Anisotropic electrical conductivity, phase transition and thermal hysteresis of a charge-transfer salt dibutylammonium bis-7, 7, 8, 8-tetracyanoquinodimethane DBA(TCNQ)(2)

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	Anisotropic electrical conductivity, phase transition and thermal hysteresis of a charge-transfer salt dibutylammonium bis-7, 7, 8, 8-tetracyanoquinodimethane DBA(TCNQ)(2)
	Long, YZ ; Chen, ZJ ; Peng, HL ; Liu, ZF
刊名	CHINESE PHYSICS B
	2008
卷号	17 期号:6 页码:2251
关键词	TRANSFER-COMPLEX ORGANIC CONDUCTORS LOW-TEMPERATURE THIN-FILMS TCNQ FIELD TTF MECHANISM
ISSN号	1674-1056
通讯作者	Long, YZ: Qingdao Univ, Coll Phys Sci, Qingdao 266071, Peoples R China.
中文摘要	Low-temperature specific heat in a dichalcogenide superconductor 2H-NbSe2 is measured in various magnetic fields. It is found that the specific heat can be described very well by a simple model concerning two components corresponding to vortex normal core and ambient superconducting region, separately. For calculating the specific heat outside the vortex core region, we use the Bardeen-Cooper-Schrieffer (BCS) formalism under the assumption of a narrow distribution of the superconducting gaps. The field-dependent vortex core size in the mixed state of 2H-NbSe2, determined by using this model, can explain the nonlinear field dependence of specific heat coefficient gamma(H), which is in good agreement with the previous experimental results and more formal calculations. With the high-temperature specific heat data, we can find that, in the multi-band superconductor 2H-NbSe2, the recovered density of states (or Fermi surface) below T-c under a magnetic field seems not to be gapped again by the charge density wave (CDW) gap, which suggests that the superconducting gap and the CDW gap may open on different Fermi surface sheets.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33769]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Long, YZ,Chen, ZJ,Peng, HL,et al. Anisotropic electrical conductivity, phase transition and thermal hysteresis of a charge-transfer salt dibutylammonium bis-7, 7, 8, 8-tetracyanoquinodimethane DBA(TCNQ)(2)[J]. CHINESE PHYSICS B,2008,17(6):2251.
APA	Long, YZ,Chen, ZJ,Peng, HL,&Liu, ZF.(2008).Anisotropic electrical conductivity, phase transition and thermal hysteresis of a charge-transfer salt dibutylammonium bis-7, 7, 8, 8-tetracyanoquinodimethane DBA(TCNQ)(2).CHINESE PHYSICS B,17(6),2251.
MLA	Long, YZ,et al."Anisotropic electrical conductivity, phase transition and thermal hysteresis of a charge-transfer salt dibutylammonium bis-7, 7, 8, 8-tetracyanoquinodimethane DBA(TCNQ)(2)".CHINESE PHYSICS B 17.6(2008):2251.