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10 papers · 2 filters
Bounded Luttinger liquids as a universality class of quantum critical behavior
Johannes Voit, Yupeng Wang, Marco Grioni
We show that one-dimensional quantum systems with gapless degrees of freedom and open boundary conditions form a new universality class of quantum critical behavior, which we propo…
Modulation structure of a frustrated spin ladder
Yupeng Wang
We study a two-leg spin-1/2 ladder with isotropic exchanges and biquadratic interactions in the basic plaquettes. It is shown that for the extremely frustrated case, the system exh…
Orbitally Driven Spin Pairing in the 3D Non-Magnetic Mott Insulator BaVS3: Evidence from Single Crystal Studies
G. Mihaly, I. Kezsmarki, F. Zamborszky +5
Static electrical and magnetic properties of single crystal BaVS_3 were measured over the structural (T_S=240K), metal-insulator (T_MI=69K), and suspected orbital ordering (T_X=30K…
Two Magnetic Impurities with Arbitrary Spins in Open Boundary t-J Model
Zhan-Ning Hu, Fu-Cho Pu
From the open boundary t-J model, an impurity model is constructed in which magnetic impurities of arbitrary spins are coupled to the edges of the strongly correlated electron syst…
New Boundary Bound States in an Open Quantum Spin Chain
Zhan-Ning Hu
New boundary bound states (BBS) are found of an integrable model with the magnetic impurities located at the edges of an open Heisenberg spin chain. These bound states carry the re…
Single particle and collective excitations in the one-dimensional charge density wave solid K0.3MoO3 probed in real time by femtosecond spectroscopy
J. Demsar, K. Biljakovic, D. Mihailovic
Ultrafast transient reflectivity changes caused by collective and single particle excitations in the quasi one-dimensional charge-density wave (CDW) semiconductor K0.3MoO3 are inve…