Unconventional superconducting phase in the weakly correlated noncentrosymmetric Mo(3)Al(2)C compound

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	Unconventional superconducting phase in the weakly correlated noncentrosymmetric Mo(3)Al(2)C compound
	E. Bauer; G. Rogl; X. Q. Chen; R. T. Khan; H. Michor; G. Hilscher; E. Royanian; K. Kumagai; D. Z. Li; Y. Y. Li; R. Podloucky; P. Rogl
	2010
发表期刊	Physical Review B
ISSN	1098-0121
卷号	82 期号:6
摘要	Electrical resistivity, specific-heat, and NMR measurements classify noncentrosymmetric Mo(3)Al(2)C (beta-Mn type, space group P4(1)32) as a strong-coupled superconductor with T(c)=9 K deviating notably from BCS-type behavior. The absence of a Hebbel-Slichter peak, a power-law behavior of the spin-lattice relaxation rate (from (27)Al NMR), an electronic specific heat strongly deviating from BCS model and a pressure enhanced T(c) suggest unconventional superconductivity with possibly a nodal structure of the superconducting gap. Relativistic density-functional theory calculations reveal a splitting of degenerate electronic bands due to the asymmetric spin-orbit coupling, favoring a mix of spin-singlet and spin-triplet components in the superconducting condensate, in absence of strong correlations among electrons.
部门归属	[bauer, e.; khan, r. t.; michor, h.; hilscher, g.; royanian, e.] vienna univ technol, inst solid state phys, a-1040 vienna, austria. [rogl, g.; podloucky, r.; rogl, p.] univ vienna, inst phys chem, a-1090 vienna, austria. [chen, xing-qiu; li, d. z.; li, y. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang, peoples r china. [kumagai, k.] hokkaido univ, grad sch sci, div phys, sapporo, hokkaido 0600810, japan.;bauer, e (reprint author), vienna univ technol, inst solid state phys, a-1040 vienna, austria
关键词	Inversion Symmetry Temperature Field Spin
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31011
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. Bauer,G. Rogl,X. Q. Chen,et al. Unconventional superconducting phase in the weakly correlated noncentrosymmetric Mo(3)Al(2)C compound[J]. Physical Review B,2010,82(6).
APA	E. Bauer.,G. Rogl.,X. Q. Chen.,R. T. Khan.,H. Michor.,...&P. Rogl.(2010).Unconventional superconducting phase in the weakly correlated noncentrosymmetric Mo(3)Al(2)C compound.Physical Review B,82(6).
MLA	E. Bauer,et al."Unconventional superconducting phase in the weakly correlated noncentrosymmetric Mo(3)Al(2)C compound".Physical Review B 82.6(2010).