curtis, macauley gradhand, martin annett, james f.
Uniaxial strain in the (100) direction has the effect of increasing the superconducting Tc in Sr2RuO4 from 1.5 K to over 3 K. The enhanced Tc corresponds to a Lifshitz transition in the Fermi surface topology of this unconventional superconductor. We model this using a simple two-dimensional one-band model for the γ sheet of the Fermi surface. This...
campi, gaetano logvenov, gennady caprara, sergio valletta, antonio bianconi, antonio
Recently, the quest for high-Tc superconductors has evolved from the trial-and-error methodology to the growth of nanostructured artificial high-Tc superlattices (AHTSs) with tailor-made superconducting functional properties by quantum design. Here, we report the growth by molecular beam epitaxy (MBE) of a superlattice of Mott insulator metal inter...
Makhdoumi Kakhaki, Z Martinelli, A Avitabile, F Di Bernardo, A Attanasio, C Cirillo, C
Published in
Superconductor Science and Technology
NbxRe1−x is a non-centrosymmetric superconductor recently realized in thin film form. The access to the basic physics that governs this material is hindered by the polycrystalline structure of the films which consist of grains of small dimensions. In these conditions, films are not decisive in revealing the nature of the superconducting order param...
Gervalle, Romain Volkov, Mikhail S.
We construct static and axially symmetric magnetically charged hairy black holes in the gravity-coupled Weinberg-Salam theory. Large black holes merge with the Reissner-Nordstr\"om (RN) family, while the small ones are extremal and support a hair in the form of a ring-shaped electroweak condensate carrying superconducting W-currents and up to $22\%...
Qin, Yanqing Song, Jiexi Chen, Xinyu Shi, Diwei Yang, Fuqiang Cao, Chongde
Published in
Physica Scripta
To investigate potential compounds that may emerge in actinium borides at high-pressure conditions. In this work, we carried out systematic crystal structure search procedure on the Ac-B compounds from 0 to 300 GPa conditions based on evolutionary algorithms and density functional theory (DFT). We discovered a stable phase Pm_3m-AcB6 at 0 GPa with ...
Chen, Shiya Zheng, Feng Zhang, Zhen Wu, Shunqing Ho, Kai-Ming Antropov, Vladimir Sun, Yang
Published in
Journal of Physics: Condensed Matter
The search for room-temperature superconductors is a major challenge in modern physics. The discovery of copper-oxide superconductors in 1986 brought hope but also revealed complex mechanisms that are difficult to analyze and compute. In contrast, the traditional electron–phonon coupling (EPC) mechanism facilitated the practical realization of supe...
Fernández-Lomana, Marta Aguilera, Paula Obladen Wu, Beilun Herrera, Edwin Suderow, Hermann Guillamón, Isabel
Published in
Journal of Physics: Condensed Matter
We provide the superconducting density of states of the pnictide superconductor LaRu2P2 (Tc = 4.1 K), measured using millikelvin scanning tunneling microscopy. From the tunneling conductance, we extract a density of states which shows the opening of a s-wave single superconducting gap. The temperature dependence of the gap also follows BCS theory. ...
Antola, F Braggio, A De Simoni, G Giazotto, F
Published in
Superconductor Science and Technology
Efficient heat management at cryogenic temperatures is crucial for superconducting quantum technologies. This study demonstrates the controlled manipulation of the heat flow and heat rectification through an asymmetric superconducting tunnel junction. The system exhibits a non-reciprocal behavior, developing a thermoelectric regime exclusively when...
Rehman, Habeeb-ur- Shahbaz, Muhammad Afaq, A
Published in
Physica Scripta
We studied the dynamical, electronic, and superconducting properties of LaO using a local (PZ), a semilocal (PBE), and three nonlocal correlation functionals (rVV10, vdW-DF2, and vdW-DF3) of the density-functional theory. We concluded that the nonlocal correlations have a marginal effect on the electronic band energies near the Fermi surface. Howev...
skog, aiste hovhannisyan, razmik a. krasnov, vladimir m.
The lack of dense random-access memory is one of the main obstacles to the development of digital superconducting computers. It has been suggested that AVRAM cells, based on the storage of a single Abrikosov vortex—the smallest quantized object in superconductors—can enable drastic miniaturization to the nanometer scale. In this work, we present th...