Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure

doi:10.1088/1361-648X/ab315e

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure
	An, C ; Chen, XL ; Zhou, YH ; Zhou, Y ; Zhang, BW ; Chen, CH ; Yuan, YF ; Zhang, RR ; Zhang, LL ; Zhu, XD
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2019
卷号	31 期号:41 页码:-
关键词	MONOLAYER STRAIN
ISSN号	0953-8984
DOI	10.1088/1361-648X/ab315e
文献子类	期刊论文
英文摘要	We present a high-pressure study of type-II Dirac semimetal PtSe2 single crystals through synchrotron x-ray diffraction (XRD), electrical transport and Raman scattering measurements in diamond anvil cells with pressures up to 36.1-42.3 GPa, from which two critical pressure points associated with unusual electron-phonon coupling are unraveled. We show that both resistance and phonon linewidth of Raman modes display anomalies at the first critical pressure of P-r similar to 10GPa, in accordance with a scenario of pressure-induced disappearance/appearance of type-II/type-I Dirac points around P-r predicted previously. The second critical pressure P-c similar to 20 GPa may correspond to a structural crossover of PtSe2 from quasi-2D lattice to 3D network, which is revealed via detailed analysis of the structural parameters extracted from XRD refinement, Raman modes shifts as well as parameters from fitting of the low-temperature resistance. Our results demonstrate great tunability of PtSe2 via strain engineering, thanks to the single p-orbital manifold derived electronic states that are susceptible to out-of-plane and in-plane distances.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32222]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China; 2.Anhui Univ, Inst Phys Sci, Hefei 230601, Anhui, Peoples R China; 3.Anhui Univ, Inst Informat Technol, Hefei 230601, Anhui, Peoples R China; 4.Anhui Univ, Minist Educ, Key Lab Struct & Funct Regulat Hybrid Mat, Hefei 230601, Anhui, Peoples R China; 5.Chinese Acad Sci, High Magnet Field Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China; 6.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	An, C,Chen, XL,Zhou, YH,et al. Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2019,31(41):-.
APA	An, C.,Chen, XL.,Zhou, YH.,Zhou, Y.,Zhang, BW.,...&Yang, ZR.(2019).Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure.JOURNAL OF PHYSICS-CONDENSED MATTER,31(41),-.
MLA	An, C,et al."Structural, vibrational and electrical properties of type-II Dirac semimetal PtSe2 under high pressure".JOURNAL OF PHYSICS-CONDENSED MATTER 31.41(2019):-.