Numerical Study of Spectroscopic Properties in Low-Dimensional Strongly Correlated Electron Systems

低维强相关电子系统光谱特性的数值研究

• 批准号: 22340097
• 负责人: TOHYAMA Takami
• 金额: $ 12.4万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22340097/
• 关键词: 物性理論; 光物性; 密度行列繰り込み群法; 厳密対角化法; 低次元強相関電子系

We focus on spectroscopic properties of low-dimensional strongly correlated electron systems, which can detect dynamics of spin, charge, orbital, and lattice degrees of freedom, in order to make a progress on our understanding of various quantum phenomena appearing in the systems. We use numerical techniques such as exact diagonalization and dynamical density-matrix renormalization group. We find various spectroscopic properties in the systems, for example, photoexcitation the relaxation dynamics of Mott insulators coupled to phonon, spin dynamics in low-dimensional spin systems coupled to phonon, resonant inelastic x-ray scattering in itinerant antiferromagnets and cuprate superconductors, magnetic Raman scattering in organic systems with triangular lattice. The obtained results are published in many journals.

本文重点研究了低维强相关电子系统的光谱特性，该系统可以检测自旋、电荷、轨道和晶格自由度的动力学，以期在我们对系统中出现的各种量子现象的理解上取得进展。我们使用了精确对角化和动态密度矩阵重整化群等数值技术。我们在系统中发现了各种光谱特性，例如光激发与声子耦合的Mott绝缘体的弛豫动力学，与声子耦合的低维自旋系统的自旋动力学，流动反铁磁体和铜超导体中的共振非弹性x射线散射，具有三角形晶格的有机系统中的磁性拉曼散射。获得的结果发表在许多期刊上。

项目成果

Low-temperature density matrix renormalization group study on spin-1/2 frustrated spin chains

• DOI: 10.1088/1742-6596/200/1/012191
• 发表时间: 2010
• 期刊: Journal of Physics: Conference Series
• 作者: S. Sota;T. Tohyama

Spin and orbital characters of excitations in iron arsenide superconductors revealed by simulated resonant inelastic x-ray scattering

• DOI: 10.1103/physrevb.84.020511
• 发表时间: 2011-04
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: E. Kaneshita;K. Tsutsui;T. Tohyama

四半世紀を経た銅酸化物高温超伝導研究の現状

四分之一世纪后氧化铜高温超导研究现状

• 发表时间: 2011
• 期刊: 固体物理
• 作者: 永崎洋;遠山貴巳
• 通讯作者: 遠山貴巳

Chirality in spin- 1/2 zigzag XY chain : Low-temperature density-matrix renormalization group study

自旋 1/2 锯齿形 XY 链中的手性：低温密度矩阵重正化群研究

• DOI: 10.1103/physrevb.82.035437
• 发表时间: 2010
• 期刊: Phys. Rev. B
• 作者: T. Sugimoto;S. Sota;T. Tohyama
• 通讯作者: T. Tohyama

Electronic excitations in 3d transition-metal compounds revealed by simulated resonant inelastic x-ray scattering

通过模拟共振非弹性 X 射线散射揭示 3d 过渡金属化合物中的电子激发

• 发表时间: 2013
• 作者: S.Sota;T.Tohyama;松原隆彦;古本和哉;遠山貴巳;松原隆彦;藤秀樹;松原隆彦;T. Tohyama
• 通讯作者: T. Tohyama