Thermal-transport study of spin excitations in quantum spin liquid state
| Project/Area Number |
22740224
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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 | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 磁性 / 低温動性 / 幾何学的フラストレーション / 低温物性 |
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| Research Abstract |
Quantum spin liquids(QSLs) are fluid-like states of quantum spins where its long-range ordered state is destroyed by quantum fluctuations. The ground state of QSL and its exotic phenomena, which have been extensively discussed for decades, have yet to be identified. We employ thermal transport measurements on newly discovered QSL candidates, and find a sizable linear temperature dependence of thermal conductivity in the zero-temperature limit, showing gapless excitation with a long mean free path(~ 1, 000 lattice distances). Such a long mean free path demonstrates a novel feature of QSL as a quantum-condensed state with long-distance coherence.
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Report
(3 results)
Research Products
(33 results)
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[Journal Article] Extremely strong coupling superconductivity in artificial two-dimensional Kondo lattices2011
Author(s)
Y. Mizukami, H. Shishido, T. Shibauchi, M. Shimozawa, S. Yasumoto, D. Watanabe, M. Yamashita, H. Ikeda, T. Terashima, H. Kontani, Y. Matsuda
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Related Report
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[Journal Article] Phys Nodal gap structure of superconducting BaFe2(As1. xPx) 2 from angle-resolved thermal conductivity in a magnetic field2011
Author(s)
M. Yamashita, Y. Senshu, T. Shibauchi, S. Kasahara, K. Hashimoto, D. Watanabe, H. Ikeda, T. Terashima, I. Vekhter, A. B. Vorontsov, and Y. Matsuda
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[Journal Article] Line nodes in the energy gap of superconducting BaFe2(As_1. xPx) 2 single crystals as seen via penetration depth and thermal conductivity2010
Author(s)
K. Hashimoto, M. Yamashita, S. Kasahara, Y. Senshu, N. Nakata, S. Tonegawa, K. Ikada, A. Serafin, A. Carrington, T. Terashima, H. Ikeda, T. Shibauchi, and Y. Matsuda
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