Zobrazeno 1 - 10
of 320
pro vyhledávání: '"Ulloa, Sergio"'
Autor:
Castorene, Bastian, Peña, Francisco J., Norambuena, Ariel, Ulloa, Sergio E., Araya, Cristobal, Vargas, Patricio
This work investigates a system of three entangled qubits within the XXX model, subjected to an external magnetic field in the $z$-direction and incorporating an anisotropy term along the $y$-axis. We explore the thermodynamics of the system by calcu
Externí odkaz:
http://arxiv.org/abs/2410.16133
Autor:
Dandu, Naveen K., Lee, Alex Taekyung, Ulloa, Sergio, Curtiss, Larry, Hla, Saw Wai, Ngo, Anh T.
In this work, we systematically study the electronic structure and stability of spin states of the [Fe-(tpy-ph)$_2$]$^{2+}$ molecule in both gas phase and on a Au(111) substrate using density functional theory +U (DFT+U) calculations. We find that th
Externí odkaz:
http://arxiv.org/abs/2408.07014
Autor:
Mojarro, M. A., Ulloa, Sergio E.
We study the interplay of attractive electron interactions and topological states in strained kagome lattices with spin-orbit coupling via a Hubbard Hamiltonian in the mean-field approximation. In the unstrained lattice, there is a topological phase
Externí odkaz:
http://arxiv.org/abs/2406.15984
Autor:
Castorene, Bastian, Peña, Francisco J., Norambuena, Ariel, Ulloa, Sergio E., Araya, Cristobal, Vargas, Patricio
This study investigates the anisotropic effects on a system of three qubits with chain and ring topology, described by the antiferromagnetic Heisenberg XXX model subjected to a homogeneous magnetic field. We explore the Stirling and Otto cycles and f
Externí odkaz:
http://arxiv.org/abs/2405.12339
Autor:
Mojarro, M. A., Ulloa, Sergio E.
Publikováno v:
2D Mater. 11 (2024) 011001
We study effects of strain on the electronic properties of the kagome lattice in a tight-binding formalism with spin-orbit coupling (SOC). The degeneracy at the $\Gamma$ point evolves into a pair of emergent tilted Dirac cones under uniaxial strain,
Externí odkaz:
http://arxiv.org/abs/2303.00124
Autor:
Facemyer, David W., Dandu, Naveen K., Lee, Alex Taekyung, Singh, Vijay R., Ngo, Anh T., Ulloa, Sergio E.
High spin systems, like those that incorporate rare-earth $4f$ elements (REEs), are increasingly relevant in many fields. Although research in such systems is sparse, the large Hilbert spaces they occupy are promising for many applications. In this w
Externí odkaz:
http://arxiv.org/abs/2212.08772
Superconductivity in graphene-based systems has recently attracted much attention, as either intrinsic behavior or induced by proximity to a superconductor may lead to interesting topological phases and symmetries of the pairing function. A prominent
Externí odkaz:
http://arxiv.org/abs/2107.03169
Publikováno v:
J. Phys.: Condens. Matter 31, 213001 (2019)
The growth and exfoliation of two-dimensional (2D) materials have led to the creation of edges and novel interfacial states at the juncture between crystals with different composition or phases. These hybrid heterostructures (HSs) can be built as ver
Externí odkaz:
http://arxiv.org/abs/1901.04931
Publikováno v:
Phys. Rev. B 99, 035107 (2019)
We study in-plane lateral heterostructures of commensurate transition-metal dichalcogenides, such as MoS$_{2}$-WS$_{2}$ and MoSe$_{2}$-WSe$_{2}$, and find interfacial and edge states that are highly localized to these regions of the heterostructure.
Externí odkaz:
http://arxiv.org/abs/1808.09402
Publikováno v:
Phys. Rev. B 99, 195410 (2019)
Kondo physics in doped monolayer graphene is predicted to exhibit unusual features due to the linear vanishing of the pristine material's density of states at the Dirac point. Despite several attempts, conclusive experimental observation of the pheno
Externí odkaz:
http://arxiv.org/abs/1808.08285