Recent job offers

The Collaborative Research Center “Correlated Magnetism: From Frustration to Topology” (CRC 1143) invites applications for a

        Research Associate / PhD position (project C01)

One of the most important tuning parameters to study quantum phenomena infrustrated magnetic materials isthe magnetic field. Magneticfields may induce novelquantum phases with emergent excitations (as for example magnetic monopoles)and non-equilibrium dynamics. The project C01 studies the thermodynamicproperties and spin-lattice interactions ofmagnetically frustrated and topologicalmaterials up to the highest available magnetic fields (up to 95 T and beyond). Forthat, high-resolution specific-heat measurements (in static fields) as well asmagnetization, magnetostriction, magnetocaloric, ultrasound, or occasionallyelectrical-transport experiments (in static and pulsed fields) down to very lowtemperatures (about 10 mK) will be utilized.

The PhD student is especiallyresponsible for measurements of magnetostriction andthermal expansion as well as the magnetization of new magnetically frustratedmaterials in static and pulsed fields.Therefore, the knowledge of cryogenictechniques is desirable. In addition to theexperiments, simulation calculations withsimple models of magnetic interactions ("mean-field") have to be realized. The workis carried out alternativelyat the TU Dresden, Institutof Solid State and MaterialsResearch (IFMP) and at the Helmholtz-Zentrum Dresden-Rossendorf.

The position is available starting at1st May 2019for a duration of3.5 years.Further information you can find at the CRC homepage

https://tu-dresden.de/mn/physik/sfb1143

Requirements:

• MSc or Diploma in Physics (or comparative field of study)
• Motivation, interest in this field ofresearch, experimentalexperience in low-temperature measurements
• Optimally: knowledge in computer technique and automation of experiments

In particular, our PhD students can take advantage of:

•individual supervision by experienced scientists
•participation at international conferences, colloquia at institutes, as well asparticipation at the PhD seminars andthe Summer School of the CRC – withcontributions such as talks or posters
•Graduate Academy of the TU Dresden:qualification program, travel andconference awards, bridgingfunding or completion grants
•language courses: German courses for foreign PhD students and Englishcourses for our German students
•communication courses,media training, etc.

Online applicationPlease apply online:english/german at
Privatdozent Dr. Mathias Dörr
Technische Universität Dresden,
Institut für Festkörper- und Materialphysik (IFMP)
D-01062 Dresden
Germany.

Email: mathias.doerr@tu-dresden.de

Job Offers
2 PhD positions available!

The group Physics of Quantum Materials is seeking two new PhD students for the Collaborative Research Center CRC1143:

• X-ray spectroscopy: Electronic degrees of freedom and their excitations. For a thorough understanding of frustrated magnetic materials and in the search for materials realizing novel magnetic states of matter, it is essential to, firstly, determine the active electronic degrees of free- dom and, secondly, examine their various interactions. The objective of project C06 is to do exactly this. More specifically, we want to clarify how local and non-local interactions determine the magnetism of frustrated Ir, Os, and Ru compounds, including their pyrochlore and honeycomb variants. Special attention will be paid to the intricate interplay between crystal field effects, spin-orbit coupling, and covalence. To this end, cutting-edge x-ray spectroscopy experiments at synchrotron light sources will be performed as a function of temperature, applied magnetic field and hydrostatic pressure. The task will be to investigate electronic order as well as local and collective electronic excitations by means of resonant elastic and resonant inelastic x-ray scattering.
• Strain tuning of frustrated magnets. Frustrated magnetic materials exhibit a variety of unconventional magnetic ground states, which emerge from a delicate balance between different magnetic couplings. This balance typically depends critically on the lattice geometry of the material, meaning that the magnetic ground state of frustrated systems is usually very sensitive to applied lattice deformation. Indeed, the response of a frustrated magnet to a lattice change can serve as a fingerprint of the magnetic interactions at play. In C09 we will therefore use uniaxial stress as tool for tuning the structure of frustrated magnets and study their response to this change.  In order to understand the influence of externally applied uniaxial pressure on magnetism, it is necessary to precisely determine the resulting structural changes. In this work, state-of-the-art X-ray techniques in the laboratory and at large-scale research facilities are to be developed and used for this purpose. You will then apply these to frustrated magnets and possible spin liquids.

In case of interest, please contact Prof. Dr. Jochen Geck.