Electronic properties of single-crystalline Fe1.05Te and Fe1.03Se0.30Te0.70

被引：184

作者：

Chen, G. F. ^{[1
]}

Chen, Z. G. ^{[1
]}

Dong, J. ^{[1
]}

Hu, W. Z. ^{[1
]}

Li, G. ^{[1
]}

Zhang, X. D. ^{[1
]}

Zheng, P. ^{[1
]}

Luo, J. L. ^{[1
]}

Wang, N. L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 14期

关键词：

impurity scattering; iron compounds; magnetic susceptibility; selenium compounds; specific heat; superconducting critical field; superconducting energy gap; superconducting materials; superconducting transition temperature; superconducting transitions; SUPERCONDUCTIVITY; SPIN;

D O I：

10.1103/PhysRevB.79.140509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on a comprehensive study of the transport, specific heat, magnetic susceptibility, and optical spectroscopy on single crystal of Fe1.05Te, which undergoes a first-order phase transition near 65 K. We show that its physical properties are considerably different from other parent compounds of FeAs-based systems, presumably attributed to the presence of excess Fe ions. The charge transport is rather incoherent above the transition, and no clear signature of the gap is observed below the transition temperature. Strong impurity scattering effect exists also in Se-doped superconducting sample Fe1.03Se0.30Te0.70, leading to a relatively low T-c but a rather high upper critical field.

引用

页数：4

共 23 条

[1]

BAO W, ARXIV08092058

[2] Superconducting properties of the Fe-based layered superconductor LaFeAsO0.9F0.1-δ [J].

Chen, G. F. ;

Li, Z. ;

Li, G. ;

Zhou, J. ;

Wu, D. ;

Dong, J. ;

Hu, W. Z. ;

Zheng, P. ;

Chen, Z. J. ;

Yuan, H. Q. ;

Singleton, J. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 101 (05)

[3] Transport and anisotropy in single-crystalline SrFe2As2 and A0.6K0.4Fe2As2 (A=Sr, Ba) superconductors [J].

Chen, G. F. ;

Li, Z. ;

Dong, J. ;

Li, G. ;

Hu, W. Z. ;

Zhang, X. D. ;

Song, X. H. ;

Zheng, P. ;

Wang, N. L. ;

Luo, J. L. .

PHYSICAL REVIEW B, 2008, 78 (22)

[4] Competing orders and spin-density-wave instability in La(O1-xFx) FeAs [J].

Dong, J. ;

Zhang, H. J. ;

Xu, G. ;

Li, Z. ;

Li, G. ;

Hu, W. Z. ;

Wu, D. ;

Chen, G. F. ;

Dai, X. ;

Luo, J. L. ;

Fang, Z. ;

Wang, N. L. .

EPL, 2008, 83 (02)

[5]

FANG C, ARXIV08111294

[6] Theory of electron nematic order in LaFeAsO [J].

Fang, Chen ;

Yao, Hong ;

Tsai, Wei-Feng ;

Hu, JiangPing ;

Kivelson, Steven A. .

PHYSICAL REVIEW B, 2008, 77 (22)

[7] Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82 [J].

Fang, M. H. ;

Pham, H. M. ;

Qian, B. ;

Liu, T. J. ;

Vehstedt, E. K. ;

Liu, Y. ;

Spinu, L. ;

Mao, Z. Q. .

PHYSICAL REVIEW B, 2008, 78 (22)

[8] ANTIFERROMAGNETIC STRUCTURE OF FE1.125TE FOLLOWING A MONOCLINIC DEFORMATION [J].

FRUCHART, D ;

CONVERT, P ;

WOLFERS, P ;

MADAR, R ;

SENATEUR, JP ;

FRUCHART, R .

MATERIALS RESEARCH BULLETIN, 1975, 10 (03) :169-174

[9] Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering [J].

Gurevich, A ;

Patnaik, S ;

Braccini, V ;

Kim, KH ;

Mielke, C ;

Song, X ;

Cooley, LD ;

Bu, SD ;

Kim, DM ;

Choi, JH ;

Belenky, LJ ;

Giencke, J ;

Lee, MK ;

Tian, W ;

Pan, XQ ;

Siri, A ;

Hellstrom, EE ;

Eom, CB ;

Larbalestier, DC .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (02) :278-286

[10] TECHNIQUE FOR MEASURING THE REFLECTANCE OF IRREGULAR, SUBMILLIMETER-SIZED SAMPLES [J].

HOMES, CC ;

REEDYK, M ;

CRADLES, DA ;

TIMUSK, T .

APPLIED OPTICS, 1993, 32 (16) :2976-2983

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