µSR Investigation of Doped IrTe2
Murray WilsonJiaqiang Yan, David Mandrus, Timothy Munsie, Teresa Medina, Graeme Luke
Outline
• Motivation
• µSR Introduction
• Ir0.95Pt0.05Te2 TF µSR
• Fe0.33Ir0.83Te2 ZF µSR
• Conclusion
IrTe
1/15
Motivation – IrTe2
P3m 1
Layered structure
High spin-orbit coupling
Structural transition
Matsumoto JLTP 1999
2/15
Motivation
Yang PRL 108 116402 (2012)
Yan arXiv:1309.4829v1
Feng Sci. Rep. 3 1153 2013
µSR Technique
3/15 J.E. Sonier Muon Spin Rotation/Relaxation/Resonance (µSR)
µSR Technique
4/15
µSR Technique
5/15
Ir0.95Pt0.05Te2
B = 300 G
TF µSR
6/15
Pt-IrTe2
𝑛𝑠=𝑚𝜎𝑆𝐶
0.043𝜇0𝑒2𝛾𝜇𝛷0√2
𝜎 𝑆𝐶=√𝜎 2−𝜎𝑁2
Superfluid Density
7/15
Pt-IrTe2
𝑛𝑠=𝑚
𝜇0 𝜆02𝑒2¿
∆ (𝑇 )=∆0 tanh (1.837(𝑇 𝐶
𝑇 −1)0.51
)
Superfluid Density
8/15
Pt-IrTe2
Superfluid Density
9/15
Pt-IrTe2
Ir0.95Pt0.05Te2Present Work
Ir0.95Pd0.05Te2Ref. [1] (STS)
BCS weak coupling
meV meV
[1] D.J. Yu et. al PRB 89, 100501(R) March 4 2014
BCS Comparison
10/15
Fe0.33Ir0.83Te2Single Crystal
ZF µSR
11/15
Fe-IrTe2
ZF µSR
12/15
Fe-IrTe2
ZF µSR
13/15
Spin Glass TC ≈ 10K
Fe-IrTe2
ZF µSR
14/15
Fe-IrTe2
J.-Q. Yan et al. arXiv:1309.4829v1 [cond-mat.supr-con] 19-09-2013
Fe-IrTe2 spin glass, TC ≈ 10K
Pt-IrTe2 weak coupling fully gapped BCS superconductor, TC = 2.24K
15/15
Conclusions
Acknowledgments
Timothy MunsieAlannah HallasTeresa MedinaDr. Graeme Luke
Lian LiuBenjamin FrandsenDr. Yasutomo Uemura
Dr. Bassam HittiDr. Gerald Morris
Dr. Jiaqiang YanDr. David Mandrus