BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
CALSCALE:GREGORIAN
PRODID:-//WordPress - MECv6.4.2//EN
X-ORIGINAL-URL:https://www.lps.u-psud.fr/
X-WR-CALNAME:Laboratoire de physique des Solides
X-WR-CALDESC:
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-PUBLISHED-TTL:PT1H
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VEVENT
CLASS:PUBLIC
DTSTART;TZID=Europe/Paris:20220307T140000
DTEND;TZID=Europe/Paris:20220307T180000
DTSTAMP:20220301T101600
UID:MEC-946e3ece1fc8b24bd656449d88eca941@lps.u-psud.fr
CREATED:20220301
LAST-MODIFIED:20220301
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Shuqiu Wang | Planar-Oxygen Orbital Ordering Mechanism of the Nematic State in Cuprates
DESCRIPTION:\nShuqiu Wang, Claredon Laboratory – Oxford\n\n\n\nUnforeseen among the quantum matter states of hole-doped CuO2 was the electronic nematic phase.  The quantum mechanical mechanism of this intra-unit-cell symmetry breaking state, which emerges concurrently with the enigmatic pseudogap phenomenon, is unknown. However, within the three-orbital Emery model of the CuO2 charge-transfer insulator, theoretical analyses1 now predict a nematic mechanism based on lifting the energy degeneracy of the two oxygen 2p6 orbitals in each unit cell. Such orbital ordering should be identifiable as a difference in charge-transfer energy separating oxygen 2p6 orbitals from the relevant copper 3d10orbital. Here we introduce sublattice resolvedimaging2,3 of charge transfer energy and discover a splitting of between at the two oxygen 2p6 orbitals within a CuO2 unit cell. Visualising the domains of this charge-transfer nematic finds them spatially on the 100 Å scale. Further, we observe the breaking of inversion symmetry in this charge-transfer nematic, as might be anticipated when time-reversal symmetry breaking is also present.  These data reveal that the mechanism of nematicity in the canonical cuprate Bi2Sr2CaCu2O8 is intra-unit-cell orbital ordering of the oxygen 2p6orbitals in the CuO2 plane.\n\n\n\nhttps://zoom.us/j/96356892672?pwd=QkNyNUk2UkI4WmR6VkVnMDdubm9QQT09\n\n\n\nID de réunion : 963 5689 2672Code secret : Z2NHPq\n
URL:https://www.lps.u-psud.fr/en/events/shuqiu-wang-planar-oxygen-orbital-ordering-mechanism-of-the-nematic-state-in-cuprates/
CATEGORIES:Seminar SMQ,Seminars
END:VEVENT
END:VCALENDAR