Progress in Spintronics and Graphene Research

Date :From 2010-04-26 To 2010-07-02
Advisory committee :
Local coordinators :Xin-Cheng Xie(Chair),Yue Yu(contact person),Li Sheng,Jun-Ren Shi,Ke Xia
International coordinators :For spintronics: Gerrit E.W. Bauer(Chair, contact person), Allan H. Macdonald, 前川禎通Sadamichi Maekawa,谢心澄Xin-Cheng Xie For Graphene: Vladimir Falko (Chair, contact person), Boris Altshuler,Carlo Beenakker, Francisco Guinea


Collective Spin Dynamics in Nanostructures(sub-program, Apr 26 - Jul 2,2010):
There has been considerable progress over the past several years in exploring and understanding spin coherence and spin transport in metals and semiconductors. In metals, activity has concentrated on studies of the transport properties of nanoscale magnetic structures and devices. In semiconductors, the phenomena that have been studied include conduction electron spin coherence, nuclear spin coherence, coupling of electron spins to optics, and direct manipulation (electrical, magnetic, or optical) of a nonequilibrium spin state. These two related fields, usually grouped together under the term spintronics, have been a focal point for the condensed matter science community. Interest in spintronics is motivated in part by the technological appeal of the electron spin degree of freedom, which has already and will likely continue to enable new functionalities in electronic devices. The applicability of fundamental results has created a field in which the interests of theoretical, computational, experimental, and device physicists have an unusually large overlap.
The KITPC/CAS program will highlight both fundamental physical phenomena related to spin coherence and advances in spintronic device concepts. The goal is to accelerate progress in the theory of these systems, and also to allow theorists new to this emerging and exciting field to find their bearings. Participants will attempt to uncover new phenomena and to put in place the basic theoretical principles which can be used to build models of spintronic devices. Examples of problems for which theoretical progress is required include collective spin dynamics in the presence of charge and heat currents, spin transport in systems with strong spin-orbit interactions, creation and decay of electron spin coherence, magnetization reversal times and the dissipation associated with magnetization dynamics. An important goal for the program will be the pursuit of new physics that enables transport based logic and data storage circuits with low power consumption. The emerging concepts that give rise to the hope for a breakthrough are related to magnetization currents and associated phenomena such as quantized spin conductance, spin Seebeck effect, and the (quantum) spin Hall effect. The program will be driven in part by the latest experimental advances. Experimentalists that achieved cutting-edge progress will therefore constitute a small but key percentage of the program participants.
The program may be seen as the third biannual event of a series started by the KITP Santa Barbara Program on Spintronics, March-June 2006 and continued by the Yukawa Institute Workshop on Spin Currents in Condensed Matter, October-November, 2008. It is perceived that the increased impact of countries from East Asia in general and China in particular on the fundamental and applied research on Spintronics make the KITPC/CAS a particularly attractive host.
 Graphene (sub-program, Apr 26 - Jun 4, 2010):
The Graphene part of the Programme will address a broad spectrum of issues of fundamental science of graphene. This will encompass studies of quantum transport in disordered and patterned graphene and nanoribbons, quantum Hall effects in monolayer and bilayer graphene, properties of graphene with functionalised bonds, effects of the electron-electron and electron-phonon interaction on graphene spectral properties. The programme will primarily aim at establishing new collaborations and discussions between participants, but it will also include scheduled seminar talks.