Seebeck and Nernst effects in the mixed state of strongly fluctuating superconductors

被引：0
作者：
Nguyen, Luu Huu [1 ,2 ]
Vi, Tran Ky [3 ]
Tinh, Bui Duc [4 ]
机构：
[1] Van Lang Univ, Sci & Technol Adv Inst, Lab Magnetism & Magnet Mat, Ho Chi Minh City, Vietnam
[2] Van Lang Univ, Fac Appl Technol, Sch Technol, Ho Chi Minh City, Vietnam
[3] Dai Nam Univ, Fac Semicond Technol, Phu Lam Ward, 1 Xom St, Hanoi, Vietnam
[4] Hanoi Natl Univ Educ, Fac Phys, 136 Xuan Thuy, Hanoi, Vietnam
来源：
PHYSICA B-CONDENSED MATTER | 2024年 / 695卷
关键词：
Seebeck and Nernst effects; Strongly fluctuating superconductors; Fe-based superconductor; Ginzburg-Landau Lawrence-Doniach model;
D O I：
10.1016/j.physb.2024.416549
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study Seebeck and Nernst effects in strongly fluctuating superconductors by calculating the Seebeck and Nernst coefficients in the Ginzburg-Landau Lawrence-Doniach model with thermal noise. Strongly thermal fluctuations are represented by the Langevin thermal noise. To capture the interesting fluctuation effects, we use the self-consistent Gaussian approximation to treat cubic term in the equation of motion. Our results including all Landau levels are to treat arbitrary magnetic fields. The Seebeck and Nernst coefficients are calculated for arbitrary temperature and magnetic field. The results are compared to experimental data on Fe-based superconductor Fe 1+ y Te 0.6 Se 0.4 in both the superconducting state below the critical temperature Tc c and the normal state above Tc. c . Our calculation supports the picture of phase disordering of fluctuations above Tc c in Fe-based superconductors.
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页数：5
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