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UID:DSC-19414
DTSTART;TZID=Europe/Berlin:20230117T145000
SEQUENCE:1673937560
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20230117T162000
URL:https://dresden-science-calendar.de/calendar/de/detail/19414
LOCATION:TUD\,    
SUMMARY:Šmejkal: Altermagnetism and Spintronics
CLASS:PUBLIC
DESCRIPTION:Speaker: Libor Šmejkal\nInstitute of Speaker: Johannes Gutenbe
 rg University\, Mainz and Academy of Sciences of the Czech Republic\, Prag
 ue\nTopics:\nPhysik\n Location:\n  Name: TUD ()\n  Street:   \n  City:  \n
   Phone: \n  Fax: \nDescription: <p><strong>Abstract:</strong></p>  <p>Dif
 ferent phases of matter can be distinguished by symmetry\, order parameter
 s and topological properties [1]. In this talk I will discuss the classifi
 cation of magnetically ordered crystals according to recently studied spin
  symmetries [2]. Spin symmetries consider pairs of operations in spin and 
 crystal space and remarkably reveal a non-traditional magnetic class. This
  unconventional class\, called altermagnetism\, is distinct from ferromagn
 ets and antiferromagnets. It is characterized by an unusual alternating sp
 in order in electronic momentum space in the d\, g\, i-wave form that brea
 ks time reversal symmetry and is spin-compensated and anisotropic [2]. We 
 show that the ordering in momentum space can arise from ordered and anisot
 ropic spin densities in real space (see figure) as described for a typical
  ruthenium dioxide altermagnet [2\,3\,4\,6].</p>  <p>In the second part of
  the talk\, I will discuss theoretically proposed unconventional and promi
 sing applications of altermagnetism in spintronics\, including giant magne
 toresistance and anomalous currents [3-7]. I will explain that the recentl
 y reported unconventional anomalous Hall current in ruthenium oxide provid
 es experimental evidence for the theoretically predicted altermagnetic eff
 ect [3\,6\,7]. Finally\, I will discuss emerging avenues for the study of 
 altermagnetism [2].</p>  <p>[1] Šmejkal\, L.\, Mokrousov\, Y.\, Yan\, B.\
 , and MacDonald\, A.H.\, Nature Phys. <strong>14</strong>\, 242–251 (201
 8)<br /> [2] Šmejkal\, L.\, Sinova\, J.\, and Jungwirth\, T.\, Phys. Rev.
  X <strong>12</strong>\, 031042 and 040501 (2022)<br /> [3] Šmejkal\, L. 
 et al.\, Science Advances <strong>6</strong>\, eaaz8809 (2020)\, arXiv:190
 1.00445<br /> [4] Mazin\, I.I et al.\, PNAS <strong>118</strong> (42) e210
 8924118 (2021)<br /> [5] Šmejkal\, L.\, et al.\, Phys. Rev. X\, <strong>1
 2</strong>\, 011028 (2022)<br /> [6] Feng\, Z.\, Zhou\, X.\, Šmejkal\, L.
  et al.\, Nat. Electron. <strong>5</strong>\, 743 (2022)<br /> [7] Šmej
 kal\, L.\, MacDonald\, A.H.\, Sinova\, J.\, Nakatsuji\, S.\,
  and Jungwirth\, T.\, Nat. Rev. Mater. <strong>7</strong>\,
  482 (2022)</p>  <p><strong>BigBlueButton:</strong><br /> https://self
 service.zih.tu-dresden.de/l/link.php?m=188429&amp\;p=c15b0f19 (https://sel
 fservice.zih.tu-dresden.de/l/link.php?m=188429&amp\;p=c15b0f19) (TUD)<br /
 > https://selfservice.zih.tu-dresden.de/link.php?m=188429&amp\;p=d5c44dee 
 (https://selfservice.zih.tu-dresden.de/link.php?m=188429&amp\;p=d5c44dee) 
 (External)</p>
DTSTAMP:20260524T142131Z
CREATED:20230112T063923Z
LAST-MODIFIED:20230117T063920Z
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