Mizuno, M., Kim, Eugene H., Martins, G. B.
Transport through carbon nanotube (CNT) quantum dots (QDs) in a magnetic field is discussed. The evolution of the system from the ultraviolet to the infrared is analyzed; the strongly correlated (SC)...
Topological Order, Dimerization, and Spinon Deconfinement in Frustrated Spin Ladders (2007)
Kim, Eugene H., Legeza, Ö., Sólyom, J.
We consider topological order and dimer order in several frustrated spin ladder models, which are related to higher dimensional models of current interest; we also address the occurrence of...
Pricing of Options Using the Path Integral Monte Carlo Approach (2007)
Eugene H. Kim, Miloje S. Makivic
A path integral Monte Carlo method is implemented in a parallel computing environment to price a family of derivative securities known as options. In the path integral method, we construct a...
Signatures of Electronic Nematic Phase at Isotropic-Nematic Phase Transition (2003)
Kee, Hae-Young, Kim, Eugene H., Chung, Chung-Hou
The electronic nematic phase occurs when the point-group symmetry of the lattice structure is broken, due to electron-electron interactions. We study a model for the nematic phase on a square lattice...
Pseudogap Kondo Physics from Charge Fluctuations in a Quantum Dot (2002)
Kim, Eugene H., Kim, Yong Baek, Kallin, C.
We consider charge fluctuations in a quantum dot coupled to an interacting one-dimensional electron liquid. We find the behavior of this system to be similar to the multichannel pseudogap Kondo...
Role of Umklapp Processes in Conductivity of Doped Two-Leg Ladders (2002)
Byrne, Patrick, Kim, Eugene H., Kallin, Catherine
Recent conductivity measurements performed on the hole-doped two-leg ladder material $\mathrm{Sr_{14-x}Ca_xCu_{24}O_{41}}$ reveal an approximately linear power law regime in the c-axis DC resistivity...
Kondo Effect in Carbon Nanotube Single-Electron Transistors (2002)
Kim, Eugene H., Sierra, German, Kallin, C.
Recently, Coulomb blockade physics was observed at room temperature in a carbon nanotube single-electron transistor (H. W. Ch. Postma, et. al., Science 293, 76 (2001)). In this work, we suggest that...
Kondo Effect in Quantum Dots Coupled to Luttinger Liquid Leads (2001)
We consider the Kondo effect in quantum dots coupled to Luttinger liquid leads, focussing on the case of repulsive interactions and spin SU(2) symmetry in the leads. We find that the system can flow...
Conductivity of Doped Two-Leg Ladders (2000)
Recently, conductivity measurements were performed on the hole-doped two-leg ladder material Sr_{14-x}Ca_xCu_{24}O_{41}. In this work, we calculate the conductivity for doped two-leg ladders using a...
Phase Transitions Between Topologically Distinct Gapped Phases in Isotropic Spin Ladders (1999)
Kim, Eugene H., Fath, G., Solyom, J., Scalapino, D. J.
We consider various two-leg ladder models exhibiting gapped phases. All of these phases have short-ranged valence bond ground states, and they all exhibit string order. However, we show that...
Spin symmetry breaking in bilayer quantum Hall systems (1999)
Demler, Eugene, Kim, Eugene H., Sarma, S. Das
Based on the construction of generalized Halperin wave functions, we predict the possible existence of a large class of broken spin symmetry states in bilayer quantum Hall structures, generalizing...
Opening of the Haldane Gap in Anisotropic Two- and Four-Leg Spin Ladders (1999)
We study the opening of the Haldane gap in two-leg and four-leg anisotropic spin ladders using bosonization and renormalization group methods, and we determine the phase diagram as a function of the...
Recurrent Variational Approach to the Two-Leg Hubbard Ladder (1999)
Kim, Eugene H., Sierra, German, Duffy, Daniel
We applied the Recurrent Variational Approach to the two-leg Hubbard ladder. At half-filling, our variational Ansatz was a generalization of the resonating valence bond state. At finite doping, hole...
Penetration Depth and the Conductivity Sum Rule for a Model With Incoherent c-axis Coupling (1997)
The conductivity sum rule for a one-band hopping model relates the integrated spectral weight of the real part of the conductivity to the average kinetic energy. For such a model, the superconducting...