Approved FOM programme
|Title||Magnon spintronics (MSP)|
|Executive organisational unit||BUW|
|Programme management||Dr. R.A. Duine|
|Cost estimate||M€ 1.4|
This programme focuses on physical mechanisms and materials enabling i) generation, control, and probing spin currents in magnetic insulators, ii) strongly coupled electrons and magnons at interfaces between metals and magnetic insulators, and iii) control of non-equilibrium magnonic many-body states of a magnetic insulator by injection and detection of spin currents across its interface with a normal metal. The ultimate goal of this programme is to achieve electrical and thermal creation and control of room-temperature magnon Bose-Einstein condensates – and the resulting spin superfluidity.
Background, relevance and implementation
The quest for a next-generation beyond-Moore electronics is obstructed the thermodynamic bottleneck that is caused by the dissipation associated with moving electrons. A revolutionary new approach to electronics is based on information processing and transfer in insulators in which the electrons do not move at all. This option becomes possible by employing magnons, i.e., quanta of the spin-wave collective excitations of the magnetization in magnetic insulators, to propagate information. On top of this application perspective, magnon spintronics gives rise to completely new physical phenomena that do not fit the paradigm of single-electron spintronics. These include effects caused by magnonic collective phenomena, such as magnon Bose-Einstein condensation and superfluidity, and by the interaction between magnons and electrons at interfaces between magnetic insulators and normal metals.
This programme develops - in a close collaboration between the consortium partners - new materials, experiments, and theory with the goal to electrically control magnon spin currents and the magnetic order parameter in magnetic insulators. The proposed research consists of four key steps: i) Thermal magnon spin injection, transport and detection , ii) Actuating and switching the magnetic order parameter, iii) Achieving Magnon Bose-Einstein condensation by spin-current injection and iv) Demonstration of spin superfluidity.
The programme is a closed programme. The research is organized in three workpackages, each coordinated by a consortium member (WP1: Palstra; WP2: Van Wees; WP3: Duine) and carried out by one experimental and one theoretical junior scientist (oio or postdoc) who will collaborate closely and will frequently visit each other. Budget is reserved for regular (~twice/year) programme meetings and for future Dutch editions of the international 'Spin Caloritronics' and 'NewSpin' workshops.
The final evaluation will be based on the self-evaluation report initiated by the programme leader and is foreseen for 2020.