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:20220210T110000
DTEND;TZID=Europe/Paris:20220210T120000
DTSTAMP:20220205T134200
UID:MEC-731ae30af8750c2d28720ea3c1f8c2b1@lps.u-psud.fr
CREATED:20220205
LAST-MODIFIED:20220205
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:C. ORTIX: Non-linear and anomalous planar Hall effect in Dirac materials
DESCRIPTION:\n         \n\n\n\nIt has been recently established that Hall-like transverse currents can appear as a second-order response to an external electric field in a wide class of time-reversal symmetric and inversion-symmetry broken materials [1]. This non-linear Hall effect possesses a quantum contribution directly arising from the dipole moment of the Berry curvature, and has been recently observed in two-dimensional materials with strong spin-orbit coupling where the low-energy Dirac quasiparticles form tilted Dirac cones.\n\nI will show that this topological effect can appear even in absence of spin-orbit coupling [2]. In such systems, it is the warping of the Fermi surface that triggers sizeable Berry curvature dipoles. As a prominent example, I will show that uniaxially strained bilayer graphene with gate-induced bandgaps has dipoles comparable in strength to those observed in bilayer transition metal dichalcogenides [3]. In the second part of the talk, I will show that the Berry curvature in two-dimensional trigonal crystals can yield an anomalous  planar Hall effect [4] producing a transverse current even in a configuration where the driving electric field is aligned with the external magnetic field.\n\n\n\n[1] C. Ortix, Advanced Quantum Technologies 2100056 (2021).[2] R. Battilomo, N. Scopigno, C. Ortix, PRL 123, 196403 (2019).[3] S.-C. Ho, …, C. Ortix, T.-M. Chen, Nature Electronics 4, 116 (2021).[4] R. Battilomo, N. Scopigno, C. Ortix, Phys.Rev.Research 3, L012006(2021)\n
URL:https://www.lps.u-psud.fr/events/10022022ortix/
ORGANIZER;CN=Andrej Meszaros:MAILTO:
CATEGORIES:Séminaire de la Théorie de la Matière Condensée
LOCATION:Zoom (Online)
END:VEVENT
END:VCALENDAR