PhD candidate in Nematic superconductivity in topological materials

Employer
University of Amsterdam
Location
Netherlands
Posted
October 06 2017
Position Type
Full Time
Organization Type
Academia

A PhD position is available in the Quantum Matter Amsterdam Group of the Van der Waals-Zeeman Institute (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).


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.



This job comes from a partnership with Science Magazine and Euraxess