Article
Materials Science, Multidisciplinary
Gianmichele Blasi, Fabio Taddei, Liliana Arrachea, Matteo Carrega, Alessandro Braggio
Summary: The study thoroughly investigates the thermoelectric performance of a topological Josephson nonlocal heat engine, exploring how different triggers affect the nonlocal thermoelectric effects and considering possible experimental nonidealities. It discusses the interplay between Doppler shift and Andreev interferometry for different operating regimes, and highlights high nonlocal Seebeck coefficients that could be detectable even against spurious local effects.
Article
Materials Science, Multidisciplinary
V. Fernandez Becerra, Mircea Trif, Timo Hyart
Summary: Spin pumping involves injecting spin currents into a nonmagnetic material due to the precession of a neighboring ferromagnet, resulting in quantized and interconnected charge, spin, and heat pumping in a device with topological effects. The interplay of two topological effects, including topologically protected perfect Andreev reflection, allows the device to operate as a robust charge, spin, and heat transistor.
Article
Materials Science, Multidisciplinary
Hiroyuki Tajima, Yuta Sekino, Shun Uchino
Summary: In this study, we theoretically investigate the optical spin transport properties in a topological Fermi superfluid, considering a one-dimensional system with an interspin p-wave interaction. Our findings reveal that the optical spin conductivity exhibits a spin-gapped spectrum in a wide parameter range and the gap closes at the Z(2) topological phase transition point.
Article
Materials Science, Multidisciplinary
Jingyu Li, Muchun Guo, Jianguo Si, Lanting Shi, Xianbiao Shi, Jiang-Jiang Ma, Qinyong Zhang, David J. Singh, Peng-Fei Liu, Bao-Tian Wang
Summary: By using first-principles calculations, we have theoretically found that α- and fl-beryllenes exhibit two-dimensional superconductivity and Dirac bands. These materials have different electronic structures, Fermi surfaces, and critical temperatures, which are attributed to their structural differences and substitution of heavier group-II atoms.
MATERIALS TODAY PHYSICS
(2023)
Article
Physics, Condensed Matter
Shigeru Koikegami
Summary: This study investigates the superconductivity of a three-band t-J-U model derived from the three-band Hubbard model, considering the hole-doped high-T-c superconducting cuprate. Results show that superconductivity arises due to pair-hopping and exchange interactions via the Suhl-Kondo mechanism, leading to the coexistence of extended s- and d(x2-y2)-wave superconducting gaps in the superconducting state. Charge fluctuations and d-p band hybridization are identified as key factors in this phenomenon.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Multidisciplinary Sciences
T. Kamppinen, J. Rysti, M. M. Volard, G. E. Volovik, V. B. Eltsov
Summary: Recent studies have shown that unconventional superconductors can become stable under the influence of impurities if the impurity scattering only mixes quasiparticle states within individual subsystems. In this article, the authors experimentally verify this hypothesis by measuring the temperature dependence of the energy gap in the polar phase of superfluid He-3. The results indicate that oriented columnar non-magnetic defects do not significantly modify the energy spectrum, preserving the momentum along the length of the columns and forming robust subsystems according to the hypothesis. This finding may stimulate further research on the protection of topological superconductivity against disorder and the nature of topological fermionic flat bands.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
John M. Tranquada
Summary: Doping into a correlated antiferromagnet can lead to topological stripe correlations between charge and spin stripes, with the possibility of a pair-density-wave order being experimentally confirmed in cuprates. This provides a basis for understanding the more typical d-wave order in superconducting cuprates.
Article
Physics, Multidisciplinary
GiBaik Sim, Moon Jip Park, SungBin Lee
Summary: This study theoretically reports a triple point semimetal that stabilizes an s-wave spin-triplet pairing through triple point fermions. The research provides guidance in searching for spin-triplet superconductivity.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Bo Zheng, Xukun Feng, Bo Liu, Zhanfeng Liu, Shasha Wang, Ying Zhang, Xiang Ma, Yang Luo, Changlong Wang, Ruimin Li, Zeying Zhang, Shengtao Cui, Yalin Lu, Zhe Sun, Junfeng He, Shengyuan A. Yang, Bin Xiang
Summary: This paper reports the first experimental synthesis and measurement of high-quality single crystal van der Waals transition-metal dichalcogenide InNbS2, revealing it as a topological nodal line semimetal with coexisting superconductivity. First-principles calculations predict similar features in the as-synthesized BiNbS2 and PbNbS2 samples.
Article
Physics, Multidisciplinary
Zhejunyu Jin, Xianglong Yao, Zhenyu Wang, H. Y. Yuan, Zhaozhuo Zeng, Weiwei Wang, Yunshan Cao, Peng Yan
Summary: It has been discovered that hidden nonlinear magnon transport in magnetic textures can generate fictitious magnetic fields. By analyzing the scattering features between magnons and skyrmions, a significant Hall angle in both confluence and splitting modes has been predicted, and it has been found that the Hall angle reverses its sign when switching the handedness of the incident magnons. This finding may open up new possibilities for probing gauge fields through nonlinear means.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Merce Roig, Astrid T. Romer, P. J. Hirschfeld, Brian M. Andersen
Summary: The superconducting instabilities of the 2D extended repulsive one-band Hubbard model depend on electron density, band, and interaction parameters. The results show that different pairing symmetries dominate in the absence or presence of repulsive longer-range Coulomb interactions.
Article
Multidisciplinary Sciences
Martin Claassen, Lede Xian, Dante M. Kennes, Angel Rubio
Summary: The study predicts that twisted bilayers of ZrS2 with the group-IV metal Zr can form an emergent moire Kagome lattice with strong spin-orbit coupling, leading to novel topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS2 heterostructures give rise to an emergent and twist-controlled moire Kagome lattice, combining geometric frustration and strong spin-orbit coupling to realize a moire quantum spin Hall insulator with highly controllable and nearly-dispersionless bands.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoming Zhang, Jiale Liu, Feng Liu
Summary: This study generalizes the effective p-wave theory to antisymmetric SOC (ASOC) and demonstrates that various 2D crystals can facilitate the desired ASOC. 314 TSC candidate materials are discovered by screening 2D material databases.
Article
Materials Science, Multidisciplinary
E. K. Petrov, V. N. Men'shov, I. P. Rusinov, M. Hoffmann, A. Ernst, M. M. Otrokov, V. K. Dugaev, T. Menshchikova, E. Chulkov
Summary: This paper suggests a method to realize topologically protected spin-polarized flat bands generated by domain walls in planar magnetic topological insulators, demonstrating their existence near the Fermi level and discussing their potential applications in intrinsic antiferromagnetic topological insulators.
Article
Physics, Multidisciplinary
Seher Karakuzu, Andy Tanjaroon Ly, Peizhi Mai, James Neuhaus, Thomas A. Maier, Steven Johnston
Summary: This study investigates stripe orders in the doped single-band Hubbard-Holstein model and finds that the lattice couples more strongly with the charge component of the stripes, leading to an enhancement or suppression of stripe correlations depending on model parameters. This has implications for our understanding of high-Tc cuprates.
COMMUNICATIONS PHYSICS
(2022)
