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40 papers · 2 filters
Incommensurate Matrix Product State for Quantum Spin Systems
Hiroshi Ueda, Isao Maruyama
We introduce a matrix product state (MPS) with an incommensurate periodicity by applying the spin-rotation operator of each site to a uniform MPS in the thermodynamic limit. The sp…
Spin nematic order in multiple-spin exchange models on the triangular lattice
Tsutomu Momoi, Philippe Sindzingre, Kenn Kubo
We figure out that the ground state of a multiple-spin exchange model applicable to thin films of solid 3He possesses an octahedral spin nematic order. In the presence of magnetic…
On the nature of the optical conductivity of polaron
G. De Filippis, V. Cataudella, A. S. Mishchenko +1
We study theoretically a fundamental issue in solids: the evolution of the optical spectra of polaron as the electron-phonon coupling increases. By comparing the exact results obta…
Subband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO
P. D. C. King, R. H. He, T. Eknapakul +13
We demonstrate the formation of a two-dimensional electron gas (2DEG) at the surface of the transition-metal oxide KTaO. From angle-resolved photoemission, we find…
Higgs transition from a magnetic Coulomb liquid to a ferromagnet in Yb_2Ti_2O_7
Lieh-Jeng Chang, Shigeki Onoda, Yixi Su +5
In a class of frustrated magnets known as spin ice, magnetic monopoles emerge as classical defects and interact via the magnetic Coulomb law. With quantum-mechanical interactions,…
Nematic phase and phase separation near saturation field in frustrated ferromagnets
Hiroaki T. Ueda, Tsutomu Momoi
We study the effects of quantum fluctuations in magnetic properties of quantum frustrated ferromagnets in a magnetic field. It is shown that a non-classical phase or a phase separa…