Upper Critical Field and Kondo Effects in Fe(Te0.9Se0.1) Thin Films by Pulsed Field Measurements

被引：12
|
作者：
Salamon, Myron B. [1 ,3 ]
Cornell, Nicholas [2 ]
Jaime, Marcelo [3 ]
Balakirev, Fedor F. [3 ]
Zakhidov, Anvar [1 ]
Huang, Jijie [4 ]
Wang, Haiyan [4 ]
机构：
[1] Univ Texas Dallas, Dept Phys, Richardson, TX 75080 USA
[2] Naval Surface Warfare Ctr, Corona Div, Norco, CA 92860 USA
[3] Los Alamos Natl Lab, Natl High Magnet Field Lab, POB 1663, Los Alamos, NM 87545 USA
[4] Texas A&M Univ, Dept Mat Sci, College Stn, TX 77843 USA
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
美国国家科学基金会;
关键词：
SUPERCONDUCTIVITY; TEMPERATURE; MAGNETORESISTIVITY; STATE;
D O I：
10.1038/srep21469
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The transition temperatures of epitaxial films of Fe(Te0:9Se0:1) are remarkably insensitive to applied magnetic field, leading to predictions of upper critical fields B-c2(T = 0) in excess of 100 T. Using pulsed magnetic fields, we find B-c2(0) to be on the order of 45 T, similar to values in bulk material and still in excess of the paramagnetic limit. The same films show strong magnetoresistance in fields above B-c2(T), consistent with the observed Kondo minimum seen above T-c. Fits to the temperature dependence in the context of the WHH model, using the experimental value of the Maki parameter, require an effective spin-orbit relaxation parameter of order unity. We suggest that Kondo localization plays a similar role to spin-orbit pair breaking in making WHH fits to the data.
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页数：6
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