Speaker
Dr
Subhrangsu Sarkar
(University of Fribourg)
Description
Using RIXS and REXS, we measured the systematic modification of Cu-charge density wave in optimally doped YBa2Cu3O7, under the interfacial proximity of Nd1-x(Ca1-ySry)xMnO3 as function of the hole doping and tolerance factor of the manganite layers.
For x=0.35, we observe the Cu-CDW order with the usual dx2-y2 orbital character at Q||=0.3 r.l.u, which gets strongly enhanced as the tolerance factor of the manganite layers is decreased or when a strong magnetic field is applied.
For x=0.5 and y=0.25, we observe a completely new kind of Cu-order which has a small wave vector of Q||=0.1 r.l.u., a much larger correlation length of about 40nm and a completely different dz2 orbital character.
Author
Dr
Subhrangsu Sarkar
(University of Fribourg)
Co-authors
Dr
Roxana Capu
(University of Fribourg, CH; University of Timisoara, RO)
Dr
Jarji Khmaladze
(University of Fribourg)
Mr
Mathias Soulier
(University of Fribourg)
Dr
Edith Perret
(University of Fribourg; EMPA, St. Gallen)
Prof.
Claude Monney
(University of Fribourg)
Dr
Thorsten Schmitt
(Paul Scherrer Institut)
Dr
Cinthia Piamonteze
(PSI - Paul Scherrer Institut)
Dr
Eugen Weschke
(Helmholtz-Zentrum Berlin für Materialen und Energie, BESSY II)
Prof.
Christian Bernhard
(Université de Fribourg)