PhD position in Nematic superconductivity in topological materials

The Institute of Physics (IoP) of the Faculty of Science combines the Van der Waals-Zeeman Institute (WZI), the Institute of Theoretical Physics (ITFA) and the Institute for High Energy Physics (IHEF) and is one of the large research institutes of the faculty of Science at the University of Amsterdam. A PhD position is available in the Quantum Matter Amsterdam Group of the WZI at the University of Amsterdam.

Research

Superconductivity is a fascinating state of matter. The project focuses on new family of superconductors that is obtained by doping a topological insulator: Bi2Se3-based superconductors. We will explore a recent experimental discovery, namely rotational symmetry breaking in the macroscopic superconducting parameters [1]. The rotational symmetry breaking is attributed to an unconventional superconducting state with odd-parity symmetry. By examining the superconducting parameters in detail we wish to provide solid proof for nematic superconductivity in the Bi2Se3-based superconductors. The novel insight might turn out to be crucial in the design of new topological superconductors.
[1] Y. Pan et al., Sci. Reports 6, 28632 (2016).

Project description

In this PhD project the superconducting properties of the family of Bi2Se3-based superconductors will be investigated by different experimental techniques, such as torque magnetometry, field-angle dependent specific heat and scanning tunneling microscopy (STM). The project involves magnetic and transport measurements at low-temperatures and high-magnetic fields, as well as the construction of a specific heat cell that can rotate in the magnetic field. The PhD project will be carried out in the Quantum Matter Amsterdam group at the Institute of Physics of the University of Amsterdam. The low temperature equipment includes a PPMS (Quantum Design), a Heliox Helium-3 refrigerator and a Kelvinox MX100 dilution refrigerator (both Oxford Instruments). The Institute has excellent equipment for the preparation of single-crystalline samples and their characterization. Low temperature STM experiments will be performed in-house, as well as in the LT-Scanning Probe Microscope at Leiden University.

Requirements

We seek a highly motivated student with excellent experimental skills and a strong interest in condensed matter physics. The candidate should hold a Masters degree (or equivalent) in experimental physics.
Further information
For information please contact/check:
dr A. de Visser
T: +31 (0)20 525 5732 (after 30th October)

For further details see here. Applications can be submitted through this form.

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