771 citations · 6.5k across the 114 of their papers we have counts for
19 papers · 1 filter
Tuning between continuous time crystals and many-body scars in long-range XYZ spin chains
Kieran Bull, Andrew Hallam, Zlatko Papić +1
Persistent oscillatory dynamics in non-equilibrium many-body systems is a tantalizing manifestation of ergodicity breakdown that continues to attract much attention. Recent works h…
Integrable nonunitary quantum circuits
Lei Su, Ivar Martin
We show that the integrable Lindblad superoperators found recently can be used to build integrable nonunitary quantum circuits with two-site gates by demonstrating that the $\check…
Moire superconductivity
Ivar Martin
Recently, superconductivity was discovered at very low densities in slightly misaligned graphene multilayers. Surprisingly, despite extremely low electronic density (about $10^{-4}…
Non-equilibrium theory of tunneling into localized state in superconductor
Ivar Martin, Dmitry Mozyrsky
A single static magnetic impurity in a fully-gapped superconductor leads to formation of an intragap quasiparticle bound state. At temperatures much below the superconducting trans…
Low-energy theory of a two-dimensional itinerant chiral magnet
Armin Rahmani, Rodrigo A. Muniz, Ivar Martin
Effective actions, such as nonlinear sigma models, are important tools in studying low-energy fluctuations of magnetically ordered states. Here we derive an effective action for th…
Anyons in integer quantum Hall magnets
Armin Rahmani, Rodrigo A. Muniz, Ivar Martin
Strongly correlated fractional quantum Hall liquids support fractional excitations, which can be understood in terms of adiabatic flux insertion arguments. A second route to fracti…
Controllable chirality-induced geometrical Hall effect in a frustrated highly-correlated metal
B. G. Ueland, C. F. Miclea, Yasuyuki Kato +11
A current of electrons traversing a landscape of localized spins possessing non-coplanar magnetic order gains a geometrical (Berry) phase which can lead to a Hall voltage independe…
Fractionalization in spontaneous integer quantum Hall systems
Rodrigo A. Muniz, Armin Rahmani, Ivar Martin
It is widely believed that integer quantum Hall systems do not have fractional excitations. Here we show the converse to be true for a class of systems where integer quantum Hall e…
Textured Superconducting State in the Heavy Fermion CeRhIn5
Tuson Park, H. lee, I. Martin +5
Anisotropic, spatially textured electronic states often emerge when the symmetry of the underlying crystalline structure is lowered. However, the possibility recently has been rais…
Stability of spontaneous quantum Hall state in the Triangular Kondo-lattice model
Yasuyuki Kato, Ivar Martin, C. D. Batista
We study the behavior of the quarter-filled Kondo lattice model on a triangular lattice by combining a zero-temperature variational approach and finite-temperature Monte-Carlo simu…
Effective Low-Energy Model for f-Electron Delocalization
K. A. Al-Hassanieh, Yi-feng Yang, Ivar Martin +1
We consider a Periodic Anderson Model (PAM) with a momentum-dependent inter-band hybridization that is strongly suppressed near the Fermi level. Under these conditions, we reduce t…
Kondo Stripes in an Anderson-Heisenberg Model of Heavy Fermion Systems
Jian-Xin Zhu, I. Martin, A. R. Bishop
We study the interplay between the spin-liquid and Kondo physics, as related to the non-magnetic part of the phase diagram of heavy fermion materials. Within the unrestricted mean-…
Pressure-induced phase transition and bi-polaronic sliding in a hole-doped Cu_2O_3 ladder system
E. Kaneshita, I. Martin, A. R. Bishop
We study a hole-doped two-leg ladder system including metal ions, oxygen, and electron-lattice interaction, as a model for Sr_{14-x}Ca_xCu_{24}O_{41-δ}. Single- and bi-polaronic st…
Local edge modes in doped cuprates with checkerboard polaronic heterogeneity
Eiji Kaneshita, Ivar Martin, Alan R. Bishop
We study a periodic polaronic system, which exhibits a nanoscale superlattice structure, as a model for hole-doped cuprates with checkerboard-like heterogeneity, as has been observ…
Vibrational edge modes in intrinsically heterogeneous doped transition metal oxides
I. Martin, E. Kaneshita, R. J. McQueeney +2
By applying an unrestricted Hartree-Fock and a Random Phase approximations to a multiband Peierls-Hubbard Hamiltonian, we study the phonon mode structure in models of transition me…
Vibrational edge modes in intrinsically inhomogeneous doped transition metal oxides
I. Martin, R. J. McQueeney, A. R. Bishop +1
By applying an unrestriced Hartree-Fock approximation and a Random Phase approximation to multiband Peierls-Hubbard Hamiltonians, we determine the phonon mode structure in models o…
Specific heat at the transition in a superconductor with fluctuating magnetic moments
Simon Kos, Ivar Martin, C. M. Varma
In the heavy-fermion materials CeCoIn and UBe, the superconducting order parameter is coupled to flucutating magnetization of the uncompensated part of the localized …
Superconductivity in a two-dimensional Electron Gas
Philip Phillips, Yi Wan, Ivar Martin +2
In a series of recent experiments, Kravchenko and colleagues observed unexpectedly that a two-dimensional electron gas in zero magnetic field can be a conductor. The two-dimensiona…
Local Pairing at U-impurities in BCS Superconductors
Ivar Martin, Philip Phillips
We analyse here the role electrons on Anderson-U impurities play in superconductivity in a metal alloy. We find that phonon coupling at impurities counteracts the traditional effec…