]. Crystals could be successfully synthesized using high-pressure-high- temperature synthesis [3], but this method is limited to rather small crystals and also did not lead to a reasonable growth along the c direction, so far. This lack of large, well-faceted and 3-dimensional crystals is currently hindering their detailed investigation.

Solid state single crystal growth (SSCG) is a crystal growth technique where crystals are grown from a polycrystalline matrix. Here, we present single crystals of the iron pnictide LaOFeAs grown via SSCG. The size of the as-grown crystals are up to 2x3x0.4 mm3. Typical for this method, but very uncommon for crystals of the pnictide superconductors and especially for the oxypnictides, the crystals show pronounced facets and considerable growth in c direction [4]. Current research aims to further understand details of the growth mechanism and to explore growth of crystals with different types of doping using the SSCG method. These crystals are subject of several studies to shed light on the physics of their properties (see, e.g., [5]).

References
1. J.-Q. Yan, et al., Appl. Phys. Lett. 95, 222504 (2009).
2. A. Jesche, et al. Phys. Rev. B 86, 134511 (2012).
3. N. D. Zhigadlo, et al., Phys. Rev. B 86, 214509 (2012).
4. R. Kappenberger, et al., J. Cryst. Growth 483, 9 (2018).
5. L. Wang, et al., J. Magn. Magn Mater. 482, 50 (2019).

Acknowledgments
This work has been supported by Deutsche Forschungsgemeinschaft DFG. The authors thank R. Wachtel, D. Meiler, J. Werner, L. Giebeler, S. Müller-Litvanyi, C. Wuttke and S. Gass (all IFW Dresden) for support and J. M. Ok (POSTECH) for valuable discussions.


Invited by Prof. Dr. Jeroen van den Brink
Contact Grit Rötzer

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