Formation of a new group
Creation of the group, following the appointment of Erwann Bocquillon. The group is from now on looking for new members: post-doc, PhD students or MSc students. If you are interested, please write an e-mail at bocquillon
ph2.uni-koeln.de.
First team outing, Siebengebirge
On the 22nd of July 2022, the work group of Prof. Erwann Bocquillon enjoyed their first team outing. The group activity included a hike to one of the highest points of the Siebengebirge, the old ruins of Löwenburg (455m). After a refreshing picknick the hike continues to Burg Drachenfels (320m).
Installation of 7.2mK cryogenic temperature measurement setup
May 15th through May 28th the workgroups first cryogenic measurement setup has been installed. With the help of Bluefors' Cryo Engineer Sajed Rabbani, Senior Site Planning Engineer Marija Macic-Järvinen and many more on- and off-site support the Bluefors LD system reached 7.2mK base temperature. The system is equipped with 48 DC lines separated in two lines of 12 twisted pair looms. DC lines are filtered using Basel Precision Instruments' Microwave filter and Thermalizer for a guaranteed reduction of -60dB and more for unwanted high frequency noise above 10MHz. Additionally, 4 pairs of radiofrequency lines for the application and the amplification of radiofrequency signals are installed to study the dynamic transport properties of novel quantum materials.
Team Outing - Hochseilgarten Blackfoot Forrest and Blackfoot Beach
Celebrating one year after the first PhD student Boris Stanchev arrived, the workgroup Bocquillon went on their second group outing. On the 23rd of June the group tested their teamwork abilities in up to 12m above ground in the climbing parcours of the Blackfoot forrest 'Hochseilgarten'. After this physical exercise at record breaking temperatures, the group enjoyed time at the nearby blackfoot beach, swimming and enjoying cold drinks. The picture shows from left to right: Michael Lee (ML4Q intern, Yale University), Daniel Rosenbach (PostDoc), Torsten Roeper (PhD Student), Boris Stanchev (PhD Student), Prof. Erwann Bocquillon and Hugo Thomas (Master intern, ENS Paris).
Installation of second cryogenic temperature measurement setup
October 23rd through October 31st the workgroups second cryogenic measurement setup has been installed. We again got valuable support from Bluefors' Cryo Engineer Sajed Rabbani, Senior Site Planning Engineer Marija Macic-Järvinen and many more on- and off-site support from Bluefors. On sunday the 29th of October the LD system with 6-1-1 vector magnet reached 8.9mK base temperature for the first (but not the last) time in our laboratory. The system will be dedicated to ultra-sensitive electronic noise measurements and the d.c. study of magnetic domain switching in quantum anomalous Hall devices.