1. toward a spin jam theory, semi-classical and quantum

Seung-Hun Lee

University of Virginia, USA

6 July 2021 Tue 11 am

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

One of the most intriguing and elusive states of matter is spin liquid in which strong spin fluctuations prevent conventional magnetic order. Promising experimental candidates for spin liquid have been frustrated magnets where spins cannot order due to competing interactions. More often than not, however, at low temperatures such materials in nature exhibit glassy behaviors rather than spin liquid ones. The exact nature of the glassy states is yet to be fully understood. In this talk, I will address this issue by discussing experimental studies on semi-classical and quantum magnets.


[1] Freezing of a disorder induced spin liquid with strong quantum fluctuations, Xiao Hu, Daniel M. Pajerowski, Depei Zhang, Andrey A. Podlesnyak, Yiming Qiu, Qing Huang, Haidong Zhou, Israel Klich, Alexander I. Kolesnikov, Matthew B. Stone, S.-H. Lee, PRL in press (2021).

[2] Scaling of Memories and Crossover in Glassy Magnets, A. M. Samarakoon, M. Takahashi, D. Zhang, J. Yang, N. Katayama, R. Sinclair, H. D. Zhou, S. O. Diallo, G. Ehlers, D. A. Tennant, S. Wakimoto, K. Yamada, G-W. Chern, T. J. Sato, S.-H. Lee, Scientific Reports 7, 12053 (2017).

[3] Aging, memory and nonhierarchical energy landscape of a spin jam, A. Samarakoon, T. J. Sato, T. Chen, G.-W. Chern, J. Yang, I. Klich, R. Sinclair, H. Zhou, S.-H. Lee, Proceedings of the National Academy of Sciences 113, 11806-11810 (2016).

[4] Spin jam induced by quantum fluctuations in a frustrated magnet, J. Yang, A. Samarakoon, S. Dissanayake, H. Ueda, I. Klich, K. Iida, D. Pajerowski, N. P. Butch, Q. Huang, J. Copley, S.-H. Lee, Proceedings of the National Academy of Sciences 112, 11519-11523 (2015).

[5] Glassiness and exotic entropy scaling induced by quantum fluctuations in a disorder-free frustrated magnet, I. Klich, S.-H. Lee, K. Iida, Nature Comm. 5, 3497 (2014).