August 2021 – The electronic structure of the vortex cores in copper oxide high temperature superconductors (HTS) is a long-standing puzzle. Using scanning tunneling spectroscopy at an unprecedented low magnetic field for any HTS, we succeeded in measuring the intrinsic vortex core structure in heavily overdoped Bi2Sr2CaCu2O8+d. We find the characteristic electronic signature predicted for…
Group Renner
Physical Review Letters
December 2020 – We present a first detailed study of the charge density wave (CDW) contrast inversion in scanning tunneling microscopy (STM) images. Combining high resolution STM imaging at different tunneling biases and density functional theory, we demonstrate that contrast inversion is very sensitive to the position of the CDW gap with respect to the…
Welcome
December 2020 – Welcome to Ishita Pushkarna who joins the group from India. She is starting a PhD on scanning probe microscopy and spectroscopy of transition metal dichalcogenides, with particular emphasis on their electronic properties as a function of external tuning parameters.
Flexibility Grant
November 2020 – Congratulations to Dr Arpad Pasztor who successfully applied for a Flexibility Grant by the SNF, starting January 2021.
Welcome
November 2020 – Welcome to Andreas Ørsted who joins the group from Denmark. He is starting a PhD on the investigation tuneable electronic properties of transition metal dichalcogenides by scanning probe microscopy and spectroscopy.
IOP trusted reviewer
September 2020 – On 23 September 2020, Pr Christoph Renner was awarded IOP trusted reviewer status. This status acknowledges “a high level of peer review competence, with the ability to critique scientific literature to an excellent standard” according to the citation. Prof Renner is among the first IOP reviewers to receive this newly introduced recognition.
PhD Degree
September 2020 – Congratulations to Tim Gazdic who successfully defended his PhD thesis on September 8, 2020. He performed a range of beautiful scanning tunneling microscopy and spectroscopy studies of highly overdoped Bi-2212. Among the key findings is a strong charge-order like reconstruction which is actually due to quasi-particle interferences. He also observes for the…
Welcome
September 2020 – Welcome back to Dr Marilena Longobardi who joins the group part time to assist with advanced practicals. Students will benefit from her expertise in STM while her main activity remains as Chief International Relations Officer for the Beijing Academy of Quantum Information Sciences.
Subside Tremplin – Congratulations
April 2020 – Congratulations to Dr. Lihuan Suni for the subside tremplin 2020 she has been awarded by the University of Geneva. Lihuan is a postdoctoral researcher visiting from China. This award frees Lihuan from teaching duties for one semester to work full time on her research project.
Physical Review Research
November 2019 – Combining real space and reciprocal space analysis of scanning tunneling microscopy images of transition metal dichalcogenides, we obtain real space maps of the amplitude, phase and periodicity of the complex charge density wave (CDW) order parameter. These maps show that the CDW in these materials consist of up to three coexisting unidirectional…
Réalisation : Sur Mesure concept