Conference on Spin Coherence, Condensation and Superfluidity
Abstract
The conference program builds upon the recent foremost advances in spintronics: from spin Seebeck and spin Hall effects to spin superfluidity. The agenda is structured around the collective spin-coherent transport phenomena in magnetic insulators. The overarching goal in this field is to establish regimes of low-dissipation classical and quantum spin dynamics, as exemplified by the magnonic condensates and spin superfluids. Antiferromagnets are emerging as materials that are central to these efforts, with ferromagnets and frustrated spin liquids also playing important roles as conceptual and practical testbeds for some of the key ideas. The main emphasis in the conference will be put on different scenarios and regimes of magnon condensates and the associated superfluid transport of spin and energy. The broad expertise of the proposed experimental participants reflects the richness of the tools that are necessary to induce, control, and probe nonequilibrium spin states in magnetic insulators, both the precursors to and the actual condensates.These include spin Hall and spin Seebeck effects for thermoelectric injection and detection of spin transport, Brillouin light scattering and diamond NV centers for probing collective spin states and dynamics, integration with classical and quantum microwave circuitry, as well as a range of emergent magnetoresistive, magnetoelectric, and magnetoelastic tools that are sensitive to spin textures and dynamics. Theoretical emphasis will be placed on the ideas for realizing spin condensates in and out of equilibrium and exhibiting their fascinating transport properties. These concern the effectively easy-plane magnetic materials, the parametrically pumped classical magnonic condensates, and the thermoelectrically pumped Bose-Einstein condensates.The ensuing superfluidity, its two-fluid characteristics for the coupled spin and heat flows, and the onset of the macroscopic quantum coherence at low temperatures constitute the backbone of the program. The low-dissipation room-temperature collective spin transport and its promise for spin interconnects and logic (based on the interplay of the spin superfluidity and the domain-wall motion) will be addressed as a promising outlet for novel device ideas. The recent rapid strides in the underlying theoretical ideas and the concurrent impressive experimental advances are promising to foment an explosive development of this field. This conference, which is first of a kind, is not only timely but is needed to organize and direct the collaborative efforts by the key scientists. The objectives of building up novel phenomenologies for robust low-dissipation spin transport and dynamics, both at low and high temperatures, should be of strategic relevance to the scientific and technological interests of the US Army.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 15, 2018
- Source ID
- W911NF1710106
Entities
People
- Yaroslav Tserkovnyak
Organizations
- Army Contracting Command
- United States Army
- University of California, Los Angeles