...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, B. Condensed Matter >Heat capacity of a 2DEG
【24h】

Heat capacity of a 2DEG

机译：2DEG的热容量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We review recent heat capacity experiments performed on GaAs/AlGaAs heterostructures containing two-dimensional electron layers. Near v=1, the strong coupling to the nuclear spin system attributed to Skyrmion-induced low-energy spin excitations has a dramatic effect on the heat capacity which rises by orders of magnitude. We show that this giant heat capacity is consistent with the Schottky nuclear heat capacity of Ga and As atoms in the quantum wells, except at very low temperature where heat capacity exhibits a remarkably sharp peak suggestive of a phase transition in the electronic system. We also report quasi-adiabatic experiments providing quantitative evidence that the sharp peak in heat capacity is due to an enhanced nuclear-spin diffusion from the GaAs quantum wells into the AlGaAs barriers. Finally, we present the latest heat capacity results which probe the presence or the absence of Skyrmions at large Zeeman energy. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 35]
机译：我们回顾了最近在包含二维电子层的GaAs / AlGaAs异质结构上进行的热容量实验。接近v = 1时，归因于Skyrmion诱导的低能自旋激发的核自旋系统的强耦合对热容量产生了显着影响，热容量上升了几个数量级。我们表明，这种巨大的热容量与量子阱中Ga和As原子的肖特基核热容量一致，除非在非常低的温度下，该热容量显示出非常尖锐的峰，表明电子系统中存在相变。我们还报告了准绝热实验，这些实验提供了定量证据，表明热容量的尖峰是由于自旋从GaAs量子阱到AlGaAs势垒的扩散增强。最后，我们提供了最新的热容结果，该结果探讨了在大塞曼能量下是否存在Skyrmions。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：35]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号