BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:9
UID:UW-Physics-Event-7910
DTSTART:20230428T203000Z
DTEND:20230428T230000Z
DTSTAMP:20260414T033140Z
LAST-MODIFIED:20230424T233307Z
LOCATION:2241 Chamberlin Hall
SUMMARY:On Ising’s Model of Ferromagnetism\, Physics Department Coll
 oquium\, Peter Armitage\, Johns Hopkins University
DESCRIPTION:The 1D Ising model is a classical model of great historica
 l significance for both classical and quantum statistical mechanics. D
 evelopments in the understanding of the Ising model have fundamentally
  impacted our knowledge of thermodynamics\, critical phenomena\, magne
 tism\, conformal quantum field theories\, particle physics\, and fract
 ionalization in many-body systems. Despite the theoretical impact of t
 he Ising model there have been very few good 1D realizations of it in 
 actual real material systems. However\, it has been pointed out recent
 ly\, that the material CoNb2O6\, has a number of features that may mak
 e it the most ideal realization we have of the Ising model in one dime
 nsion. In this talk I will discuss the surprisingly complex physics re
 sulting in this simple model and review the history of “Ising’s mo
 del” from both a scientific and human perspective. In the modern con
 text I will review recent experiments by my group and others on CoNb2O
 6. In particular I will show how low frequency light in the THz range 
 gives unique insight into the tremendous zoo of phenomena arising in t
 his simple model system.
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\n[#1] C. M. Morris\, R. Valdés Aguilar\, A. Ghosh\, S. M. Koohpa
 yeh\, J. Krizan\, R. J. Cava\, O. Tchernyshyov\, T. M. McQueen\, N. P.
  Armitage\, "A hierarchy of bound states in the 1D ferromagnetic Ising
  chain CoNb2O6 investigated by high resolution time-domain terahertz s
 pectroscopy"\, Phys. Rev. Lett. 112\, 137403 (2014).
\n
\n
\n[#2] C. M
 . Morris\, Nisheeta Desai\, J. Viirok\, D. Hüvonen\, U. Nagel\, T. R�
 �õm\, J. W. Krizan\, R. J. Cava\, T. M. McQueen\, S. M. Koohpayeh\, R
 ibhu K. Kaul\, and N. P. Armitage\, "Duality and domain wall dynamics 
 in a twisted Kitaev chain"\, Nat. Phys. 17 832 (2021).
URL:https://www.physics.wisc.edu/events/?id=7910
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