Raman spectra and dimensional effect on the charge density wave transition in GdTe3

Chen，Yani1,2,3,4; Wang，Peipei3; Wu，Minghui3; Ma，Jinlong1; Wen，Shihao1; Wu，Xuefeng3; Li，Gaomin3,4; Zhao，Yue3,4; Wang，Kedong3; Zhang，Liyuan3; Huang，Li3; Li，Wu1; Huang，Mingyuan3,4

2019-10-07

10.1063/1.5118870

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

The studies of the dimensional effect on the charge density wave (CDW) transition have attracted a lot of attention since the rise of 2D materials. In this paper, we synthesize high-quality single-crystal GdTe, a member of the layered rare-earth metal tritelluride family with CDW transitions, and systematically study the temperature-dependent Raman spectra of bulk and few-layer GdTe. Combining with first-principle calculations, the CDW and phonon Raman peaks are distinguished and characterized. We demonstrate that the CDW order can be enhanced in few-layer GdTe, and the CDW transition temperature increases from 377 K to 431 K as the thickness reduces from the bulk to 10 nm. We speculate that this enhancement of the CDW order in the GdTe thin layer is likely due to the chemical pressure release. Our studies demonstrate that the dimensionality provides a valuable tuning parameter for manipulating the CDW properties of GdTe.

SCI ; EI

英语

NI论文

其他

WOS:000492035500006

20194207547013

Gadolinium compounds ; Single crystals ; Charge density ; Rare earths ; Raman scattering ; Tellurium compounds

Electricity: Basic Concepts and Phenomena:701.1 ; Light/Optics:741.1 ; Inorganic Compounds:804.2 ; Crystalline Solids:933.1

PHYSICS

2-s2.0-85073189690

Scopus

1.Institute for Advanced Study,Shenzhen University,Shenzhen,518060,China
2.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Shenzhen Key Laboratory of Quantum Science and Engineering,Shenzhen,518055,China

Chen，Yani,Wang，Peipei,Wu，Minghui,et al. Raman spectra and dimensional effect on the charge density wave transition in GdTe3[J]. APPLIED PHYSICS LETTERS,2019,115(15).

Chen，Yani.,Wang，Peipei.,Wu，Minghui.,Ma，Jinlong.,Wen，Shihao.,...&Huang，Mingyuan.(2019).Raman spectra and dimensional effect on the charge density wave transition in GdTe3.APPLIED PHYSICS LETTERS,115(15).

Chen，Yani,et al."Raman spectra and dimensional effect on the charge density wave transition in GdTe3".APPLIED PHYSICS LETTERS 115.15(2019).