Nonexponential London penetration depth of external magnetic fields in superconducting Ba1-xKxFe2As2 single crystals
文献类型：期刊论文
| 作者 | Martin, C ; Gordon, RT ; Tanatar, MA ; Kim, H ; Ni, N ; Bud'ko, SL ; Canfield, PC ; Luo, H ; Wen, HH ; Wang, Z ; Vorontsov, AB ; Kogan, VG ; Prozorov, R |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2009 |
| 卷号 | 80期号:2 |
| 关键词 | GAPS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Prozorov, R (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. |
| 中文摘要 | We have studied the in- and out-of-plane magnetic penetration depths in the hole-doped iron-based superconductor Ba1-xKxFe2As2 (T-c approximate to 30 K). Single crystals grown from different fluxes and by different groups showed nearly identical results. The in-plane London penetration depth lambda(ab) is not exponentially saturating at low temperature, as would be expected from a fully gapped superconductor. Instead, lambda(ab)(T) shows a power-law behavior, lambda proportional to T-n (n approximate to 2), down to T approximate to 0.02T(c), similar to the electron-doped Ba(Fe1-xCox)(2)As-2. The penetration depth anisotropy gamma(lambda)=lambda(c)(T)/lambda(ab)(T) increases upon cooling, opposite to the trend observed in the anisotropy of the upper critical field, gamma(xi)=H-c2(perpendicular to c)(0)/H-c2(c)(0). These are universal characteristics of both the electron- and hole-doped 122 systems, suggesting unconventional multigap superconductivity. The behavior of the in-plane superfluid density rho(ab)(T) is discussed in light of existing theoretical models proposed for the iron pnictide superconductors. |
| 收录类别 | SCI |
| 资助信息 | Department of Energy, Basic Energy Sciences [DE-AC0207CH11358] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/49954]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Martin, C,Gordon, RT,Tanatar, MA,et al. Nonexponential London penetration depth of external magnetic fields in superconducting Ba1-xKxFe2As2 single crystals[J]. PHYSICAL REVIEW B,2009,80(2). |
| APA | Martin, C.,Gordon, RT.,Tanatar, MA.,Kim, H.,Ni, N.,...&Prozorov, R.(2009).Nonexponential London penetration depth of external magnetic fields in superconducting Ba1-xKxFe2As2 single crystals.PHYSICAL REVIEW B,80(2). |
| MLA | Martin, C,et al."Nonexponential London penetration depth of external magnetic fields in superconducting Ba1-xKxFe2As2 single crystals".PHYSICAL REVIEW B 80.2(2009). |
入库方式： OAI收割
来源：物理研究所
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