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-19180
DTSTART;TZID=Europe/Berlin:20221011T145000
SEQUENCE:1665439681
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20221011T162000
URL:https://dresden-science-calendar.de/calendar/de/detail/19180
LOCATION:TUD\,    
SUMMARY:Reichlova: Spontaneous Hall Effect in MnTe and Mn₅Si₃ Thin Film
 s
CLASS:PUBLIC
DESCRIPTION:Speaker: Helena Reichlova\nInstitute of Speaker: TU Dresden\, I
 FMP  and  IOP\, Czech Academy of Sciences\nTopics:\nPhysik\n Location:\n  
 Name: TUD ()\n  Street:   \n  City:  \n  Phone: \n  Fax: \nDescription: <p
 ><strong>Abstract:</strong></p>  <p>The spontaneous Hall effect has long b
 een studied in ferromagnets and used to be commonly associated with magnet
 ization. More recent developments of the intrinsic spontaneous Hall effect
  have predicted the phenomenon in systems with suppressed magnetization. I
 t has been subsequently observed in antiferromagnetic crystals with geomet
 rically frustrated lattices and/or typically exotic and rather strongly re
 lativistic elements [1]. The family of materials that can exhibit the spon
 taneous Hall effect has been significantly expanded by so-called altermagn
 ets with alternating spin polarizations in both crystal-structure real spa
 ce and electronic-structure momentum space. [2\,3]</p>  <p>I will first pr
 esent our experimental observation of a spontaneous anomalous Hall respons
 e in the absence of an external magnetic field in an altermagnetic film of
  MnTe\, which is a semiconductor with a collinear antiparallel magnetic or
 dering of Mn moments [4]. I will then present our observation of the spont
 aneous anomalous Hall effect in epitaxial thin-film Mn5Si3 [5] grown on a 
 Si(111) substrate. The epitaxial constraints stabilize a hexagonal unit ce
 ll in the magnetic state distinct from previously described phases in bulk
  Mn5Si3 crystals\, leading to altermagnetism and a sizable spontaneous ano
 malous Hall conductivity of 5-20 S/cm\, accompanied by a negligible net ma
 gnetization. Our results demonstrate the possibility of studying the topol
 ogy of bands with broken time-reversal symmetry in crystals with unfrustra
 ted lattices and weakly relativistic abundant elements.</p>  <p>[1] Nakats
 uji and Arita\, Annual Review of CMP <strong>13</strong> :119-142 (2022)</
 p>  <p>[2] Smejkal et al. Science Advances <strong>6</strong>\, 23 (2020)\
 ; Mazin et al. PNAS <strong>118</strong> 42 (2021)</p>  <p>[3] Smejkal et 
 al. Phys. Rev. X <strong>12</strong>\, 031042 (2022)</p>  <p>[4] Gonzales-
 Betancourt et al. arXiv:2112.06805</p>  <p>[5] Reichlova H. et al.\, arXiv
 :2012.15651</p>  <p><strong>BigBlueButton:</strong><br /> https://selfserv
 ice.zih.tu-dresden.de/l/link.php?m=188417&amp\;p=0c384d8f (https://selfser
 vice.zih.tu-dresden.de/l/link.php?m=188417&amp\;p=0c384d8f) (TUD)<br /> ht
 tps://selfservice.zih.tu-dresden.de/link.php?m=188417&amp\;p=e221c3c4 (htt
 ps://selfservice.zih.tu-dresden.de/link.php?m=188417&amp\;p=e221c3c4) (Ext
 ernal)</p>
DTSTAMP:20260711T140410Z
CREATED:20221009T221005Z
LAST-MODIFIED:20221010T220801Z
END:VEVENT
END:VCALENDAR