TY - JOUR
T1 - Experimental Evidence for Static Charge Density Waves in Iron Oxypnictides
AU - Martinelli, A.
AU - Manfrinetti, P.
AU - Provino, A.
AU - Genovese, Alessandro
AU - Caglieris, F.
AU - Lamura, G.
AU - Ritter, C.
AU - Putti, M.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors acknowledge the ESRF for synchrotron beam time (proposal HC-1468); A. M. acknowledges Andy Fitch for his kind support and experimental assistance during the data collection at the ID22 beam line of ESRF (proposal HC-1468). This work is partially supported by RIDEIRON project (PRIN No. 2012X3YFZ2).
PY - 2017/1/31
Y1 - 2017/1/31
N2 - In this Letter we report high-resolution synchrotron x-ray powder diffraction and transmission electron microscope analysis of Mn-substituted LaFeAsO samples, demonstrating that a static incommensurate modulated structure develops across the low-temperature orthorhombic phase, whose modulation wave vector depends on the Mn content. The incommensurate structural distortion is likely originating from a charge-density-wave instability, a periodic modulation of the density of conduction electrons associated with a modulation of the atomic positions. Our results add a new component in the physics of Fe-based superconductors, indicating that the density wave ordering is charge driven.
AB - In this Letter we report high-resolution synchrotron x-ray powder diffraction and transmission electron microscope analysis of Mn-substituted LaFeAsO samples, demonstrating that a static incommensurate modulated structure develops across the low-temperature orthorhombic phase, whose modulation wave vector depends on the Mn content. The incommensurate structural distortion is likely originating from a charge-density-wave instability, a periodic modulation of the density of conduction electrons associated with a modulation of the atomic positions. Our results add a new component in the physics of Fe-based superconductors, indicating that the density wave ordering is charge driven.
UR - http://hdl.handle.net/10754/622943
UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.055701
UR - http://www.scopus.com/inward/record.url?scp=85012874637&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.118.055701
DO - 10.1103/PhysRevLett.118.055701
M3 - Article
C2 - 28211724
SN - 0031-9007
VL - 118
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
ER -