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    Impact of uniaxial pressure on structural and magnetic phase transitions in electron-doped iron pnictides

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    Author
    Lu, Xingye
    Tseng, Kuo-Feng
    Keller, T.
    Zhang, Wenliang
    Hu, Ding
    Song, Yu
    Man, Haoran
    Park, J.T.
    Luo, Huiqian
    Li, Shiliang
    Nevidomskyy, Andriy H.
    Dai, Pengcheng
    Date
    2016
    Citation
    Lu, Xingye, Tseng, Kuo-Feng, Keller, T., et al.. "Impact of uniaxial pressure on structural and magnetic phase transitions in electron-doped iron pnictides." Physical Review B, 93, no. 13 (2016) http://dx.doi.org/10.1103/PhysRevB.93.134519.
    Published Version
    http://dx.doi.org/10.1103/PhysRevB.93.134519
    Abstract
    We use neutron resonance spin echo and Larmor diffraction to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (Ts) and antiferromagnetic (AF) phase transitions in iron pnictides BaFe2−xNixAs2 (x=0,0.03,0.12),SrFe1.97Ni0.03As2, and BaFe2(As0.7P0.3)2. In antiferromagnetically ordered BaFe2−xNixAs2 and SrFe1.97Ni0.03As2 with TN and Ts (TN≤Ts), a uniaxial pressure necessary to detwin the sample also increases TN, smears out the structural transition, and induces an orthorhombic lattice distortion at all temperatures. By comparing temperature and doping dependence of the pressure induced lattice parameter changes with the elastoresistance and nematic susceptibility obtained from transport and ultrasonic measurements, we conclude that the in-plane resistivity anisotropy found in the paramagnetic state of electron underdoped iron pnictides depends sensitively on the nature of the magnetic phase transition and a strong coupling between the uniaxial pressure induced lattice distortion and electronic nematic susceptibility.
    Type
    Journal article
    Citable link to this page
    http://hdl.handle.net/1911/90579
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    • Faculty Publications [3507]
    • Physics and Astronomy Publications [1325]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892