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A magnetic-field-driven transition from metallic- to semiconducting-type behavior in the basal-plane resistance takes place in highly oriented pyrolytic graphite at a field $H_c \sim 1~$kOe applied along the hexagonal c-axis. The analysis…

Strongly Correlated Electrons · Physics 2009-10-31 H. Kempa , Y. Kopelevich , F. Mrowka , A. Setzer , J. H. S. Torres , R. Höhne , P. Esquinazi

We present a holographic theory in AdS_4 whose zero temperature ground state develops a crystal structure, spontaneously breaking translational symmetry. The crystal is induced by a background magnetic field, but requires no chemical…

High Energy Physics - Theory · Physics 2011-02-03 Stefano Bolognesi , David Tong

Droplet solitons are a strongly nonlinear, inherently dynamic structure in the magnetization of ferromagnets, balancing dispersion (exchange energy) with focusing nonlinearity (strong perpendicular anisotropy). Large droplet solitons have…

Pattern Formation and Solitons · Physics 2015-06-29 L. D. Bookman , M. A. Hoefer

We perform the potential analysis for the holographic Schwinger effect in a deformed $AdS_5$ model with conformal invariance broken by a background dilaton. We evaluate the static potential by analyzing the classical action of a string…

High Energy Physics - Theory · Physics 2021-02-03 Yue Ding , Zi-qiang Zhang

We study the Wilson line response in the holographic superconducting phase transitions in Gauss-Bonnet gravity. In the black brane background case, the Little-Parks periodicity is independent of the Gauss-Bonnet parameter, while in the AdS…

High Energy Physics - Theory · Physics 2015-06-11 Rong-Gen Cai , Li Li , Li-Fang Li , Hai-Qing Zhang , Yun-Long Zhang

We investigate the interplay of in-plane magnetic and transverse electric fields in AB-stacked bilayer graphene. In prior work, we demonstrated that this configuration induces an insulator-metal (IM) transition with large impact on the…

Mesoscale and Nanoscale Physics · Physics 2026-03-27 Amarnath Chakraborty , Aleksandr Rodin , Shaffique Adam , Giovanni Vignale

We study the scalar condensation of a general holographic superconductor model in AdS black hole background away from the probe limit. We find the model parameters together with the scalar mass and backreaction can determine the order of…

High Energy Physics - Theory · Physics 2015-03-04 Yan Peng , Yunqi Liu

We have studied the extended Hubbard model with pair hopping in the atomic limit for arbitrary electron density and chemical potential and focus on paramagnetic effects of the external magnetic field. The Hamiltonian considered consists of…

Strongly Correlated Electrons · Physics 2013-01-22 Konrad Kapcia , Stanisław Robaszkiewicz

Recently introduced magnetic materials called altermagnets (AM) feature zero net magnetization but a momentum dependent magnetic exchange field, which can have intriguing implications when combined with superconductivity. In our work, we…

Superconductivity · Physics 2025-06-13 Simran Chourasia , Aleksandr Svetogorov , Akashdeep Kamra , Wolfgang Belzig

We re-investigate the holographic superconductor in hyperscaling violation geometry by considering the coupling between the probed Maxwell field and the background dilaton. We find that the phenomenon of superconductivity still exists, but…

High Energy Physics - Theory · Physics 2016-02-09 Shao-Jun Zhang , Qiyuan Pan , Elcio Abdalla

We continue our study of entanglement entropy in the holographic superconducting phase transitions. In this paper we consider the holographic p-wave superconductor/insulator model, where as the back reaction increases, the transition is…

High Energy Physics - Theory · Physics 2014-01-24 Rong-Gen Cai , Li Li , Li-Fang Li , Ru-Keng Su

Based on the shooting method, we numerically investigate the properties of holographic paramagnetism-ferromagnetism phase transition in the presence of higher order Gauss-Bonnet (\emph{GB}) correction terms on the gravity side. On the…

High Energy Physics - Theory · Physics 2021-07-27 B. Binaei Ghotbabadi , A. Sheykhi , G. H. Bordbar , A. Montakhab

In this work, we formulate a Non-Commutative (NC) extension of AdS-CFT correspondence that is manifested in the modification of behavior of a holographic superconductor. The noncommutativity is introduced in the model through the NC…

High Energy Physics - Theory · Physics 2018-12-12 Souvik Pramanik , Subir Ghosh

We employ the numerical and analytical methods to study the effects of the hyperscaling violation on the ground and excited states of holographic superconductors for $d=2,~z=2$. For both the holographic s-wave and p-wave models with the…

High Energy Physics - Theory · Physics 2022-02-23 Shuhang Zhang , Zixu Zhao , Qiyuan Pan , Jiliang Jing

We studied experimentally the effect of a stripe-like domain structure in a ferromagnetic BaFe_{12}O_{19} substrate on the magnetoresistance of a superconducting Pb microbridge. The system was designed in such a way that the bridge is…

We study the effects of an external magnetic field on the properties of the quasiparticle spectrum of the class of 2+1 dimensional strongly coupled theories holographically dual to charged AdS$_4$ black holes at zero temperature. We uncover…

High Energy Physics - Theory · Physics 2014-11-20 Tameem Albash , Clifford V. Johnson

We observed a slow relaxation of magnetoresistance in response to applied magnetic field in selectively doped p-GaAs-AlGaAs structures with partially filled upper Hubbard band. We have paid a special attention to exclude the effects related…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 N. V. Agrinskaya , V. I. Kozub , D. V. Shamshur , A. V. Shumilin , Y. M. Galperin

We analytically as well as numerically disclose the effects of the higher order correction terms in the gravity and in the gauge field on the properties of $s$-wave holographic superconductors. On the gravity side, we consider the higher…

High Energy Physics - Theory · Physics 2018-02-27 Ahmad Sheykhi , Afsoon Ghazanfari , Amin Dehyadegari

We build a holographic $s$-wave conductor/superconductor model and an insulator/superconductor model in the four-dimensional conformal anomaly corrected~(CAC) AdS gravity. The effects of CAC parameter $\alpha$ are studied using both…

High Energy Physics - Theory · Physics 2020-06-15 Jun-Wang Lu , Huai-Fan Li , Ya-Bo Wu

We determine the magnetic field dependence of the pseudogap closing temperature T* within a precursor superconductivity scenario. Detailed calculations with an anisotropic attractive Hubbard model account for a recently determined…

Superconductivity · Physics 2009-11-07 P. Pieri , G. C. Strinati , D. Moroni