Zobrazeno 1 - 10
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pro vyhledávání: '"Kondo insulators"'
Autor:
Pushkar, Arnav, Kumar, Brijesh
The electronic specific heat of Kondo insulators in magnetic field is studied for the half-filled Kondo lattice model on simple cubic lattice using a low-temperature theory in Kumar representation. The calculated specific heat is found to show quantu
Externí odkaz:
http://arxiv.org/abs/2408.15216
Defying the traditional classification into metals and insulators, several materials simultaneously display metallic thermal properties and insulating electric behaviour, as if they hosted quasiparticles carrying entropy but not charge. Among them, s
Externí odkaz:
http://arxiv.org/abs/2406.15143
Autor:
Kohno, Masanori
Publikováno v:
Phys. Rev. B 110, 035123 (2024)
Electronic modes emerge within the band gap at nonzero temperature in strongly correlated insulators such as Mott and Kondo insulators, exhibiting momentum-shifted magnetic dispersion relations from the band edges. As the temperature increases, the e
Externí odkaz:
http://arxiv.org/abs/2406.12310
Magnetic oscillations in strongly correlated insulating systems have garnered interest due to oscillations seemingly originating from the bulk, despite an anticipated gapped spectrum. We use the large-$N$ mean-field theory to study the behavior of no
Externí odkaz:
http://arxiv.org/abs/2402.04125
Autor:
Kohno, Masanori
Publikováno v:
Phys. Rev. B 108, 195116 (2023)
The electronic band structure can change with temperature in Mott and Kondo insulators, even without a phase transition. Here, to clarify the underlying mechanism, the spectral function at nonzero temperature is studied. By considering selection rule
Externí odkaz:
http://arxiv.org/abs/2309.05984
Autor:
Pirie, Harris, Mascot, Eric, Matt, Christian E., Liu, Yu, Chen, Pengcheng, Hamidian, M. H., Saha, Shanta, Wang, Xiangfeng, Paglione, Johnpierre, Luke, Graeme, Goldhaber-Gordon, David, Hirjibehedin, Cyrus F., Davis, J. C. Séamus, Morr, Dirk K., Hoffman, Jennifer E.
Publikováno v:
Science 379, 1214 (2023)
A Kondo lattice is often electrically insulating at low temperatures. However, several recent experiments have detected signatures of bulk metallicity within this Kondo insulating phase. Here we visualize the real-space charge landscape within a Kond
Externí odkaz:
http://arxiv.org/abs/2303.15432
Autor:
Pushkar, Arnav, Kumar, Brijesh
Publikováno v:
Phys. Rev. B 107, 035108 (2023)
The half-filled Kondo lattice model is studied at low temperatures on simple cubic lattice using the self-consistent theory developed in Phys. Rev. B 96, 075115 (2017). It is found to have three distinct insulating phases in the temperature-hopping p
Externí odkaz:
http://arxiv.org/abs/2210.01929
Autor:
Kohno, Masanori
Publikováno v:
Phys. Rev. B 105, 155134 (2022)
Heavy-fermion or Kondo lattice materials are considered to be typical strongly correlated systems, for which mean-field approximations have shown that the Coulomb interaction increases the effective mass and narrows the band gap. In this paper, to cl
Externí odkaz:
http://arxiv.org/abs/2203.14433
Autor:
Lee, Ying-Zhe, Sun, Shih-Jye
Publikováno v:
In Physica E: Low-dimensional Systems and Nanostructures September 2023 153
Kondo breakdown is one of the most intriguing problems in strongly correlated electron systems, as it is rooted in many anomalous electron behaviors found in heavy-fermion materials. In Kondo lattice systems, Kondo breakdown can arise from either str
Externí odkaz:
http://arxiv.org/abs/2110.04467