Lattice distortion and magnetic quantum phase transition in CeFeAs(1-x)P(x)O.
نویسندگان
چکیده
We use neutron diffraction to study the structural and magnetic phase diagram of CeFeAs(1-x)P(x)O. We find that replacing the larger arsenic with smaller phosphorus in CeFeAs(1-x)P(x)O simultaneously suppresses the AFM order and orthorhombic distortion near x=0.4, thus suggesting the presence of a magnetic quantum critical point. Our detailed structural analysis reveals that the pnictogen height is an important controlling parameter for their electronic and magnetic properties, and may play an important role in electron pairing and superconductivity of these materials.
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عنوان ژورنال:
- Physical review letters
دوره 104 1 شماره
صفحات -
تاریخ انتشار 2010