Scott C Riggs et al 2009 J. Phys.: Condens. Matter 21 412201 doi:10.1088/0953-8984/21/41/412201
Doping dependent nonlinear Hall effect in SmFeAsO1−xFx
FREE ARTICLEScott C Riggs1, R D McDonald2, J B Kemper1, Z Stegen1, G S Boebinger1, F F Balakirev2, Y Kohama2, A Migliori2, H Chen3, R H Liu3 and X H Chen3
Show affiliationsFAST TRACK COMMUNICATION
We report the Hall resistivity, ρxy, of polycrystalline SmFeAsO1−xFx for four different fluorine concentrations from the onset of superconductivity through the collapse of the structural phase transition. For the two more highly doped samples, ρxy is linear in magnetic field up to 50 T with only weak temperature dependence, reminiscent of a simple Fermi liquid. For the lightly doped samples with x<0.15, we find a low temperature regime characterized as ρxy(H) being both nonlinear in magnetic field and strongly temperature-dependent even though the Hall angle is small. The onset temperature for this nonlinear regime is in the vicinity of the structural phase (SPT)/magnetic ordering (MO) transitions. The temperature dependence of the Hall resistivity is consistent with a thermal activation of carriers across an energy gap. The evolution of the energy gap with doping is reported.
- PACS
-
74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
- Subjects
- Dates
-
Issue 41 (14 October 2009)
Received 20 May 2009, in final form 5 August 2009
Published 24 September 2009
-
Doping dependent nonlinear Hall effect in SmFeAsO1−xFx
Scott C Riggs et al 2009 J. Phys.: Condens. Matter 21 412201
-
Non-mean-field screening by multivalent counterions
M S Loth and B I Shklovskii 2009 J. Phys.: Condens. Matter 21 424104
-
Flexible relaxor materials: Ba2PrxNd1−xFeNb4O15 tetragonal tungsten bronze solid solution
Elias Castel et al 2009 J. Phys.: Condens. Matter 21 452201
-
Bulk flows in Virasoro minimal models with boundaries
Stefan Fredenhagen et al 2009 J. Phys. A: Math. Theor. 42 495403
-
Morphology and intermolecular dynamics of 1-alkyl-3-methylimidazolium bis{(trifluoromethane)sulfonyl}amide ionic liquids: structural and dynamic evidence of nanoscale segregation
Olga Russina et al 2009 J. Phys.: Condens. Matter 21 424121
-
Direct observation of double-k lattice modulation in double-k magnetic structures. The case of CeAl2
A Stunault et al 2009 J. Phys.: Condens. Matter 21 376004
-
Full counting statistics for noninteracting fermions: joint probability distributions
L Inhester and K Schönhammer 2009 J. Phys.: Condens. Matter 21 474209
-
Structure determination of Bi/Ge(111)-
by dynamical low-energy electron diffraction analysis and scanning tunneling microscopy
Yoshiyuki Ohtsubo et al 2009 J. Phys.: Condens. Matter 21 405001
-
Micro-fluidic channel fabrication via two-photon absorption (TPA) polymerization assisted ablation
S Jariwala et al 2009 J. Micromech. Microeng. 19 115023
-
Characteristic crossing point (T*≈2.7 K) in specific heat curves of samples RuSr2Gd1.5Ce0.5Cu2O10−δ taken for different values of magnetic field
B I Belevtsev et al 2009 J. Phys.: Condens. Matter 21 455602
Users also read
What's this?- Multiple plasmon excitations in adsorbed two-dimensional systems
- Interferometric determination of the topographies of absolute sphere radii using the sphere interferometer of PTB
- Mechanical properties of ternary lipid membranes near a liquid–liquid phase separation boundary
Related review articles
What's this?- Quasiparticle relaxation mechanisms in superconductor/ferromagnet bilayers
- Quantum criticality in the iron pnictides and chalcogenides
- Magnetism in Fe-based superconductors