Welcome to the website of Dr. A. de Visser. I am member of the Hard Condensed Matter group at the Van der Waals-Zeeman Institute for Experimental Physics, which is part of the Institute of Physics of the Faculty of Science, University of Amsterdam. My research field is Quantum Electron Matter, with a focus on strongly correlated electron phenomena, notably quantum criticality and unconventional superconductivity, and topological insulators. On this site you will find a brief description of research projects, an outline of experimental facilities, group members and scientific output. Recent publications and theses are available as pdf files.

New

  • Rotational symmetry breaking in the topological superconductor SrxBi2Se3 probed by upper critical field experiments: Scientific Reports 6 (2016) 28632.
  • Quantum oscillations of the topological surface states in low carrier concentration crystals of Bi2-xSbxTe3-ySey: Solid State Comm. 227 (2016) 13.
  • Magnetic and superconducting phase diagram of the half-Heusler topological semimetal HoPdBi: J. Phys.: Condens. Matter 27 (2015) 275701.
  • Low carrier concentration crystals of the topological insulator BSTS: a magnetotransport study: New J. Phys. 16 (2014) 123035.
  • Review paper on Half-Heusler topological insulators: Materials Research Society Bulletin 39 (2014) 859-866.
  • Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe: Phys. Rev. B 89 (2014) 214512-1:5.
  • Low field magnetic response of the non-centrosymmetric superconductor YPtBi: Solid State Comm. 183 (2014) 13.
  • Superconductivity and magnetic order in the noncentrosymmetric half-Heusler compound ErPdBi: Europhys. Lett. 104 (2013) 27001 (Editor's choice).
 

News

Rotational symmetry breaking in topological superconductor

Our group, in collaboration with the Institute for Materials Science in Tsukuba (Japan), has discovered an exceptional new quantum state within a superconducting material. This exceptional quantum state is characterised by a broken rotational symmetry – in other words, if you turn the material in a magnetic field, the superconductivity isn't the same everywhere in the material.

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Highlights

Superconductivity in noncentrosymmetric half-Heusler compound ErPdBi
Superconductivity in noncentrosymmetric half-Heusler compound ErPdBi

Our recent publication on the superconducting and magnetic properties of ErPdBi has been published as Editor's choice in Europhysics Letters.

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