Zobrazeno 1 - 10
of 167
pro vyhledávání: '"Konstantin B. Efetov"'
Publikováno v:
Physical Review B. 105
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https://doi.org/10.1103/physrevb.105.155152
https://doi.org/10.1103/physrevb.105.155152
Autor:
Konstantin B. Efetov
Publikováno v:
Journal of Experimental and Theoretical Physics. 129:680-692
The concept of the order parameter is extremely useful in physics. Here, I discuss extensions of this concept to cases when the order parameter is no longer a constant but fluctuates or oscillates in space and time. This allows one to describe in an
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https://explore.openaire.eu/search/publication?articleId=doi_________::e0e7ed58f76214ec56f922d04869cd9e
https://doi.org/10.1134/s1063776119100030
https://doi.org/10.1134/s1063776119100030
Publikováno v:
Physical Review B. 103
In the context of condensed matter physics, instantons may be important for the description of quantum tunneling. However, they are typically irrelevant for the description of symmetry-broken states. Here, the authors propose a variant of the spin-fe
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https://doi.org/10.1103/physrevb.103.075121
https://doi.org/10.1103/physrevb.103.075121
Autor:
Konstantin B. Efetov
A model demonstrating existence of a thermodynamically stable quantum time-space crystal has been proposed and studied. This state is characterized by an order parameter periodic in both real and imaginary times. The average of the order parameter ov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8805e7df1e0c4cc57070cc2e0bb6228
http://arxiv.org/abs/1905.04128
http://arxiv.org/abs/1905.04128
Publikováno v:
Physical Review B
Digital.CSIC. Repositorio Institucional del CSIC
instname
Digital.CSIC. Repositorio Institucional del CSIC
instname
We study theoretically spontaneous currents and magnetic field induced in a superconductor-ferromagnet (S-F) bilayer due to direct and inverse proximity effects. There are two types of contributions to the induced currents. One is the Meissner curren
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https://doi.org/10.1103/physrevb.99.144506
https://doi.org/10.1103/physrevb.99.144506
Autor:
Pavel A. Volkov, Konstantin B. Efetov
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 29:1069-1075
Particle-hole instabilities are studied within a two dimensional model of fermions interacting with antiferromagnetic spin fluctuations (spin-fermion model). In contrast to previous works, we assume that neighboring hot spots overlap due to a shallow
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https://doi.org/10.1007/s10948-016-3372-y
https://doi.org/10.1007/s10948-016-3372-y
Autor:
Konstantin B. Efetov, Pavel A. Volkov
Publikováno v:
Physical Review B. 97
Experiments carried over the last years on the underdoped cuprates have revealed a variety of symmetry-breaking phenomena in the pseudogap state. Charge-density waves, breaking of $C_{4}$ rotational symmetry as well as time-reversal symmetry breaking
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https://doi.org/10.1103/physrevb.97.165125
https://doi.org/10.1103/physrevb.97.165125
Autor:
Dmitri K. Efetov, C. Handschin, Lei Wang, James Hone, Philip Kim, Kenji Watanabe, Konstantin B. Efetov, Cory Dean, Robert J. Cava, T. Taniguchi, J. Shuang
Publikováno v:
Nature Physics. 12:328-332
Andreev reflection occurs at the interface of a metal and a superconductor when an incident electron in the metal gets ‘reflected’ as a hole travelling on the same path. Replace the metal with graphene and specular reflection may instead take pla
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https://doi.org/10.1038/nphys3583
https://doi.org/10.1038/nphys3583
Autor:
Konstantin B. Efetov, Tigran Sedrakyan
Publikováno v:
Physical Review B. 96
Superbosonization formula aims at rigorously calculating fermionic integrals via employing supersymmetry. We derive such a supermatrix representation of superfield integrals and specify integration contours for the supermatrices. The derivation is es
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https://doi.org/10.1103/physrevb.96.054208
https://doi.org/10.1103/physrevb.96.054208
Motivated by the recent observations of small Fermi energies and comparatively large superconducting gaps, present also on bands not crossing the Fermi energy (incipient bands) in iron-based superconductors, we analyse the doping evolution of superco
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