Chin. Phys. Lett.  2015, Vol. 32 Issue (5): 057401    DOI: 10.1088/0256-307X/32/5/057401
Magnetism in Quasi-One-Dimensional A2Cr3As3 (A=K,Rb) Superconductors
WU Xian-Xin1, LE Cong-Cong1, YUAN Jing1, FAN Heng1,2, HU Jiang-Ping1,2,3**
1Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2Collaborative Innovation Center of Quantum Matter, Beijing 100190
3Department of Physics, Purdue University, West Lafayette 47907, USA
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We predict that the recently discovered quasi-one-dimensional superconductors, A2Cr3As3 (A=K,Rb), possess strong frustrated magnetic fluctuations and are nearby a novel in-out co-planar magnetic ground state. The frustrated magnetism is very sensitive to the c-axis lattice constant and can thus be suppressed by increasing pressure. Our results qualitatively explain strong non-Fermi liquid behaviors observed in the normal state of the superconductors as the intertwining between the magnetism and superconductivity can create a large quantum critical region in quasi-one-dimensional systems and also suggest that the materials share similar phase diagrams and superconducting mechanism with other unconventional superconductors, such as cuprates and iron-based superconductors.

Received: 09 April 2015      Published: 01 June 2015
PACS:  74.70.-b (Superconducting materials other than cuprates)  
  74.25.Ha (Magnetic properties including vortex structures and related phenomena)  
  74.20.Pq (Electronic structure calculations)  
  74.20.Rp (Pairing symmetries (other than s-wave))  
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WU Xian-Xin, LE Cong-Cong, YUAN Jing et al  2015 Chin. Phys. Lett. 32 057401
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LE Cong-Cong
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HU Jiang-Ping

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