BEGIN:VCALENDAR
VERSION:2.0
PRODID:www.dresden-science-calendar.de
METHOD:PUBLISH
CALSCALE:GREGORIAN
X-MICROSOFT-CALSCALE:GREGORIAN
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VTIMEZONE
TZID:Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19810329T030000
RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19961027T030000
RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:DSC-15848
DTSTART;TZID=Europe/Berlin:20190402T170000
SEQUENCE:1554768518
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20190402T180000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/15848
LOCATION:MPI-CPfS\, Nöthnitzer Straße 4001187 Dresden
SUMMARY:Takagi: When spin-orbit coupling meets with electron correlations
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Dr. Hidenori Takagi\nInstitute of Speaker: MPI F
 KF Stuttgart\nTopics:\nPhysik\, Chemie\n Location:\n  Name: MPI-CPfS (Semi
 narraum 1+2\, Nöthnitzer Straße 40\, 01187 Dresden)\n  Street: Nöthnitz
 er Straße 40\n  City: 01187 Dresden\n  Phone: \n  Fax: \nDescription: The
  exploration of novel phases of interacting electrons (correlated electron
 s) has long been a major stream of condensed-matter research. Many-body in
 teractions among electrons give rise to a huge variety of phases\, grouped
  into electron-solid\, -liquid-crystal\, -liquid and -gas states. The weal
 th of possibilities arises from a complicated interplay of lattice geometr
 y\, quantum effects and the multiple degrees of freedom of the electron (c
 harge\, spin and orbital). In the past\, the two dominant areas of explora
 tion have been the 3d transition-metal (TM) oxides and the 4f intermetalli
 c compounds but recently 5d TM oxides and related compounds have emerged a
 s the next arena of correlated-electron physics. Significant new physics i
 s expected due to the presence of a large spin-orbit coupling in heavy 5d 
 elements\, tying together the otherwise independent spin and orbital degre
 es of freedom. This can be of order 0.5eV and is often larger than the cry
 stal-field splitting of the orbital states\, resulting in a spin-orbital-e
 ntangled state of correlated electrons. The nature of the spin-orbital ent
 anglement depends significantly on the d-electron number and the chemical 
 bonding\, and it is anticipated that\, in combination with electron correl
 ations\, a rich variety of novel electronic phases are waiting to be disco
 vered. To name just a few\, the proposed phases include Kitaev quantum spi
 n liquids\, correlated topological semimetals\, excitonic magnets and mult
 ipolar-ordered states.   In this talk\, I will present our recent explorat
 ion of such exotic faces of spin-orbital entangled matter in 5d (and 4d) t
 ransition metal oxides. Topics will include the following.  (I) Spin-orbit
 al quantum liquid on honeycomb lattice in 5d5H3LiIr2O6 [1]. (II) Jeff = 0 
 Mott insulator [2] in 4d4 Ru4+ oxides and proximity to excitonic magnetism
 . (III) Multipolar ordering in 5d1 Ta4+ chlorides [3].  References  [1] K.
  Kitagawa\, T. Takayama\, Y. Matsumoto\, A. Kato\, R. Takano\, Y. Kishimot
 o\, S. Bette\, R. Dinnebier\, G. Jackeli\, and H. Takagi\, Nature\, 554\, 
 341–345 (2018). [2] G. Khaliullin\, Phys. Rev. Lett. 111\, 197201 (2013)
 . [3] H. Ishikawa\, T. Takayama\, R. Kremer\, J. Nuss\, R. Dinnebier\, K. 
 Kitagawa3\, K. Ishii and H. Takagi\, submitted.
DTSTAMP:20260709T025756Z
CREATED:20190329T000928Z
LAST-MODIFIED:20190409T000838Z
END:VEVENT
END:VCALENDAR