Superconductivity in magnetically doped SrTiO3
Abstract
Doped SrTiO3 is a superconductor whose pairing mechanism is still not fully understood. The response of a superconductor to impurities has long been used to obtain insights into the nature of the superconducting state. Here, the superconductivity of SrTiO3 films that are doped or alloyed with different rare earth ions, which carry a magnetic moment, is investigated. It is shown that large concentrations (up to a few percent) of rare earth ions with unpaired f-electrons, such as Sm and Eu, do not reduce the superconducting critical temperature and critical fields. The finding is independent of whether the rare earth ion acts as a dopant or is an isovalent impurity. The interactions between the superconducting condensate and the magnetic dopants that could result in the observed insensitivity to magnetic impurities are discussed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 17, 2021
- Source ID
- 10.1063/5.0052319
Entities
People
- Hanbyeol Jeong
- John W. Harter
- Luca Galletti
- Ryan Russell
- Salva Salmani‐Rezaie
- Susanne Stemmer
- Timo Schumann
- Yuntian Li
Organizations
- Army Research Office
- National Science Foundation
- United States Department of Energy