illuminated Helium laboratory from outside through the window


Conferences & Workshops

Dec. 4-5. 2018 UKRATOP Workshop, IFW Dresden

Oct. 1 – 2, 2018

 

SAW Symposium, Westin Bellevue Dresden, Dresden, Germany

Sept.-15-20, 2019 

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

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


Montag 10.12.2018
IMW-Sonderseminar09:00
Ort IFW Dresden D2E.27
Referent Lee Kheng Tan
Thema Atomic Layer Deposition as 1D, 2D and 3D structures
ALD has been a thin film deposition tool developed and widely used in microelectronics industries for decades. The distinctive attractiveness of ALD are its precise film thickness control and conformal film deposition. Thus, this presentation seeks to investigate these uniqueness by using ALD as a nanofabrication tool in the preparation of nanomaterials such as 1D TiO2 nanotubes arrays (NTAs), 2D MoS2 films and dendrites, 3D micro- and nanostructures, and also their potential applications.

An approach termed “template-assisted ALD” which consists of both porous anodic alumina (PAA) template and ALD technique, results the growth of 1D TiO2 nanotube arrays (NTAs) on substrates. The nanotube wall-thickness is controlled by the number of deposition cycles. Pd nanoparticles functionalized TiO2 NTAs act as UV light-activated photocatalyst. The photodegradation efficiency depends on the nanotube’s wall-thickness and high surface area. ALD process deposit TiO2 films conformally onto PAA templates which have different dimensions and morphologies. Vertically standing TiO2 NTAs are ideal photoanodes for dye-sensitized solar cells. The conformal coating of ALD process are also demonstrated on 3D ALD TiO2 structures from biological template such as insect fly’s wing and 3D laser printed structures.

ALD process using vapor phase precursors prepares 2D MoS2 mono- and multilayers films on sapphire substrates. The monolayer MoS2 film having a triangular crystals structure after annealing process, exhibited high photoluminescence emission in visible range. Alternatively, a modified ALD process using liquid phase precursor and spin-spray method, prepares MoS2 films consisting of triangular and dendrite morphologies on sapphire substrates. This liquid atomic layer growth by spin-spray (LAL-SS) approach produces MoS2 film with monolayer thickness and controllable morphology, without the use of high vapor pressure precursors and a vacuum system. This cost-effective LAL-SS process is capable to produce TMDCs crystals for applications in photonics, electronics and catalysis. It also paves the ability to discover more shape-dependent properties for other TMDCs materials.


Eingeladen von Dr. Andy Thomas
Kontakt Ines Firlle

Montag 10.12.2018
ITF-Seminar11:00
Ort IFW Dresden A2E.30
Referent Marius Scholten
Thema Dzyaloshinskii-Moriya Interaction on the Interface of a Topological Insulator and a Magnetic Material
We investigate the interface of a hybrid heterostructure consisting of a topological insulator and a ferromagnet. As has been shown recently, the interface of such a system can host skyrmions as a consequence of an emerging Dzyaloshinskii-Moriya interaction at temperatures above the Curie temperature [1]. Here, we analyze what happens in the magnetically ordered phase and in the presence of the long-range Coulomb interaction between the Dirac electrons. Due to the opening of the gap in the Dirac spectrum in the magnetically ordered phase the magnetoelectric Chern-Simons action emerges, which opens up the possibility of magnetoelectric manipulation of skyrmion structures on the interface.

[1] Flavio S. Nogueira, Ilya Eremin, Ferhat Katmis, Jagadeesh Moodera, Jeroen van den Brink, Volodymyr Kravchuk, Phys. Rev. B 98 060401(R) (2018).
.


Eingeladen von Dr. Flavio de Souza Nogueira
Kontakt Grit Rötzer

Montag 10.12.2018
IFF-Doktorandenseminar15:00
Ort IFW Dresden D2E.27
Referent Lukas Spree
Thema Derivatization of Magnetic Endohedral Fullerenes
Eingeladen von Prof. Dr. Bernd Büchner
Kontakt Christine Malbrich

