Welcome to Nohara Lab.

Research Institute for Interdisciplinary Science, Okayama University

Research Highlight

Honeycomb network: A platform for chiral d-wave superconductivity

• "Superconductivity in Hexagonal BaPtAs: SrPtSb- and YPtAs-type Structures with Ordered Honeycomb Network," K. Kudo, T. Takeuchi, H. Ota, Y. Saito, S. Ayukawa, K. Fujimura, and M. Nohara, J. Phys. Soc. Jpn. 87, 073708 (2018).
• "Superconductivity in BaPtSb with an Ordered Honeycomb Network," K. Kudo, Y. Saito, T. Takeuchi, S. Ayukawa, T. Kawamata, S. Nakamura, Y. Koike, and M. Nohara, J. Phys. Soc. Jpn. 87, 063702 (2018).
• "Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs", Y. Nishikubo, K. Kudo, M. Nohara, J. Phys. Soc. Jpn. 80, 055002 (2011).

Two routes to strong-coupling superconductivity demonstrated

• "Composition-induced structural instability and strong-coupling superconductivity in Au_1-xPd_xTe₂," K. Kudo, H. Ishii, and M. Nohara, Phys. Rev. B 93, 140505(R) (2016).
• "Giant Phonon Softening and Enhancement of Superconductivity by Phosphorus Doping of BaNi₂As₂", K. Kudo, M. Takasuga, Y. Okamoto, Z. Hiroi, and M. Nohara, Phys. Rev. Lett. 109, 097002 (2012).

Novel 112-type iron-based superconductor (Ca,La)FeAs₂ discovered

• "Superconducting Transition Temperatures of up to 47 K from Simultaneous Rare-Earth Element and Antimony Doping of 112-Type CaFeAs₂," K. Kudo et al., J. Phys. Soc. Jpn. 83, 093705 (2014).
• "Enhanced Superconductivity up to 43 K by P/Sb Doping of Ca_1−xLa_xFeAs₂", K. Kudo et al., J. Phys. Soc. Jpn. 83, 025001 (2014).
• "Superconductivity in Ca_1-xLa_xFeAs₂: A Novel 112-Type Iron Pnictide with Arsenic Zigzag Bonds", N. Katayama et al., J. Phys. Soc. Jpn. 82, 123702 (2013).

The highest bulk T_c of 45 K in 122-type iron-based superconductor

• "Emergence of superconductivity at 45 K by lanthanum and phosphorus co-doping of CaFe₂As₂", K. Kudo et. al., Scientific Reports 3, 1478 (2013).

Superconductivity induced by breaking Ir dimers

• "Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe₂,"
  S. Pyon, K. Kudo, and M. Nohara, J. Phys. Soc. Jpn. 81, 053701 (2012).
  
• "Suppression of Structural Phase Transition in IrTe₂ by Isovalent Rh Doping",
  K. Kudo, M. Kobayashi, S. Pyon, M. Nohara, J. Phys. Soc. Jpn. 82, 085001 (2013).

Thermoelectric materials that convert waste heat to electricity

• "Enhancing high-temperature thermoelectric properties of PtAs₂ by Rh doping",
  K. Kudo et al. Applied Physics Letters 103, 092107-1-3 (2013).
• "Enhanced Thermoelectric Properties by Ir Doping of PtSb₂ with Pyrite Structure",
  Y. Nishikubo et al., Applied Physics Letters, 100, 252104 (2012).

Platinum-based superconductors

• "Coexistence of superconductivity and charge density wave in SrPt₂As₂",
  K. Kudo, Y. Nishikubo, M. Nohara, J. Phys. Soc. Jpn. 79, 123710 (2010).
• "Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs",
  Y. Nishikubo, K. Kudo, M. Nohara, J. Phys. Soc. Jpn. 80, 055002 (2011).

Fe-based superconductors with PtAs and IrAs intermediary layers

• "Superconductivity in Ca₁₀(Ir₄As₈)(Fe₂As₂)₅ with Square-Planar Coordination of Iridium", K. Kudo et al., Scientific Reports 3, 3101 (2013).
• "Superconductivity at 38 K in Iron-Based Compound with Platinum-Arsenide Layers Ca₁₀(Pt₄As₈)(Fe_2-xPt_xAs₂)₅", S. Kakiya et al., J. Phys. Soc. Jpn. 80, 093704 (2011).
  

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• Research Institute for Interdisciplinary Science
• Okayama University

Copyright Minoru Nohara,
Okayama University.
Since 2008