Volume 120, Number 2, October 2017
|Number of page(s)||3|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||15 January 2018|
Superconductivity at 7.3 K in the 133-type Cr-based RbCr3As3 single crystals
1 Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - Beijing 100190, China
2 School of Physical Sciences, University of Chinese Academy of Sciences - Beijing 100049, China
3 Collaborative Innovation Center of Quantum Matter - Beijing 100190, China
Received: 8 November 2017
Accepted: 2 January 2018
Here we report the preparation and superconductivity of the 133-type Cr-based quasi–one-dimensional (Q1D) RbCr3As3 single crystals. The samples were prepared by the deintercalation of Rb+ ions from the 233-type Rb2Cr3As3 crystals which were grown from a high-temperature solution growth method. The RbCr3As3 compound crystallizes in a centrosymmetric structure with the space group P63/m (No. 176) different from its non-centrosymmetric Rb2Cr3As3 superconducting precursor, and the refined lattice parameters are and . Electrical resistivity and magnetic susceptibility characterizations reveal the occurrence of superconductivity with an interestingly higher onset Tc of 7.3 K than other Cr-based superconductors, and an estimated high upper critical field Hc2(0) about 72.4 T in this 133-type RbCr3As3 crystals.
PACS: 74.70.-b – Superconducting materials other than cuprates / 74.70.Xa – Pnictides and chalcogenides / 74.25.-q – Properties of superconductors
© EPLA, 2018
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