Dienstag 11.12.2018
IMW-Sonderseminar15:00
Ort IFW Dresden B3E.26
Referent Pedro Deminsky
Thema Area-selective Atomic Layer Deposition & Laser Induced Materials Processing in Advanced Micro- & Nanopatterning
Micro and nanoscale film patterning and nanostructures growth are an essential parts of modern microelectronics industry. As device scaling proceeds toward sub-10 nm era where process tolerances become atomic-scale, the adoption of alternative nanoscale process integration schemes become critical for novel device concepts. Area-selective atomic layer deposition (AS-ALD) has attracted immense attention in recent years for self-aligned accurate pattern placement with subnanometer thickness control. From another prospective, laser induced periodic surface structuring is another low-cost and high-speed method for the creation of periodic nanostructures with femtosecond pulses.
In this talk, after a brief overview of area-selective atomic layer deposition, I will present a methodology to achieve AS-ALD by using inductively couple plasma grown fluorocarbon polymer, PMMA and PVP films (as hydrophobic blocking layer materials), and graphene (as a lift-off material). Our approach has been tested for noble metals (Pt, Pd), metal-oxides (TiO2, ZnO, Al2O3, HfO2), and III-Nitride materials (AlN, InN) using thermal and plasma-enhanced ALD processes. Then I will continue with laser-induced periodic materials processing in femtosecond mode regime and will describe its impact on surface micro- & nanopatterning. I will then move to area-selective laser-material processing and will present our accomplishment of developing superhydrophobic/superhydrophilic interfaces for wettability applications. Finally, I will discuss necessity of extending the already existing methods for selective materials deposition/processing and will describe the future directions of the development of efficient and convenient AS-ALD processes.


Eingeladen von Dr. Andy Thomas
Kontakt Ines Firlle

Mittwoch 12.12.2018
IMW-PhD Seminar 11:00
Ort IFW Dresden D2E.27
Referent Aleena Anna Thomas
Thema Influence of strain on superconducting properties in Iron based superconductors
Eingeladen von Prof. Kornelius Nielsch
Kontakt Ines Firlle

Lectures next week


Montag 17.12.2018
IFF-Doktorandenseminar15:00
Ort IFW Dresden D2E.27
Referent Michael Bretschneider
Thema Trap states in organic semiconductors
Eingeladen von Prof. Dr. Bernd Büchner
Kontakt Christine Malbrich

Mittwoch 19.12.2018
IMW-Seminar10:00
Ort IFW Dresden D2E.27
Referent Victorino Franco
Thema Studying Phase Transitions and Critical Phenomena via Magnetocaloric Studies
The increasing concern of our society about energy efficiency, together with the fact that temperature control accounts for a large portion of the energy consumption at homes and commercial buildings, has fostered research on the applicability of magnetocaloric materials for magnetic refrigeration [1]. Most of the current studies on magnetocaloric materials focus on the optimization of their properties for room temperature magnetic refrigeration. The aim of this talk is to show that MCE can also be used for characterizing magnetic phase transitions. We will present examples in which universal scaling of the magnetic entropy change is used to determine critical exponents and transition temperatures [2] (even when standard techniques could not be applied). We will also show that the scaling nature of MCE can be used to determine the order of a phase transition and helps us to identify the composition of the so-called tricritical point [3,4]. The study of magnetocaloric materials with a first order phase transition will be tackled by the use of temperature-FORC and applied to Heusler-type alloys.

Victorino Franco is a Professor at the Condensed Matter Physics Department, Sevilla University, Spain. He obtained his PhD in Physics from Sevilla University in 1999. His research interest focuses on magnetic materials for energy applications, including soft magnetic and magnetocaloric materials. He published over 170 papers in international journal, receiving more than 3100 citations (excluding self citations) and has an h-index of 35. He has been visiting professor at numerous universities and research labs worldwide and has been recipient of Young Scientist Awards from the Spanish Royal Physical Society (2000) and from the Royal Order of Chivalry & Royal Academy of Sciences of Sevilla (2005). He is currently Chair of the Spain Chapter of IEEE Magnetics Society and was the Chair of the Magnetic Materials Committee of the Minerals Metals and Materials Society (TMS) (2012-2014). He has been the Publication Chair for MMM-2017 (Pittsburgh) and will serve in the same role for the Joint MMM-Intermag 2019 and MMM 2019. He has been elected as the General Chair for the Joint MMM-Intermag that will take place in New Orleans in 2022 and will be 2019 IEEE Magnetics Society Distinguished Lecturer.


Eingeladen von Dr. Thomas George Woodcock
Kontakt Ines Firlle

Dresden Science Calendar

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