Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Baruselli, Pier Paolo"'
Autor:
Baruselli, Pier Paolo, Tosatti, Erio
Using both a resonant level model and the time-dependent Gutzwiller approximation, we study the power dissipation of a localized impurity hybridized with a conduction band when the hybridization is periodically switched on and off. The total dissipat
Externí odkaz:
http://arxiv.org/abs/1804.04999
Publikováno v:
Phys. Rev. B 96, 075113 (2017)
The onset or demise of Kondo effect in a magnetic impurity on a metal surface can be triggered, as often observed, by the simple mechanical nudging of a tip. This mechanically-driven quantum phase transition must reflect in a corresponding mechanical
Externí odkaz:
http://arxiv.org/abs/1703.06057
Autor:
Requist, Ryan, Baruselli, Pier Paolo, Smogunov, Alexander, Fabrizio, Michele, Modesti, Silvio, Tosatti, Erio
Publikováno v:
Nature Nanotech. 11, 499-508 (2016)
Scanning tunnelling microscopy and break-junction experiments realize metallic and molecular nanocontacts that act as ideal one-dimensional channels between macroscopic electrodes. Emergent nanoscale phenomena typical of these systems encompass struc
Externí odkaz:
http://arxiv.org/abs/1606.02912
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
Phys. Rev. B 93, 235111 (2016)
Cotunneling into Kondo systems, where an electron enters a $f$-electron material via a cotunneling process through the local-moment orbital, has been proposed to explain the characteristic lineshapes observed in scanning-tunneling-spectroscopy (STS)
Externí odkaz:
http://arxiv.org/abs/1603.00620
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
Phys. Rev. B 93, 195117 (2016)
Employing the $\mathbf{k}\cdot\mathbf{p}$ expansion for a family of tight-binding models for SmB$_6$, we analytically compute topological surface states on a generic $(lmn)$ surface. We show how the Dirac-cone spin structure depends on model ingredie
Externí odkaz:
http://arxiv.org/abs/1602.00852
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
2D Mater. 2 044011 (2015)
For the strongly correlated topological insulator SmB6 we discuss the influence of a 2x1 reconstruction of the (001) surface on the topological surface states. Depending on microscopic details, the reconstruction can be a weak or a strong perturbatio
Externí odkaz:
http://arxiv.org/abs/1509.04426
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
Phys. Rev. Lett. 115, 156404 (2015)
SmB6 was recently proposed to be both a strong topological insulator and a topological crystalline insulator. For this and related cubic topological Kondo insulators, we prove the existence of four different topological phases, distinguished by the s
Externí odkaz:
http://arxiv.org/abs/1505.03507
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
Phys. Rev. B 90, 201106 (2014)
SmB6 is one of the candidate compounds for topological Kondo insulators, a class of materials which combines a non-trivial topological band structure with strong electronic correlations. Here we employ a multiband tight-binding description, supplemen
Externí odkaz:
http://arxiv.org/abs/1409.6722
Autor:
Baruselli, Pier Paolo, Vojta, Matthias
Publikováno v:
Phys Rev B 89, 205105 (2014)
A fascinating type of symmetry-protected topological states of matter are topological Kondo insulators, where insulating behavior arises from Kondo screening of localized moments via conduction electrons, and non-trivial topology emerges from the str
Externí odkaz:
http://arxiv.org/abs/1403.3566
Publikováno v:
Physical Review B 88, 245426 (2013)
Low-temperature electronic conductance in nanocontacts, scanning tunneling microscopy (STM), and metal break junctions involving magnetic atoms or molecules is a growing area with important unsolved theoretical problems. While the detailed relationsh
Externí odkaz:
http://arxiv.org/abs/1401.1392