2 research outputs found
Discovery of a high-temperature antiferromagnetic state and transport signatures of exchange interactions in a Bi2Se3/EuSe heterostructure
Spatial confinement of electronic topological surface states (TSS) in
topological insulators poses a formidable challenge because TSS are protected
by time-reversal symmetry. In previous works formation of a gap in the
electronic spectrum of TSS has been successfully demonstrated in topological
insulator/magnetic material heterostructures, where ferromagnetic exchange
interactions locally lifts the time-reversal symmetry. Here we report an
experimental evidence of exchange interaction between a topological insulator
Bi2Se3 and a magnetic insulator EuSe. Spin-polarized neutron reflectometry
reveals a reduction of the in-plane magnetic susceptibility within a 2 nm
interfacial layer of EuSe, and the combination of SQUID magnetometry and Hall
measurements points to the formation of an antiferromagnetic layer with at
least five-fold enhancement of N\'eel's temperature. Abrupt resistance changes
in high magnetic fields indicate interfacial exchange coupling that affects
transport in a TSS. High temperature local control of TSS with zero net
magnetization unlocks new opportunities for the design of electronic,
spintronic and quantum computation devices, ranging from quantization of Hall
conductance in zero fields to spatial localization of non-Abelian excitations
in superconducting topological qubits
Abstracts of National Conference on Biological, Biochemical, Biomedical, Bioenergy, and Environmental Biotechnology
This book contains the abstracts of the papers presented at the National Conference on Biological, Biochemical, Biomedical, Bioenergy, and Environmental Biotechnology (NCB4EBT-2021) Organized by the Department of Biotechnology, National Institute of Technology Warangal, India held on 29–30 January 2021. This conference is the first of its kind organized by NIT-W which covered an array of interesting topics in biotechnology. This makes it a bit special as it brings together researchers from different disciplines of biotechnology, which in turn will also open new research and cooperation fields for them.
Conference Title: National Conference on Biological, Biochemical, Biomedical, Bioenergy, and Environmental BiotechnologyConference Acronym: NCB4EBT-2021Conference Date: 29–30 January 2021Conference Location: Online (Virtual Mode)Conference Organizer: Department of Biotechnology, National Institute of Technology Warangal, Indi