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题名: Penetration depth study of LaOs4Sb12: Multiband s-wave superconductivity
作者: Tee, XY ;  Luo, HG ;  Xiang, T ;  Vandervelde, D ;  Salamon, MB ;  Sugawara, H ;  Sato, H ;  Panagopoulos, C ;  Chia, EEM
刊名: PHYSICAL REVIEW B
出版日期: 2012
卷号: 86, 期号:6, 页码:64518
关键词: FIELD ;  SYMMETRY ;  ORDER ;  HEAT
学科分类: Physics
通讯作者: Tee, XY (reprint author), Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore.
部门归属: [Tee, X. Y.; Panagopoulos, C.; Chia, Elbert E. M.] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore; [Luo, H. G.] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China; [Luo, H. G.] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MoE, Lanzhou 730000, Peoples R China; [Luo, H. G.] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China; [Xiang, T.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; [Xiang, T.] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Vandervelde, D.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA; [Salamon, M. B.] Univ Texas Dallas, Dept Phys, Richardson, TX 75080 USA; [Sugawara, H.] Univ Tokushima, Fac Integrated Arts & Sci, Tokushima 7708502, Japan; [Sato, H.] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan
英文摘要: We measured the magnetic penetration depth lambda(T) in single crystals of LaOs4Sb12 (T-c = 0.74 K) down to 85 mK using a tunnel-diode-oscillator technique. The observed low-temperature exponential dependence indicates an s-wave gap. Fitting the low-temperature data to a BCS s-wave expression gives the zero-temperature gap value Delta(0) = (1.34 +/- 0.07)k(B)T(c) which is significantly smaller than the BCS value of 1.76k(B)T(c). In addition, the normalized superfluid density rho(T) shows an unusually long suppression near T-c and is best fit by a two-band s-wave model.
资助者: NSF [DMR99-72087, DMR01-07253]; US Department of Energy [DEFG02-91-ER45439]; National Research Foundation of Singapore; NSFC [10934008, 10874215, 11174115]; MOST 973 Project of China [2011CB309703]; Ministry of Education, Culture, Sports, Science, and Technology, Japan [21102503]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000307719100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15045
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Tee, XY,Luo, HG,Xiang, T,et al. Penetration depth study of LaOs4Sb12: Multiband s-wave superconductivity[J]. PHYSICAL REVIEW B,2012,86(6):64518.
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