Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Dwivedi, Vatsal"'
A two-dimensional second-order topological insulator exhibits topologically protected zero-energy states at its corners. In the literature, the breathing kagome lattice with nearest-neighbor hopping is often mentioned as an example of a two-dimension
Externí odkaz:
http://arxiv.org/abs/2412.20460
Publikováno v:
Phys. Rev. B 110, 035116 (2024)
Fermi-arc surface states of Weyl semimetals exhibit a unique combination of localization to a surface and connectivity to the bulk Weyl fermions that can move along the localization direction. We predict anomalous quantum-oscillation signatures of Fe
Externí odkaz:
http://arxiv.org/abs/2310.19720
Autor:
Brouwer, Piet W., Dwivedi, Vatsal
The topological classification of gapped band structures depends on the particular definition of topological equivalence. For translation-invariant systems, stable equivalence is defined by a lack of restrictions on the numbers of occupied and unoccu
Externí odkaz:
http://arxiv.org/abs/2306.13713
Publikováno v:
Phys. Rev. B 107, L241109 (2023)
We investigate magnetotransport across an interface between two Weyl semimetals whose Weyl nodes project onto different interface momenta. Such an interface generically hosts Fermi arcs that connect Weyl nodes of identical chirality in different Weyl
Externí odkaz:
http://arxiv.org/abs/2302.09896
Publikováno v:
Phys. Rev. Research 2, 043159 (2020)
In frustrated quantum magnetism, chiral spin liquids are a particularly intriguing subset of quantum spin liquids in which the fractionalized parton degrees of freedom form a Chern insulator. Here we study an exactly solvable spin-3/2 model which har
Externí odkaz:
http://arxiv.org/abs/2007.04332
Autor:
Dwivedi, Vatsal, Klevtsov, Semyon
Publikováno v:
Phys. Rev. B 99, 205158 (2019)
We define and study the Pfaffian state on Riemann surfaces with arbitrary metrics and an inhomogeneous magnetic field and derive its universal transport coefficients. Following a path integral approach, we compute the generating functional which enco
Externí odkaz:
http://arxiv.org/abs/1902.09563
Autor:
Kunst, Flore K., Dwivedi, Vatsal
Publikováno v:
Phys. Rev. B 99, 245116 (2019)
Topological phases of Hermitian systems are known to exhibit intriguing properties such as the presence of robust boundary states and the famed bulk-boundary correspondence. These features can change drastically for their non-Hermitian generalization
Externí odkaz:
http://arxiv.org/abs/1812.02186
Publikováno v:
Phys. Rev. B 98, 054432 (2018)
Higher-order topological insulators are distinguished by the existence of topologically protected modes with codimension two or higher. Here, we report the manifestation of a second-order topological insulator in a two dimensional frustrated quantum
Externí odkaz:
http://arxiv.org/abs/1803.08922
Autor:
Dwivedi, Vatsal, Chua, Victor
We generalize the position- and momentum-space entanglement cuts to a family of cuts corresponding to regions in the classical phase space. We explicitly compute the entanglement spectra of free fermionic many-body wavefunctions for a family of phase
Externí odkaz:
http://arxiv.org/abs/1802.09531
Autor:
Dwivedi, Vatsal
Publikováno v:
Phys. Rev. B 97, 064201 (2018)
We analyze junctions between noninteracting fermionic topological phases. A closed-form condition for the existence of localized modes at the interface is derived using the transfer matrix approach. These analytical conditions as well as numerical ex
Externí odkaz:
http://arxiv.org/abs/1711.06285