75As nuclear magnetic resonance study of antiferromagnetic fluctuations in the normal state of LiFeAs

被引：49

作者：

Jeglic, P. ^{[1
]}

Potocnik, A. ^{[1
]}

Klanjsek, M. ^{[1
]}

Bobnar, M. ^{[1
]}

Jagodic, M. ^{[2
]}

Koch, K. ^{[3
]}

Rosner, H. ^{[3
]}

Margadonna, S. ^{[4
]}

Lv, B. ^{[5
,6
]}

Guloy, A. M. ^{[5
,6
]}

Arcon, D. ^{[1
,7
]}

机构：

[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[2] Inst Math Phys & Mech, Ljubljana 1000, Slovenia

[3] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[4] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[5] Univ Houston, Dept Chem, Houston, TX 77204 USA

[6] Univ Houston, TCSUH, Houston, TX 77204 USA

[7] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 14期

关键词：

NMR; SUPERCONDUCTOR; YBA2CU3O7; MODEL;

D O I：

10.1103/PhysRevB.81.140511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a detailed study of As-75 nuclear magnetic resonance Knight shift and spin-lattice relaxation rate in the normal state of stoichiometric polycrystalline LiFeAs. Our analysis of the Korringa relation suggests that LiFeAs exhibits strong antiferromagnetic fluctuations, if transferred hyperfine coupling is a dominant interaction between As-75 nuclei and Fe electronic spins, whereas for an on-site hyperfine coupling scenario, these are weaker, but still present to account for our experimental observations. Density-functional calculations of electric field gradient correctly reproduce the experimental values for both As-75 and Li-7 sites.

引用

页数：4

共 28 条

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