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DOI | 10.1126/science.aam6432 |
Signatures of exciton condensation in a transition metal dichalcogenide | |
Kogar, Anshul1,2; Rak, Melinda S.1,2; Vig, Sean1,2; Husain, Ali A.1,2; Flicker, Felix3; Il Joe, Young1,2; Venema, Luc1,2; MacDougall, Greg J.1,2; Chiang, Tai C.1,2; Fradkin, Eduardo1,2; van Wezel, Jasper4; Abbamonte, Peter1,2 | |
2017-12-08 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 358期号:6368页码:1315-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Netherlands |
英文摘要 | Bose condensation has shaped our understanding of macroscopic quantum phenomena, having been realized in superconductors, atomic gases, and liquid helium. Excitons are bosons that have been predicted to condense into either a superfluid or an insulating electronic crystal. Using the recently developed technique of momentum-resolved electron energy-loss spectroscopy (M-EELS), we studied electronic collective modes in the transition metal dichalcogenide semimetal 1T-TiSe2. Near the phase-transition temperature (190 kelvin), the energy of the electronic mode fell to zero at nonzero momentum, indicating dynamical slowing of plasma fluctuations and crystallization of the valence electrons into an exciton condensate. Our study provides compelling evidence for exciton condensation in a three-dimensional solid and establishes M-EELS as a versatile technique sensitive to valence band excitations in quantum materials. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417254700061 |
WOS关键词 | SEMIMETAL TISE2 ; STATE ; POLARITONS ; INSULATOR ; PHONONS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/197500 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Illinois, Dept Phys, Urbana, IL 61801 USA; 2.Univ Illinois, Seitz Mat Res Lab, Urbana, IL 61801 USA; 3.Univ Oxford, Rudolph Peierls Ctr Theoret Phys, Oxford OX1 3NP, England; 4.Univ Amsterdam, Inst Phys, NL-1098 XH Amsterdam, Netherlands |
推荐引用方式 GB/T 7714 | Kogar, Anshul,Rak, Melinda S.,Vig, Sean,et al. Signatures of exciton condensation in a transition metal dichalcogenide[J]. SCIENCE,2017,358(6368):1315-+. |
APA | Kogar, Anshul.,Rak, Melinda S..,Vig, Sean.,Husain, Ali A..,Flicker, Felix.,...&Abbamonte, Peter.(2017).Signatures of exciton condensation in a transition metal dichalcogenide.SCIENCE,358(6368),1315-+. |
MLA | Kogar, Anshul,et al."Signatures of exciton condensation in a transition metal dichalcogenide".SCIENCE 358.6368(2017):1315-+. |
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