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pro vyhledávání: '"Pal, Hridis K"'
Autor:
Pal, Hridis K.
The conventional low-energy theory employed to describe twisted bilayer graphene (TBG) relies on a local interlayer Hamiltonian. According to this theory, TBG has the same linear-in-momentum dispersion and spinor wave function at the Dirac point as s
Externí odkaz:
http://arxiv.org/abs/2404.05025
A recent study has demonstrated that a fermionic two-leg ladder model, threaded by a flux and characterized by a spatially varying interleg hopping term, gives rise to a quasiflat low-energy band. This band exhibits an unusual ground state at half fi
Externí odkaz:
http://arxiv.org/abs/2401.00483
Autor:
Sharma, Pramod K., Banerjee, Sagnik, Dutta, Biswajit, Singhal, Vansh, Banerjee, Pushpak, Pal, Hridis K., Pal, Avradeep
Josephson diodes (JDs) offer a promising route towards realizing dissipation-less rectification at low temperatures. To be practically viable, a JD must operate at zero magnetic fields, exhibit high operating frequencies and efficiency, and possess t
Externí odkaz:
http://arxiv.org/abs/2312.04650
Autor:
Singh, Gurpreet, Pal, Hridis K.
Publikováno v:
Phys. Rev. B 108, L201103 (2023)
De Haas-van Alphen (dHvA) oscillations are oscillations in the magnetization as a function of the inverse magnetic field. These oscillations are usually considered to be a property of the Fermi surface and, hence, a metallic property. Recently, howev
Externí odkaz:
http://arxiv.org/abs/2210.10475
Publikováno v:
Phys. Rev. B 106, 245410 (2022)
We calculate the surface dc conductivity of Weyl semimetals and show that it contains an anomalous contribution in addition to a Drude contribution from the Fermi arc. The anomalous part is independent of the surface scattering time, and appears at n
Externí odkaz:
http://arxiv.org/abs/2112.14170
Autor:
Pal, Hridis K.
Publikováno v:
Phys. Rev. B 105, 075419 (2022)
Longitudinal magnetoresistance (LMR) refers to the change in resistance due to a magnetic field when the current and the magnetic field are parallel to each other. For this to be nonzero in weak magnetic fields, kinetic theory stipulates that the ele
Externí odkaz:
http://arxiv.org/abs/2107.04222
Autor:
Chakraborti, Himadri, Joshi, Bhanu P, Barman, Chanchal K., Jain, Aditya K., Pal, Buddhadeb, Barik, Bikash C., Maiti, Tanmay, Schott, Rüdiger, Prasad, M. J. N. V., Dhar, S., Pal, Hridis K., Alam, Aftab, Gupta, K. Das
Publikováno v:
Appl. Phys. Lett. 120, 132601 (2022)
A scale for magnetic field resilience of a superconductor is set by the paramagnetic limit. Comparing the condensation energy of the Bardeen-Cooper-Schrieffer (BCS) singlet ground state with the paramagnetically polarised state suggests that for an a
Externí odkaz:
http://arxiv.org/abs/2103.09590
Publikováno v:
Phys. Rev. B 103, 104517 (2021)
We show that a Weyl superconductor can absorb light via a novel surface-to-bulk mechanism, which we dub the topological anomalous skin effect. This occurs even in the absence of disorder for a single-band superconductor, and is facilitated by the top
Externí odkaz:
http://arxiv.org/abs/2011.08207
Publikováno v:
Phys. Rev. B 102, 155429 (2020)
We study the single- and many-particle properties of a two-leg ladder model threaded by a flux with the legs coupled by a spatially varying term. Although a priori unrelated to twisted bilayer graphene (TBG), the model is found to have striking simil
Externí odkaz:
http://arxiv.org/abs/2004.10325
Publikováno v:
Phys. Rev. Lett. 124, 067001 (2020)
We study the temperature dependence of the magnetic penetration depth in a 3D topological superconductor (TSC), incorporating the paramagnetic current due to the surface states. A TSC is predicted to host a gapless 2D surface Majorana fluid. In addit
Externí odkaz:
http://arxiv.org/abs/1905.07415