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The interplay of magnetism and superconductivity can lead to intriguing emergent phenomena. Here we combine two different two-dimensional antiferromagnetic magnet-superconductor hybrids (MSH) and study their properties using spin-polarized…

The efficient generation and control of spin polarization via charge-spin conversion in topological semimetals are desirable for future spintronic and quantum technologies. Here, we report the charge-spin conversion (CSC) signals measured…

Mesoscale and Nanoscale Physics · Physics 2021-02-03 Bing Zhao , Anamul Md. Hoque , Dmitrii Khokhriakov , Bogdan Karpiak , Saroj P. Dash

Collective dynamics of topological magnetic textures can be thought of as a massive particle moving in a magnetic pinning potential. We demonstrate that inside a cavity resonator this effective mechanical system can feel the electromagnetic…

Mesoscale and Nanoscale Physics · Physics 2019-01-09 Igor Proskurin , Alexander S. Ovchinnikov , Jun-ichiro Kishine , Robert L. Stamps

We report that spin supercurrents in magnetic superconductors and superconductor/ferromagnetic insulator bilayers can induce the Dzyaloshinskii-Moriya interaction which strength is proportional to the superconducting order parameter…

Superconductivity · Physics 2021-08-23 M. A. Silaev , D. S. Rabinovich , I. V. Bobkova

We experimentally study the tunability of the cooperativity in coupled spin--cavity systems by changing the magnetic state of the spin system via an external control parameter. As model system, we use the skyrmion host material…

Quasi-2D van der Waals ferromagnet Fe$_4$GeTe$_2$, featuring the simultaneous presence of high Curie temperature ($T_\mathrm{C}$ $\sim 270$ K) and a spin-reorientation transition at $T_\mathrm{SR}$ $\sim 110$ K, is a rare system where…

Moir\'e excitons are emergent optical excitations in 2D semiconductors with deep moir\'e superlattice potentials. While these excitations have been realized in several platforms, a system with dynamically tunable moir\'e potential to tailor…

In the presence of spin-orbit coupling (SOC), achieving both spin and valley polarized Dirac state is significant to promote the fantastic integration of Dirac physics, spintronics and valleytronics. Based on ab initio calculations, here we…

Computational Physics · Physics 2018-12-04 Zhifeng Liu , Wangxiang Feng , Hongli Xin , Yinlu Gao , Pengfei Liu , Yugui Yao , Hongming Weng , Jijun Zhao

Moir\'e semiconductors offer flat bands where Coulomb interactions and band topology intertwine, while interlayer coupling plays a central role in forming the moir\'e potential. However, limited interlayer coupling strength and the lack of…

A panoply of unconventional electronic states has been observed in moir\'e superlattices. Engineering similar bosonic phases remains, however, largely unexplored. We report the observation of a bosonic correlated insulator in WSe2/WS2…

The mechanism of the unconventional topological superconductivity (TSC) remains a long-standing issue. We investigate the quantum phase diagram of the extended $t$-$J$-$J_{\chi}$ model including spin chiral interactions on triangular…

Strongly Correlated Electrons · Physics 2022-07-18 Yixuan Huang , D. N. Sheng

Semiconductor moir\'e superlattices have been shown to host a wide array of interaction-driven ground states. However, twisted homobilayers have been difficult to study in the limit of large moir\'e wavelength, where interactions are most…

Moir\'e superlattices in twisted van der Waals materials constitute a promising platform for engineering electronic and optical properties. However, a major obstacle to fully understanding these systems and harnessing their potential is the…

Heterostructure interface provides a powerful platform to observe rich emergent phenomena, such as interfacial superconductivity, nontrivial topological surface state. Here SrRuO3/SrIrO3 superlattices were epitaxially synthesized. The…

Materials Science · Physics 2017-01-17 Bin Pang , Lunyong Zhang , Y. B Chen , Jian Zhou , Shuhua Yao , Shantao Zhang , Yanfeng Chen

Moir\'e systems provide a highly tunable platform for engineering band structures and exotic correlated phases. Here, we theoretically study a model for a single layer of graphene subject to a smooth moir\'e electrostatic potential, induced…

Strongly Correlated Electrons · Physics 2023-06-30 Jeyong Park , Lasse Gresista , Simon Trebst , Achim Rosch , Jinhong Park

We investigate the spin rotational structure of magnetic skyrmions in a tetragonal polar magnet VOSe2O5 via polarized small-angle neutron scattering (SANS). Spin polarization analysis of the scattered neutrons provides consistent evidence…

Strongly Correlated Electrons · Physics 2021-01-19 T. Kurumaji , T. Nakajima , A. Feoktystov , E. Babcock , Z. Salhi , V. Ukleev , T. Arima , K. Kakurai , Y. Tokura

Chiral spin-triplet superconductivity is a topologically nontrivial pairing state with broken time-reversal symmetry, which can host Majorana quasiparticles. The recently discovered heavy-fermion superconductor UTe$_2$ exhibits peculiar…

Superconductivity · Physics 2023-05-25 K. Ishihara , M. Roppongi , M. Kobayashi , Y. Mizukami , H. Sakai , Y. Haga , K. Hashimoto , T. Shibauchi

Surface properties are examined in a chiral d-wave superconductor with hexagonal symmetry, whose one-body Hamiltonian possesses the intrinsic spin-orbit coupling identical to the one characterizing the topological nature of the Kane-Mele…

Superconductivity · Physics 2017-10-11 Jun Goryo , Yoshiki Imai , W. B. Rui , Manfred Sigrist , Andreas P. Schnyder

The metal-insulator transition (MIT) driven by electronic correlations is a fundamental and challenging problem in condensed-matter physics. Particularly, whether such a transition can be continuous remains open. The emergence of…

Materials Science · Physics 2022-08-24 Yanhao Tang , Jie Gu , Song Liu , Kenji Watanabe , Takashi Taniguchi , James C. Hone , Kin Fai Mak , Jie Shan

A Fermi-liquid (FL) with spin-orbit coupling (SOC) supports a special type of collective modes--chiral spin waves--which are oscillations of magnetization even in the absence of the external magnetic field. We study the chiral spin waves of…

Mesoscale and Nanoscale Physics · Physics 2017-05-03 Abhishek Kumar , Dmitrii L. Maslov