| Title: |
Fluctuation Diamagnetism in Two-Band Superconductors |
| Authors: |
Adachi, Kyosuke, Ikeda, Ryusuke |
| Source: |
Physical Review B 93, 134503 (2016) |
| Publication Year: |
2016 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Superconductivity |
| More Details: |
Anomalously large fluctuation diamagnetism around the superconducting critical temperature has been recently observed on iron selenide (FeSe) [S. Kasahara et al., unpublished]. This indicates that superconducting fluctuations (SCFs) play a more significant role in FeSe, which supposedly has two-band structure, than in the familiar single-band superconductors. Motivated by the data in FeSe, SCF-induced diamagnetism is examined in a two-band system, on the basis of a phenomenological approach with a Ginzburg-Landau functional. The obtained results indicate that the SCF-induced diamagnetism may be more enhanced than that in a single-band system due to the existence of two distinct fluctuation modes. Such enhancement of diamagnetism unique to a two-band system seems consistent with the large diamagnetism observed on FeSe, though still far from a quantitative agreement.
Comment: 17 pages, 6 figures |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevB.93.134503 |
| Access URL: |
http://arxiv.org/abs/1604.02211 |
| Accession Number: |
edsarx.1604.02211 |
| Database: |
arXiv |
