Exciton-driven renormalization of quasiparticle band structure in monolayer ${\mathrm{MoS}}_{2}$

Author(s): Yi Lin, Yang-hao Chan, Woojoo Lee, Li-Syuan Lu, Zhenglu Li, Wen-Hao Chang, Chih-Kang Shih, Robert A. Kaindl, Steven G. Louie, and Alessandra LanzaraOptical excitation serves as a powerful approach to control the electronic structure of layered van der Waals materials via many-body screening effects, induced by photoexcited free carriers,...

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Frustrated magnetic interactions in FeSe

Author(s): Yiqing Gu, Qisi Wang, Hongliang Wo, Zheng He, Helen C. Walker, Jitae T. Park, Mechthild Enderle, Andrew D. Christianson, Wenbin Wang, and Jun ZhaoThe structurally simplest high-temperature superconductor FeSe exhibits an intriguing superconducting nematic paramagnetic phase with unusual spin excitation spectra that are different from typical...

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Probing Majorana bound states via a $pn$ junction containing a quantum dot

Author(s): L. Bittermann, C. De Beule, D. Frombach, and P. RecherWe propose an alternative route to transport experiments for detecting Majorana bound states (MBSs) by combining topological superconductivity with quantum optics in a superconducting pn junction containing a quantum dot (QD). We consider a topological superconductor (TSC) hosting two...

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Order, disorder, and monopole confinement in the spin-$\frac{1}{2}$ XXZ model on a pyrochlore tube

Author(s): Chunhan Feng, Alexander Wietek, E. Miles Stoudenmire, and Rajiv R. P. SinghWe study the ground state and thermodynamic properties of the spin-half XXZ model, with an Ising interaction Jz and a transverse exchange interaction Jx, on a pyrochlore tube obtained by joining together elementary cubes in a one-dimensional array. Periodic boundary...

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Theory of silicon spin qubit relaxation in a synthetic spin-orbit field

Author(s): Amin Hosseinkhani and Guido BurkardWe develop the theory of single-electron silicon spin qubit relaxation in the presence of a magnetic field gradient. Such field gradients are routinely generated by on-chip micromagnets to allow for electrically controlled quantum gates on spin qubits. We build on a valley-dependent envelope functio…[Phys....

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Significant thermal Hall effect in the $3d$ cobalt Kitaev system ${\mathrm{Na}}_{2}{\mathrm{Co}}_{2}\mathrm{Te}{\mathrm{O}}_{6}$

Author(s): Heejun Yang, Chaebin Kim, Ysun Choi, Jun Han Lee, Gaoting Lin, Jie Ma, Marie Kratochvílová, Petr Proschek, Eun-Gook Moon, Ki Hoon Lee, Yoon Seok Oh, and Je-Geun ParkKitaev physics has recently attracted attention in condensed matter for its anticipated quantum spin liquid (QSL) state. The thermal transport measurement is crucial for probing...

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Anomalous temperature dependence of phonon pumping by ferromagnetic resonance in Co/Pd multilayers with perpendicular anisotropy

Author(s): W. K. Peria, D.-L. Zhang, Y. Fan, J.-P. Wang, and P. A. CrowellWe demonstrate the pumping of phonons by ferromagnetic resonance in a series of [Co(0.8nm)/Pd(1.5nm)]n multilayers (n=6, 11, 15, and 20) with strong magnon-phonon coupling and perpendicular magnetic anisotropy. The effect is shown using broadband ferromagnetic resonance over a...

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Linear level repulsions near exceptional points of non-Hermitian systems

Author(s): C. Wang and X. R. WangThe nearest-neighbor level-spacing distributions are a fundamental quantity of disordered systems and are classified into different universality classes. They are the Wigner-Dyson and the Poisson functions for extended and localized states in Hermitian systems, respectively. The distributions follow…[Phys. Rev. B 106,...

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Photoinduced Drude weights critically enhanced by charge fluctuations in a one-dimensional Mott insulator

Author(s): T. Yamaguchi, K. Iwano, and H. OkamotoThis Letter theoretically validated that the ω=0 component of a photoexcited Drude peak in one-dimensional Mott insulators is nonzero only when a finite amount of charge fluctuations is included. Here, we define charge fluctuations as annihilations and creations of photoexcited elementary particles,…[Phys....

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Changes in polarization dictate necessary approximations for modeling electronic deexcitation intensity: Application to x-ray emission

Author(s): Subhayan Roychoudhury, Leonardo A. Cunha, Martin Head-Gordon, and David PrendergastAccurate simulation of electronic excitations and deexcitations are critical for complementing complex spectroscopic experiments and can provide validation to theoretical approaches. Using a generalized framework, we contrast the accuracy and validity of orbital-constrained...

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