PHASE-TRANSITION AND ELECTRON LOCALIZATION IN 1T-TAS2

IMR OpenIR

	PHASE-TRANSITION AND ELECTRON LOCALIZATION IN 1T-TAS2
	S. Y. Dai; C. T. Yu; D. H. Li; Z. Y. Shen; S. Y. Fang
	1995
发表期刊	Physical Review B
ISSN	0163-1829
卷号	52 期号:3 页码:1578-1583
摘要	The magnetic properties and phase transitions of 1T-TaS2 and 1T-Fe0.07Ta0.93S2 have been studied in the interval of 1.5-300 K and over the range of 100 Oe-60 kOe. Experimental results show that at high temperatures the compounds are in a diamagnetic state and the commensurate-charge-density-wave-triclinic-nearly-commensurate transition temperature of 1T-TaS2 decreases with increasing magnetic field. The amount of variation is a function of the magnetic field. At low temperatures both 1T-TaS2 and 1T-Fe0.07Ta0.93S2 are in a paramagnetic state owing to the localized moments that come from the single Anderson-Mott localization state. The curves of magnetization versus temperature do not follow the Curie law or Curie-Weiss law, but can be described fairly well as M = M(0) + gamma T--n. The fitting parameters of experimental curves show that a part of the neighboring moment appears as antiferromagnetic coupling due to exchange interaction between the moments. The magnetic-field dependence of magnetization exhibits a complicated feature at low temperature. It shows that the compounds may undergo a phase transition at the maximum value of magnetization and then they are probably in a mixed charge-density-wave-spin-density-wave (CDW-SDW) state or SDW state due to the coherent superposition of the antiferromagnetic coupling.
部门归属	chinese acad sci, int ctr mat & phys, shenyang 110005, peoples r china. univ hunan, dept phys, changsha 410082, peoples r china.;dai, sy (reprint author), chinese acad sci, inst phys, beijing 100080, peoples r china, peoples r china
关键词	Metal-insulator-transition Density-wave Domains High Magnetic-fields Charge-density Doped 1t-tas2 Coexistence Microscopy Systems Silicon 2h-tas2
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38549
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Dai,C. T. Yu,D. H. Li,et al. PHASE-TRANSITION AND ELECTRON LOCALIZATION IN 1T-TAS2[J]. Physical Review B,1995,52(3):1578-1583.
APA	S. Y. Dai,C. T. Yu,D. H. Li,Z. Y. Shen,&S. Y. Fang.(1995).PHASE-TRANSITION AND ELECTRON LOCALIZATION IN 1T-TAS2.Physical Review B,52(3),1578-1583.
MLA	S. Y. Dai,et al."PHASE-TRANSITION AND ELECTRON LOCALIZATION IN 1T-TAS2".Physical Review B 52.3(1995):1578-1583.