Electron-Lattice Interaction in Strongly Correlated Electron Systems

强相关电子系统中的电子-晶格相互作用

基本信息

批准号：
07044321
负责人：
GOTO Terutake
金额：
--
依托单位：
Research Institute for Scientific Measurements, Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for International Scientific Research.
财政年份：
1995
资助国家：
日本
起止时间：
1995 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07044321/
关键词：
strongly correlated electron systems electron-lattice interaction ultrasound quadrupolar effect heavy Fermion acoustic de Haas effect superconductivity Brillouin scattering

项目摘要

The International Scientific Research Program with a title as "Electron-Lattice Interaction of Strongly Correlated Electron Systems"have been started. Prof. T.Goto and Prof. B.Luthi are head investigators of Japan and German sides, respectively. The out line of the propose in Japanese side are as follows.(1)The quadrupolar response due to the quadrupole-strain interaction of the f-electron systems and the quadrupole ordering in f-electron compounds are still interesting problems. The competition between the quadrupole response and the Kondo effect in Kondo singlet systems of CeRu_2Si_22 and Ce^xLa_<l-x>B_6 and the possibility of the quadrupole Kondo effect in G3 ground state of uranium compound are very important.(2)The ultrasonic investigation by Luthi's group on the heavy Fermino superconductor CeCu_2Si_2 and UPt_3 revealed the unusual magnetic phase diagram. Fujita's group found the peculiar magnetic field dependence of the elastic constants in the high Tc superconductor La_<2-x>Sr_xCuO_4. The microscopic character of the electron-lattice interaction of the high Tc, heavy Fermion and organic superconductors are investigated by the ultrasonic method.(3)The quantum oscillation of the elastic constant at low temperatures, acoustic dHvA effect, is a unique probe to examine the electron-lattice interaction. The systematic investigation of the electron-lattice interaction for the various electron systems, low carrier, heavy Fermion, low dimensional organic compounds is important. In particular the microscopic origin of the Copper pair and the enhanced Gruneisen constant are interesting subjects.(4)The Brillouin scattering experiment by Yoshihara is now possible to examine the magnon and phonon excitations in the low dimensional magnetic film, superlattice and various single crystals with f-electrons. The thermal expansion and the manetostriction are also important.

国际科学研究计划的标题为“紧密相关的电子系统的电子晶格相互作用”。 T. Goto教授和B.Luthi教授分别是日本和德国方面的首席调查员。日语侧面的外线如下。（1）由于F-电子系统的四极晶型相互作用以及F-电子化合物中的四极孔排序引起的四极响应仍然是有趣的问题。 ceru_2si_22和ce^xla_ <l-x> b_6的四极响应与昆多单线系统中的竞争之间的竞争与尿素化合物的G3基础上的四极孔效应的可能性非常重要。揭示了异常的磁相图。藤田的组发现了高TC超导体LA__ <2-x> sr_xcuo_4中弹性常数的特殊磁场依赖性。通过超声波方法研究了高TC，重型费米亚和有机超导体的电子静电相互作用的显微特征。（3）在低温下弹性常数的量子振荡，声学DHVA效应，是一种独特的探针，是一种独特的探针来检查电子局势相互作用。对各种电子系统，低载体，沉重的费米，低维有机化合物的电子晶格相互作用的系统研究很重要。尤其是铜对的微观起源和增强的Gruneisen常数是有趣的主题。（4）现在可以检查Yoshihara的Brillouin散射实验，可以检查低尺寸磁性膜，超级峰值，超级峰值和带有F-Electron的各种单晶的磁子和声子激发。热膨胀和MANETOSTRITICT也很重要。