Excitations from a chiral magnetized state of a frustrated quantum spin liquid (2009)
Zheludev, A., Garlea, V. O., Tsvelik, A., Habicht, K., Kiefer, K., ...
We study excitations in weakly interacting pairs of quantum spin ladders coupled through geometrically frustrated bonds. The ground state is a disordered spin liquid, that at high fields is replaced...
Breakdown of the N=0 Quantum Hall State in graphene: two insulating regimes (2009)
Zhang, L., Camacho, J., Cao, H., Chen, Y. P., Khodas, M., Kharzeev, D., ...
We studied the unusual Quantum Hall Effect (QHE) near the charge neutrality point (CNP) in high-mobility graphene sample for magnetic fields up to 18 T. We observe breakdown of the delocalized QHE...
Quasi-universal finite-$T$ scaling in gapped one-dimensional quantum magnets (2007)
Zheludev, A., Garlea, V. O., Manaka, H., Tsvelik, A.
Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-1-dimensional S=1/2 gapped quantum magnets IPA-CuCl3 and Sul-Cu2Cl4 using inelastic neutron scattering. The...
Towards a Field Theory of the Plateau Transition (1999)
Bhaseen, M. J., Kogan, I. I., Soloviev, O. A., Taniguchi, N., Tsvelik, A.
We suggest a procedure for calculating correlation functions of the local densities of states (DOS) at the plateau transitions in the Integer Quantum Hall effect (IQHE). We argue that their...
A Chern-Simons Effective Field Theory for the Pfaffian Quantum Hall State (1997)
Fradkin, E., Nayak, Chetan, Tsvelik, A., Wilczek, Frank
We present a low-energy effective field theory describing the universality class of the Pfaffian quantum Hall state. To arrive at this theory, we observe that the edge theory of the Pfaffian state of...
One-dimensional Kondo lattice model as a Tomonaga-Luttinger liquid (1997)
Shibata, N., Tsvelik, A., Ueda, K.
Arguments are presented that in the one-dimensional Kondo lattice model f-electron spins participate in filling of the Fermi sea. It is shown that in its paramagnetic phase this model belongs to the...
Three Body bound-states and the development of odd frequency pairing (1994)
Coleman, P., Miranda, E., Tsvelik, A.
We propose that the development of odd-frequency superconductivity is driven by the collective formation of neutral three body bound-states. Using a three-body bound-state ansatz we develop a...
Instabilities of the Abrikosov-Suhl resonance (1993)
Coleman, P., Miranda, E., Tsvelik, A.
We consider the possibility that instabilities of the Abrikosov-Suhl resonance lead to new fixed point behavior of the Kondo effect in a lattice environment. In one scenario, a pairing component to...
Odd Frequency Pairing in the Kondo Lattice (1993)
Coleman, P., Miranda, E., Tsvelik, A.
We discuss the possibility that heavy fermion superconductors involve odd-frequency pairing of the kind first considered by Berezinskii. Using a toy model for odd frequency triplet pairing in the...
Possible Realization of Odd Frequency Pairing in Heavy Fermion Compounds (1993)
Coleman, P., Miranda, E., Tsvelik, A.
Using Majorana Fermions to represent spins we re-examine the Kondo Lattice model for heavy fermions. The simplest decoupling procedure provides a realization of odd frequency superconductivity, with...