Quantum Criticality Between Metal and Charge Order

金属与电荷序之间的量子临界

• 批准号: 204566485
• 负责人: Professor Dr. Martin Dressel
• 金额: --
• 依托单位: Zagreb Institute of Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/204566485?language=en
• 关键词: Quantum; Criticality; Between; Metal; Charge

Quantum critical points can occur at the edge of charge order. There quantum fluctuations associated with charge rather than magnetic order induce unconventional metallic properties. We want to investigate the transport properties, i.e. dc resistivity and Hall effect, of two-dimensional organic conductors in the vicinity of charge order to see how the coherence scale Tcoh characteristic of Fermi liquid behavior of the homogeneous metal vanishes at the onset of charge order. It is predicted that a strong effective mass enhancement reminiscent of heavy fermion behavior indicates the possible destruction of quasiparticles at the quantum-critical points.

量子临界点可以出现在电荷序的边缘。在那里，与电荷而不是磁序相关的量子涨落诱发了非常规的金属性质。我们想研究二维有机导体在电荷序附近的输运性质，即直流电阻率和霍尔效应，以了解均匀金属费米液体行为的相干尺度Tcoh特性如何在电荷序开始时消失。据预测，一个强大的有效质量增强联想到重费米子的行为表明可能的准粒子在量子临界点的破坏。

项目成果

Electrically induced phase transition in α -(BEDT-TTF) 2 I 3 : Indications for Dirac-like hot charge carriers

α -(BEDT-TTF) 2 I 3 中的电致相变：类狄拉克热载流子的适应症

• DOI: 10.1103/physrevb.93.245133
• 发表时间: 2016
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: T. Peterseim;T. Ivek;D. Schweitzer;M. Dressel
• 通讯作者: M. Dressel

Pressure-dependent optical investigations of α -(BEDT-TTF) 2 I 3 : Tuning charge order and narrow gap towards a Dirac semimetal

α -(BEDT-TTF) 2 I 3 的压力相关光学研究：调整电荷顺序和窄带隙朝向狄拉克半金属

• DOI: 10.1103/physrevb.93.195116
• 发表时间: 2016
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: R. Beyer;A. Dengl;T. Peterseim;S. Wackerow;T. Ivek;A.V. Pronin;D. Schweitzer;M. Dressel
• 通讯作者: M. Dressel

Pressure dependence of the metal-insulator transition in κ-(BEDT-TTF)2Hg(SCN)2Cl: optical and transport studies

δ-(BEDT-TTF)2Hg(SCN)2Cl 中金属-绝缘体转变的压力依赖性：光学和传输研究

• DOI: 10.1088/1361-648x/29/5/055601
• 发表时间: 2017
• 期刊: Journal of Physics: Condensed Matter
• 作者: A. Löhle;E. Rose;S. Singh;R. Beyer;E. Tafra;T. Ivek;S.A. Turunova;E.I. Zhilyaeva;R.N. Lyubovskaya;M. Dressel
• 通讯作者: M. Dressel

Semimetallic and charge-ordered α-(BEDT-TTF)2I3: On the role of disorder in dc transport and dielectric properties

半金属和电荷有序 α-(BEDT-TTF)2I3：论无序在直流输运和介电性能中的作用

• DOI: 10.1103/physrevb.96.075141
• 发表时间: 2017
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: T. Ivek;M. Culo;M. Kuvezdic;B. Korin-Hamzic;E. Tutis;M. Basletic;B. Mihaljevic;E. Tafra;A. Löhle;M. Dressel;D. Schweitzer;S. Tomic
• 通讯作者: S. Tomic