Innovative cutting tools for high-tech alloys
The Department of Quantum Matter Physics (DQMP) has just been awarded a major INNOSUISSE grant for an initiative launched with the Geneva-based company Eskenazi SA, a leader in the manufacture of cutting tools for microtechnology. Founded in 1916 by Marcel Eskenazi, this company is distinguished...
New perspectives in the physics of electronic orders
The charge density wave order is a fascinating electronic phase that appears in some metallic crystals below a critical temperature. It combines a periodic distortion of the atomic lattice and a redistribution of the electronic charge to a standing-wave arrangement. These modulations form new...
d-Wave vortex core
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...
Insight into the CDW gap from STM topography
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...
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.
Congratulations to Dr Arpad Pasztor who successfully applied for a Flexibility Grant by the SNF, starting January 2021.
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
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...
Tim’s 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...
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
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.
Holographic CDW Imaging by STM
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...
Welcome to Tejas Singar who joins the group from India to start a PhD on spin polarized STM.
Welcome to Dr Lihuan Sun who joins the group from China. Her expertise is in time-resolved scanning probe microscopy. She will study artificial transition metal dichalcogenide based heterostructures using scanning tunneling microscopy and spectroscopy.
PRB – Editors’ suggestion
Scanning tunneling microscopy unveils an unusual energy dependent CDW pattern in Cu intercalated TiSe2. It is a direct manifestation of a large doping dependent CDW gap opening below the Fermi level.
Marcello’s PhD Degree
Congratulations to Marcello Spera who successfully defended his PhD thesis on April 3, 2019. He performed a very detailed study of the charge density wave (CDW) ground state in 1T-TiSe2 by scanning tunneling microscopy. Main results include a striking energy dependent CDW patchwork and a rarely...
Arpad’s PhD Degree
Congratulations to Arpad Pasztor who successfully defended his PhD thesis on November 7, 2018. He studied the thickness dependence of the charge density wave in 1T-VSe2 by scanning tunneling microscopy and developed a novel scheme to map the full complex CDW order parameter in real space. He found ...