金属-氨溶液中金属-非金属转变的性质。我。 低金属浓度下的溶剂化电子

是 否 +2 论坛币

k人 参与回答

经管之家送您一份

应届毕业生专属福利!

求职就业群

赵安豆老师微信：zhaoandou666

经管之家联合CDA

送您一个全额奖学金名额~ !

立即领取

感谢您参与论坛问题回答

经管之家送您两个论坛币！

+2 论坛币

摘要翻译：
利用可极化流体理论，我们将过剩电子的变分处理推广到金属氨溶液(MAS)中金属浓度有限的多电子情形。我们评估了低金属浓度下MAS的介电、光学和热力学性质。我们基于平均球近似的半解析计算与介电常数和吸收光谱的浓度和温度依赖关系的实验数据有很好的相关性。研究发现，局域溶剂化电子之间的偶极相互作用决定了体系的性质，导致了两个主要效应：电子之间的色散吸引和溶液静态介电常数的急剧增加。第一个效应为轻碱金属溶质(Li，Na，K)在临界温度以下提供了经典的相分离。第二个效应导致介电不稳定性，即极化突变，这是金属化的开始。计算的临界浓度轨迹与Na-NH3溶液的实验相图吻合较好。提出的金属-非金属跃迁机制是相当普遍的，可能发生在涉及自囚禁量子准粒子的系统中。
---
英文标题：
《Nature of the metal-nonmetal transition in metal-ammonia solutions. I.
  Solvated electrons at low metal concentrations》
---
作者：
Gennady N. Chuev, Pascal Quemerais, and Jason Crain
---
最新提交年份：
2007
---
分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
--
一级分类：Physics        物理学
二级分类：Strongly Correlated Electrons        强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
--

---
英文摘要：
  Using a theory of polarizable fluids, we extend a variational treatment of an excess electron to the many-electron case corresponding to finite metal concentrations in metal-ammonia solutions (MAS). We evaluate dielectric, optical, and thermodynamical properties of MAS at low metal concentrations. Our semi-analytical calculations based on a mean-spherical approximation correlate well with the experimental data on the concentration and the temperature dependencies of the dielectric constant and the optical absorption spectrum. The properties are found to be mainly determined by the induced dipolar interactions between localized solvated electrons, which result in the two main effects: the dispersion attractions between the electrons and a sharp increase in the static dielectric constant of the solution. The first effect provides a classical phase separation for the light alkali metal solutes (Li, Na, K) below a critical temperature. The second effect leads to a dielectric instability, i.e., polarization catastrophe, which is the onset of metallization. The locus of the calculated critical concentrations is in a good agreement with the experimental phase diagram of Na-NH3 solutions. The proposed mechanism of the metal-nonmetal transition is quite general and may occur in systems involving self-trapped quantum quasiparticles.
---
PDF链接：
https://arxiv.org/pdf/707.4216

扫码加我 拉你入群

请注明：姓名-公司-职位

以便审核进群资格，未注明则拒绝

分享0 收藏0 回帖

关键词：非金属 Experimental interactions Calculations Polarization 经典 溶剂 介电 properties 介电常数