Nature of a topological quantum phase transition in a chiral spin liquid model (2009)
Chung, Suk Bum, Yao, Hong, Hughes, Taylor L., Kim, Eun-Ah
We study the finite temperature nature of a quantum phase transition between an Abelian and a non-Abelian topological phase in an exactly solvable model of a chiral spin liquid. By virtue of the...
Spin Aharonov-Bohm effect and topological spin transistor (2009)
Maciejko, Joseph, Kim, Eun-Ah, Qi, Xiao-Liang
Ever since its discovery, the electron spin has only been measured or manipulated through the application of an electromagnetic force acting on the associated magnetic moment. In this work, we...
Sun, Kai, Lawler, Michael J., Kim, Eun-Ah
We study the interplay between charge and spin ordering in electronic liquid crystalline states with a particular emphasis on fluctuating spin stripe phenomena observed in recent neutron scattering...
Fractional vortex lattice structures in spin triplet superconductors (2009)
Chung, Suk Bum, Agterberg, Daniel F., Kim, Eun-Ah
Motivated by recent interest in spin triplet superconductors, we investigate the vortex lattice structures for this class of unconventional superconductors. We discuss how the order parameter...
Local Interlayer Tunneling Between Two-Dimensional Electron Systems in the Ballistic Regime (2009)
Luna, Katherine, Kim, Eun-Ah, Oreto, Paul, Kivelson, Steven A., Goldhaber-Gordon, David
We study a theoretical model of virtual scanning tunneling microscopy (VSTM), a proposed application of interlayer tunneling in a bilayer system to locally probe two-dimensional electron systems...
Universal entanglement entropy in 2D conformal quantum critical points (2008)
Hsu, Benjamin, Mulligan, Michael, Fradkin, Eduardo, Kim, Eun-Ah
We study the scaling behavior of the entanglement entropy of two dimensional conformal quantum critical systems, i.e. systems with scale invariant wave functions. They include two-dimensional...
Interference of nematic quantum critical quasiparticles: a route to the octet model (2008)
Kim, Eun-Ah, Lawler, Michael J.
Repeated observations of inhomogeneity in cuperate superconductors[1-5] make one immediately question the existance of coherent quasiparticles(qp's) and the applicability of a momentum space picture....
Corner Junction as a Probe of Helical Edge States (2008)
Hou, Chang-Yu, Kim, Eun-Ah, Chamon, Claudio
We propose and analyze inter-edge tunneling in a quantum spin Hall corner junction as a means to probe the helical nature of the edge states. We show that electron-electron interactions in the...
Non-abelian statistics in the interference noise of the Moore–Read quantum Hall state (2008)
We propose noise oscillation measurements in a double point contact, accessible with current technology, to seek for a signature of the non-abelian nature of the ν = 5/2 quantum Hall state....
Stability of half-quantum vorticies in p_x+ip_y superconductors (2007)
Chung, Suk Bum, Bluhm, Hendrik, Kim, Eun-Ah
We consider the stability conditions for half-quantum vortices in quasi two dimensional $p_x+ip_y$ superconductor (such as ${\rm Sr_2 RuO_4}$ is believed to be) through energetics calculations....
Theory of the nodal nematic quantum phase transition in superconductors (2007)
Kim, Eun-Ah, Lawler, Michael J., Oreto, Paul, Sachdev, Subir, Fradkin, Eduardo, Kivelson, Steven A.
We study the character of an Ising nematic quantum phase transition (QPT) deep inside a d-wave superconducting state with nodal quasiparticles in a two-dimensional tetragonal crystal. We find that,...
Non-Abelian statistics in the interference noise of the Moore-Read quantum Hall state (2007)
We propose noise oscillation measurements in a double point contact, accessible with current technology, to seek for a signature of the non-abelian nature of the \nu=5/2 quantum Hall state....
Dynamical layer decoupling in a stripe-ordered, high T_c superconductor (2007)
Berg, Erez, Fradkin, Eduardo, Kim, Eun-Ah, Kivelson, Steven A., Oganesyan, Vadim, Tranquada, John, ...
In the stripe-ordered state of a strongly-correlated two-dimensional electronic system, under a set of special circumstances, the superconducting condensate, like the magnetic order, can occur at a...
Graphene as an electronic membrane (2007)
Kim, Eun-Ah, Neto, A. H. Castro
Experiments are finally revealing intricate facts about graphene which go beyond the ideal picture of relativistic Dirac fermions in pristine two dimensional (2D) space, two years after its first...
Theory of stripes in quasi two dimensional rare-earth tritellurides (2006)
Yao, Hong, Robertson, John A., Kim, Eun-Ah, Kivelson, Steven A.
Even though the rare-earth tritellurides are tetragonal materials with a quasi two dimensional (2D) band structure, they have a "hidden" 1D character. The resultant near-perfect nesting of the Fermi...
Aharanov-Bohm interference and fractional statistics in a quantum Hall interferometer (2006)
We compute the temperature, voltage, and magnetic field dependences of the resistance oscillations of a model interferometer designed to measure the fractional statistics of the quasiparticles in the...
Kim, Eun-Ah, Lawler, Michael J., Vishveshwara, Smitha, Fradkin, Eduardo
A central long standing prediction of the theory of fractional quantum Hall (FQH) states that it is a topological fluid whose elementary excitations are vortices with fractional charge and fractional...
Signatures of fractional statistics in noise experiments in quantum Hall fluids (2005)
Kim, Eun-Ah, Lawler, Michael, Vishveshwara, Smitha, Fradkin, Eduardo
The elementary excitations of fractional quantum Hall (FQH) fluids are vortices with fractional statistics. Yet, this fundamental prediction has remained an open experimental challenge. Here we show...
Quantum Hall line junction with impurities as a multi-slit Luttinger liquid interferometer (2004)
Yang, I., Kang, W., Pfeiffer, L. N., Baldwin, K. W., West, K. W., Kim, Eun-Ah, ...
We report on quantum interference between a pair of counterpropagating quantum Hall edge states that are separated by a high quality tunnel barrier. Observed Aharonov-Bohm oscillations are analyzed...
Cooper pair tunneling in junctions of singlet quantum Hall states and superconductors (2004)
Kim, Eun-Ah, Vishveshwara, Smitha, Fradkin, Eduardo
We propose tunnel junctions of a Hall bar and a superconducting lead, for observing Cooper-pair tunneling into singlet fractional quantum Hall edge states. These tunnel junctions provide a natural...
Phase Transitions in Models for Coupled Charge-Density Waves (2004)
Lee, Minchul, Kim, Eun-Ah, Lim, Jong Soo, Choi, M. Y.
Various phase transitions in models for coupled charge-density waves are investigated by means of the $\epsilon$-expansion, mean-field theory, and Monte Carlo simulations. At zero temperature the...
Double point contact in Quantum Hall Line Junctions (2003)
We show that multiple point contacts on a barrier separating two laterally coupled quantum Hall fluids induce Aharonov-Bohm (AB) oscillations in the tunneling conductance. These quantum coherence...
Inter edge Tunneling in Quantum Hall Line Junctions (2002)
We propose a scenario to understand the puzzling features of the recent experiment by Kang and coworkers on tunneling between laterally coupled quantum Hall liquids by modeling the system as a pair...
Modelling of nitrogen removal in Ankara wastewater treatment plant. (2002)
Thesis for the degree of Master of Science in the Department of Environmental Engineering.