2021 – Page 105 – Kavli Institute Pre-Print Publications

Four-Spin Terms and the Origin of the Chiral Spin Liquid in Mott Insulators on the Triangular Lattice

Posted by March 12, 2021Berkeley

Kavli Affiliate: Joel E. Moore | First 5 Authors: Tessa Cookmeyer, Johannes Motruk, Joel E. Moore, , | Summary: At strong repulsion, the triangular-lattice Hubbard model is described by $s=1/2$ spins with nearest-neighbor antiferromagnetic Heisenberg interactions and exhibits conventional 120$^circ$ order. Using the infinite density matrix renormalization group and exact diagonalization, we study the effect […]

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Revealing the Brønsted-Evans-Polanyi Relation in Halide-Activated Fast MoS2 Growth Towards Millimeter-Sized 2D Crystals

Posted by klaurent March 12, 2021Berkeley

Kavli Affiliate: Alex Zettl | First 5 Authors: Qingqing Ji, Cong Su, Nannan Mao, Xuezeng Tian, Juan-Carlos Idrobo | Summary: Achieving large-size two-dimensional (2D) crystals is key to fully exploiting their remarkable functionalities and application potentials. Chemical vapor deposition (CVD) growth of 2D semiconductors such as monolayer MoS2 has been reported to be activated by […]

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Momentum-resolved electronic band structure and offsets in an epitaxial NbN/GaN superconductor/semiconductor heterojunction

Posted by klaurent March 12, 2021Cornell

Kavli Affiliate: David Muller | First 5 Authors: Tianlun Yu, John Wright, Guru Khalsa, Betül Pamuk, Celesta S. Chang | Summary: The electronic structure of heterointerfaces play a pivotal role in their device functionality. Recently, highly crystalline ultrathin films of superconducting NbN have been integrated by molecular beam epitaxy with the semiconducting GaN. We use […]

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Picosecond Laser Ablation of Millimeter-Wave Subwavelength Structures on Alumina and Sapphire

Posted by klaurent March 11, 2021Tokyo

Kavli Affiliate: Tomotake Matsumura | First 5 Authors: Qi Wen, Elena Fadeeva, Shaul Hanany, Jürgen Koch, Tomotake Matsumura | Summary: We use a 1030 nm laser with 7 ps pulse duration and average power up to 100 W to ablate pyramid-shape subwavelength structures (SWS) on alumina and sapphire. The SWS give an effective and cryogenically […]

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Modelling the Multiwavelength Variability of Mrk 335 using Gaussian Processes

Posted by klaurent March 11, 2021MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Ryan-Rhys Griffiths, Jiachen Jiang, Douglas J. K. Buisson, Dan R. Wilkins, Luigi C. Gallo | Summary: The optical and UV variability of the majority of AGN may be related to the reprocessing of rapidly-changing X-ray emission from a more compact region near the central black hole. Such […]

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Mechanisms of Andreev reflection in quantum Hall graphene

Posted by klaurent March 11, 2021Delft

Kavli Affiliate: Anton R. Akhmerov | First 5 Authors: Antonio L. R. Manesco, Ian Matthias Flór, Chun-Xiao Liu, Anton R. Akhmerov, | Summary: We simulate a hybrid superconductor-graphene device in the quantum Hall regime to identify the origin of downstream resistance oscillations in a recent experiment [Zhao et. al. Nature Physics 16, (2020)]. In addition […]

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On the Mass Loading of AGN-Driven Outflows in Elliptical Galaxies and Clusters

Posted by klaurent March 11, 2021Peking

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Yu Qiu, Brian R. McNamara, Tamara Bogdanovic, Kohei Inayoshi, Luis C. Ho | Summary: Outflows driven by active galactic nuclei (AGN) are an important channel for accreting supermassive black holes (SMBHs) to interact with their host galaxies and clusters. Properties of the outflows are however poorly constrained […]

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Covariant phase space for gravity with boundaries: metric vs tetrad formulations

Posted by klaurent March 10, 2021MIT

Kavli Affiliate: J. S. Villasenor | First 5 Authors: J. Fernando Barbero G., Juan Margalef-Bentabol, Valle Varo, Eduardo J. S. Villaseñor, | Summary: We use covariant phase space methods to study the metric and tetrad formulations of General Relativity in a manifold with boundary and compare the results obtained in both approaches. Proving their equivalence […]

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Anisotropic superconducting spin transport at magnetic interfaces

Posted by klaurent March 10, 2021UCAS

Kavli Affiliate: Mamoru Matsuo | First 5 Authors: Yuya Ominato, Ai Yamakage, Mamoru Matsuo, , | Summary: We present a theoretical investigation of anisotropic superconducting spin transport at a magnetic interface between a p-wave superconductor and a ferromagnetic insulator. Our formulation describes the ferromagnetic resonance modulations due to spin current generation depending on spin-triplet Cooper […]

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Large R-charge EFT correlators in N=2 SQCD

Posted by klaurent March 9, 2021Tokyo

Kavli Affiliate: Simeon Hellerman | First 5 Authors: Simeon Hellerman, Domenico Orlando, , , | Summary: We consider large-R-charge Coulomb branch correlation functions in $mathcal{N} = 2$ superconformal QCD in D=4 dimensions, with gauge group $SU(2)$ and $N_f = 4$ hypermultiplets in the fundamental representation. Using information from supersymmetric recursion relations, S-duality, and matching of […]

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