Tatsuhiko N. Ikeda   Koki Chinzei   and Masahiro Sato   
SciPost Physics Core 4(033) 2021年12月 [査読有り]
Nonequilibrium steady states (NESSs) in periodically driven
dissipative quantum systems are vital in Floquet engineering. We develop
a general theory for high-frequency drives with Lindblad-type
dissipation to characterize and analyze NESSs. This ...
<title>Abstract</title>A triplon refers to a fictitious particle that carries angular momentum <italic>S</italic>=1 corresponding to the elementary excitation in a broad class of quantum dimerized spin systems. Such systems without magnetic order ...
Shunsuke C. Furuya   Kazuaki Takasan   and Masahiro Sato   
Physical Review Research 3(3) 033066-1-033066-24 2021年7月 [査読有り]
We discuss DC electric-field controls of superexchange interactions. We first present generic results about antiferromagnetic and ferromagnetic superexchange interactions valid in a broad class of Mott insulators, where we also estimate typical fi...
T Sakai   K Okamoto   K Okunishi   M Sato   
JOURNAL OF PHYSICS-CONDENSED MATTER 16(11) S785-S789 2004年3月
We study, at T = 0, the anomalies in the magnetization curve of the S = 1 two-leg ladder with frustrated interactions. We focus mainly on the existence of the M = M-s/2 plateau, where M-s is the saturation magnetization. We report the results usin...