メーリングリストの皆様
東京大学生産技術研究所の李と申します。
羽田野研究室では、下記の通りセミナーを開催致します。
皆様の奮ってのご参加をお待ちしております。
なお、当研究室におけるセミナー情報は、次のリンクよりご覧頂けます。
hatano-lab.iis.u-tokyo.ac.jp/seminar-j.html
当セミナーは原則として現地会場での開催となりますが、オンライン参加をご希望の方はご連絡下さい。
*本案内は複数のメーリングリストにお送りしております。重複して受け取られました方は何卒ご容赦下さい。
Dear All,
This is Jaeha Lee from the Institute of Industrial Science, the University of Tokyo.
We are pleased to announce an upcoming seminar as follows.
Information regarding our seminar series is available on our web site.
hatano-lab.iis.u-tokyo.ac.jp/seminar-e.html
Those who are interested are welcome to join us on-site. For those who wish to join us online, please feel free to contact us.
* Apologies if you have received multiple copies of this announcement.
記
日時:2025年01月30日(木)14時30分〜 / Thursday, 30th January 2025, 14:30 JST –
場所:東京大学生産技術研究所 研究実験棟I大会議室 / The large conference room, Research and Testing Complex I, IIS, the University of Tokyo
来場:http://hatano-lab.iis.u-tokyo.ac.jp/access-j.html / hatano-lab.iis.u-tokyo.ac.jp/access-e.html
講師:Igor Herbut さん(Simon Fraser U.)
演題:SO(8) unified theory of two-dimensional interacting Dirac fermions
要旨:Dirac fermions appear as low-energy quasiparticle excitations in many condensed matter systems of current interest. They are often weakly interacting, as in graphene for example, but at strong interactions they can also exhibit many ordered ground states by going through phase transitions at which gapless Dirac fermions play a crucial role. A prime example of such a transition occurs in the standard Hubbard model on honeycomb lattice at half filling, which has a semimetal – Mott insulator transition in the so-called Heisenberg-Gross-Neveu universality class. (1) I will discuss a unifying theory of all leading order parameters for Dirac systems in two-dimensions, based on the hidden SO(8) symmetry in the Majorana representation of the problem. (2) The phenomena such as doping-induced insulator-superconductor transition, and new critical points induced by Dirac fermions, will be discussed time permitting.
(1) I. F. Herbut, Interactions and phase transitions on graphene’s honeycomb lattice, Phys. Rev. Lett. vol. 97, 146401 (2006).
(2) I. F. Herbut, S. Mandal, SO(8) unification and the large-N theory of superconductor-insulator transition in two-dimensional Dirac fermions, Phys. Rev. B vol. 108, L161108 (2023).
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李 宰河
〒277-8574 千葉県柏市柏の葉5-1-5
東京大学生産技術研究所
電 話:04-7136-6962
メール:lee@iis.u-tokyo.ac.jp
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