Research interests

The research in the Golden Lab focuses on the experimental investigation of the electronic structure and properties of quantum matter and emergent materials. Our aim is to understand the surprising behaviour of low dimensional and strongly interacting electronic systems.

To do this, we apply direct spectroscopic probes of the electronic system, resolved in energy, momentum and real space. In the lab, the main experiments are ARPES, XPS, LEED and STM/STS. At international user facilities, we use the special properties of synchrotron light in the VUV, soft- and hard X-ray regimes for photoemission, X-ray absorption, dichroism and (resonant) X-ray scattering experiments.

In the Amsterdam lab, we also make new materials, growing high-quality single crystals in a variety of ways for our spectroscopic experiments, optical probes in the van Heumen lab and (magneto)transport in the de Visser lab.

For a break-down of the research topics we are currently working on,  click here.

 

News

Knobs control Dirac energy in topological insulators

Four knobs - bulk stoichiometry, surface decoration, temperature, and photon exposure - are shown to control the energy of Dirac surface states in topological insulators, and can be used to determine the true 'flat band' energy band alignment at the surface of binary, ternary or quaternary 3D TI's.

Interfacing 3D topological insulator BSTS with Ag, Fe and Nb published in PRB

PRB now out on the electronic structure of interfaces between the bulk insulating 3D topological insulator BSTS and a commonly used contact metal (Ag), a magnetic metal (Fe) and a superconductor (Nb) metal on the bulk TI BSTS.

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Highlights

Switching speed limit in magnetite.
Switching speed limit in magnetite.

Magnetite is a model system for understanding correlated oxides. Nevertheless, the exact mechanism of the insulator–metal, or Verwey, transition has long remained inaccessible. In our Nature Materials paper published in the summer of 2013 we show that we can switch this material from insulating to metallic on unprecedented short time scales.

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