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DTSTAMP:20260424T143444Z
UID:65b1088889566747861572@ist.ac.at
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DESCRIPTION:Speaker: Peter Armitage\nhosted by Zhanybek Alpischev\nAbstract
 : The 1D Ising model is a classical model of great historical significance
  for both classical and quantum statistical mechanics. Developments in the
  understanding of the Ising model have fundamentally impacted our knowledg
 e of thermodynamics\, critical phenomena\, magnetism\, conformal quantum f
 ield theories\, particle physics\, and fractionalization in many-body syst
 ems. Despite the theoretical impact of the Ising model there have been ver
 y few good 1D realizations of it in actual real material systems. However\
 , it has been pointed out recently\, that the material CoNb2O6\, has a num
 ber of features that may make it the most ideal realization we have of the
  Ising model in one dimension. In this talk I will discuss the surprisingl
 y complex physics resulting in this simple model and review the history of
  Isings model from both a scientific and human perspective. In the modern 
 context I will review recent experiments by my group and others on CoNb2O6
 . In particular I will show how low frequency light in the THz range gives
  unique insight into the tremendous zoo of phenomena arising in this simpl
 e model system.C. M. Morris\, R. Valds Aguilar\, A. Ghosh\, S. M. Koohpaye
 h\, J. Krizan\, R. J. Cava\, O. Tchernyshyov\, T. M. McQueen\, N. P. Armit
 age\, "A hierarchy of bound states in the 1D ferromagnetic Ising chain CoN
 b2O6 investigated by high resolution time-domain terahertz spectroscopy"\,
  Phys. Rev. Lett. 112\, 137403 (2014).Julia Steinberg\, N.P. Armitage\, Fa
 bian H.L. Essler\, Subir Sachdev\, "NMR relaxation in Ising spin chains\, 
 Phys. Rev. B 99\, 035156 (2019).C. M. Morris\, Nisheeta Desai\, J. Viirok\
 , D. Hvonen\, U. Nagel\, T. Rm\, J. W. Krizan\, R. J. Cava\, T. M. McQueen
 \, S. M. Koohpayeh\, Ribhu K. Kaul\, and N. P. Armitage\, "Duality and dom
 ain wall dynamics in a twisted Kitaev chain"\, Nat. Phys. 17 832 (2021).
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Peter Armitage: On Isings Model of Ferromagnetism
URL:https://talks-calendar.ista.ac.at/events/5446
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