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SUMMARY:Chirality and Topology - Claudia Felser\, Max Planck Institute for
  Chemical Physics of Solids
DTSTART:20240501T150000Z
DTEND:20240501T160000Z
UID:TALK211054@talks.cam.ac.uk
CONTACT:Dr Nur Unal
DESCRIPTION:Chirality is a very active field of research in organic chemis
 try\, closely linked to the concept of symmetry. Topology\, a well-establi
 shed concept in mathematics\, has nowadays become essential to describe co
 ndensed matter [1\,2]. At its core are chiral electron states on the bulk\
 , surfaces and edges of the condensed matter systems\, in which spin and m
 omentum of the electrons are locked parallel or anti-parallel to each othe
 r. Magnetic and non-magnetic Weyl semimetals\, for example\, exhibit chira
 l bulk states that have enabled the realization of predictions from high e
 nergy and astrophysics involving the chiral quantum number\, such as the c
 hiral anomaly\, the mixed axial-gravitational anomaly and axions [3-5]. Ch
 iral topological crystals exhibit excellent chiral surface states [6\,7] a
 nd different orbital angular momentum for the enantiomers\, which can be a
 dvantageous in catalysis. The potential for connecting chirality as a quan
 tum number to other chiral phenomena across different areas of science\, i
 ncluding the asymmetry of matter and antimatter and the homochirality of l
 ife\, brings topological materials to the fore [8].\n\nReferences:\n\n[1] 
 M. G. Vergniory\, B. J. Wieder\, L. Elcoro\, S. S. P. Parkin\, C. Felser\,
  B. A. Bernevig\, N. Regnault\, Science 2022\, 376\, 6595.\n\n[2] P. Naran
 g\, C. A. C. Gracia and C. Felser\, Nat. Mater. 2021\, 20\, 293.\n\n[3] J.
  Gooth et al.\, Nature 2017\, 547\, 324.\n\n[4] J. Gooth et al.\, Nature 2
 019\, 575\, 315.\n\n[5] D. M. Nenno\, et al.\, Nat Rev Phys 2022\, 2\, 682
 .\n\n[6] B. Bradlyn\, J. Cano\, Z. Wang\, M. G. Vergniory\, C. Felser\, \n
 R. J. Cava and B. A. Bernevig\, Science 2016\, 353\, aaf5037.\n\n[7] N. B.
  M Schröter\, et al.\, Science 2020\, 369\, 179.\n\n[8] C. Felser\, J. G
 ooth\, preprint arXiv:2205.05809.
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, J.J. Thomson Avenu
 e
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