Spin and heat transport in one-dimensional quantum magnets

对于一维量子自旋系统，实验和理论研究表明，自旋和热输运系数出人意料地大，在某些情况下发散。这可能是一个全新的自旋输运概念的基础--磁信息的相干输运。在这项拟议的研究中，像磁子这样的纯磁激发将被用来在磁性晶格上携带自旋信息和能量。这种输运现象与电荷运动无关，这是通常利用自旋极化电子流研究自旋输运的前提。在这项拟议的工作中，我们想要阐明自旋和热流在联合热输运和磁共振研究中的驰豫机制和相互依赖。扩展传统的输运和磁共振测量概念，我们希望开发基于热泵产生脉冲自旋和热流的新技术。

For one-dimensional quantum spin systems experimental and theoretical studies indicate unexpectedly large, in some cases diverging, spin and heat transport coefficients. This can be the basis of a radically new concept of spin transport – the coherent transport of magnetic information. In the proposed research, pure magnetic excitations like magnons will be used to carry spin information and energy on magnetic lattices. This transport phenomenon is independent of charge motion, which is the prerequisite of usual investigations of spin transport using spin-polarized electron currents. In the proposed work, we want to clarify the relaxation mechanisms and interdependence of spin and heat currents in combined heat transport and magnetic resonance studies. Extending conventional transport and magnetic resonance measurement concepts, we want to develop new techniques for generating pulsed spin and heat currents based on thermal pumping.