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UID:DSC-11800
DTSTART;TZID=Europe/Berlin:20161013T103000
SEQUENCE:1476344407
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20161013T113000
URL:https://dresden-science-calendar.de/calendar/en/detail/11800
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Bhowal: Spin-orbit driven emergent phases in correlated systems: Ir
 idates
CLASS:PUBLIC
DESCRIPTION:Speaker: Sayantika Bhowal\nInstitute of Speaker: IACS\, Kolkata
 \, India / TU Bergakademie Freiberg\nTopics:\nMaterialien\, Physik\n Locat
 ion:\n  Name: IFW (A 2E.30\, IFW Dresden)\n  Street: Helmholtzstraße 20\n
   City: 01069 Dresden\n  Phone: \n  Fax: \nDescription: The effect of spin
 -orbit coupling (SOC) in correlated electron systems has attracted conside
 rable attention in condensed matter physics as correlations and SOC togeth
 er can lead to emergent phases like novel jeff=1/2 Mott state\, quantum sp
 in-orbital liquid etc. Iridium oxides\, commonly known as iridates\, have 
 been an excellent playground to reveal such novel phenomena. In this conte
 xt\, 6-H perovskite iridates Ba3MIr2O9 are also quite intriguing as the no
 n magnetic M (=Zn\, Y) [1\,3] atom provides a knob to tailor the valence (
 4+\, 4.5+) of Ir. In this talk we shall explain the unconventional magneti
 sm in d4 double perovskite iridates. [2] Contrary to the common expectatio
 n  f spin orbit driven J=0 nonmagnetic state\, we find finite moment persi
 sts at the Ir site. Our study shows that the band structure effect rather 
 than the crystal field effect to be responsible for this breakdown. The an
 tiferromagnetic superexchange interaction between Ir moments\, in general\
 , makes these compounds insulating.  References: [1] Abhishek Nag\, S. Mid
 dey\, Sayantika Bhowal\, S. K. Panda\, Roland Mathieu\, J. C. Orain\, F. B
 ert\, P. Mendels\, P. G. Freeman\, M. Mansson\, H. M. Ronnow\, M. Telling\
 , P. K. Biswas\, D. Sheptyakov\, S. D. Kaushik\, Vasudeva Siruguri\, Carlo
  Meneghini\, D. D. Sarma\, Indra Dasgupta\, and Sugata Ray\, Phys. Rev. Le
 tt. 116\, 097205 (2016). [2] Sayantika Bhowal\, Santu Baidya\, Indra Dasgu
 pta\, and Tanusri Saha-Dasgupta\, Phys. Rev. B 92\, 121113(R) (2015). [3] 
 S. K. Panda\, S. Bhowal\, Ying Li\, S. Ganguly\, Roser Valenti'\, L. Nords
 trom\, and I. Dasgupta\, Phys. Rev. B 92\, 180403(R) (2015).  .
DTSTAMP:20260409T023443Z
CREATED:20160920T075529Z
LAST-MODIFIED:20161013T074007Z
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