Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Nozadze, David"'
We explore the temperature effects in the superconducting phases of a hybridized two-band system. We show that for zero hybridization between the bands, there are two different critical temperatures. However, for any finite hybridization there are on
Externí odkaz:
http://arxiv.org/abs/1711.10068
Publikováno v:
Annals of Physics, v. 384, p. 211-224, 2017
In this paper we study the effects of hybridization in the superconducting properties of a two-band system. We consider the cases that these bands are formed by electronic orbitals with angular momentum, such that, the hybridization $V(\mathbf{k})$ a
Externí odkaz:
http://arxiv.org/abs/1707.01977
Autor:
Nozadze, David, Trivedi, Nandini
Publikováno v:
Phys. Rev. B 93, 064512 (2016)
The non-Abelian statistics of Majorana fermions, their role in topological quantum computation, and the possibility of realizing them in condensed matter systems, has attracted considerable attention. While there have been recent reports of zero ener
Externí odkaz:
http://arxiv.org/abs/1504.00013
We study a two-band model of fermions in a 1d chain with an antisymmetric hybridization that breaks inversion symmetry. We find that for certain values of its parameters, the $sp$-chain maps formally into a $p$-wave superconducting chain, the archety
Externí odkaz:
http://arxiv.org/abs/1405.4183
Publikováno v:
Phys. Rev. E 89, 012112 (2014)
We study the nonequilibrium phase transition of the contact process with aperiodic transition rates using a real-space renormalization group as well as Monte-Carlo simulations. The transition rates are modulated according to the generalized Fibonacci
Externí odkaz:
http://arxiv.org/abs/1310.2976
Autor:
Nozadze, David, Vojta, Thomas
Publikováno v:
Phys. Stat. Sol. B 251, 675 (2014)
We develop an efficient numerical method to study the quantum critical behavior of disordered systems with $\mathcal{O}(N)$ order-parameter symmetry in the large$-N$ limit. It is based on the iterative solution of the large$-N$ saddle-point equations
Externí odkaz:
http://arxiv.org/abs/1302.5839
Phase transitions in disordered systems can be smeared if rare spatial regions develop true static order while the bulk system is in the disordered phase. Here, we study the effects of spatial disorder correlations on such smeared phase transitions.
Externí odkaz:
http://arxiv.org/abs/1212.5962
Autor:
Nozadze, David, Vojta, Thomas
Publikováno v:
Phys. Rev. B 85, 174202 (2012)
We present a theory of the quantum Griffiths phases associated with the ferromagnetic quantum phase transition in disordered metals. For Ising spin symmetry, we study the dynamics of a single rare region within the variational instanton approach. For
Externí odkaz:
http://arxiv.org/abs/1202.5562
Autor:
Nozadze, David, Vojta, Thomas
We use the semi-classical Boltzmann equation to investigate transport properties such as electrical resistivity, thermal resistivity, thermopower, and the Peltier coefficient of disordered metals close to an antiferromagnetic quantum phase transition
Externí odkaz:
http://arxiv.org/abs/1110.3093
Publikováno v:
Europhysics Letters 97, 20007 (2012)
We investigate the influence of spatial disorder correlations on smeared phase transitions, taking the quantum phase transition in itinerant magnets as an example. We find that even short-range correlations can have a dramatic effect and qualitativel
Externí odkaz:
http://arxiv.org/abs/1109.4290