Novel transport phenomena in spin-triplet superconductor
| Project/Area Number |
21740276
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Shinshu University (2010)
National Institute of Advanced Industrial Science and Technology (2009) |
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Principal Investigator |
KAMBARA Hiroshi Shinshu University, 教育学部, 助教 (00313198)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 強相関系 / スピン3重項超伝導 / ルテニウム酸化物 / カイラルp波超伝導 / Sr_2RuO_4 / トンネルスペクトル / ブレークジャンクション / スピン2重項超伝導 / Sr_2RuO_4-Ru共晶系 / 超伝導接合 / カイラルドメイン |
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| Research Abstract |
Using micro fabrication techniques, we investigated local transport characteristics of spin-triplet p-wave superconductor Sr_2RuO_4 (SRO). We observed novel phenomena such as, (i) an unconventional hysteresis in voltage-current characteristics in a few μm-width weak junction, and (ii) a large enhancement of superconducting critical current density with reducing cross section below 100m^2. These phenomena imply that edge states are formed in a microfabricated SRO device. We also studied tunnel spectra of an SRO break junction formed by microfabrication. The tunnel spectra showed broad zero-bias conductance peaks, which supports the chiral p-wave state in SRO.
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Report
(3 results)
Research Products
(16 results)
