Tootfinder

Most migrants likely wouldn’t say they’re fleeing climate change.
They’re escaping war, economic uncertainty, social instability and the like.
But climate change multiplies those threats.
It’s not a coincidence that 95% of conflict refugees in 2020 came from global-warming hot spots.
A 2021 study by researchers at the National Autonomous University of Mexico found the movement of low-income farmers from Mexico to the U.S. not only tripled during times of drought but …

It’s far cheaper to help migrants before they leave home
As global temperatures rise, so will the frequency of heat waves, droughts, floods, pandemics, natural disasters, food and water shortages and conflicts over resources.

Most migrants likely wouldn’t say they’re fleeing climate change.
They’re escaping war, economic uncertainty, social instability and the like.
But climate change multiplies those threats.
It’s not a coincidence that 95% of conflict refugees in 2020 came from global-warming hot spots.
A 2021 study by researchers at the National Autonomous University of Mexico found the movement of low-income farmers from Mexico to the U.S. not only tripled during times of drought but …

It’s far cheaper to help migrants before they leave home
As global temperatures rise, so will the frequency of heat waves, droughts, floods, pandemics, natural disasters, food and water shortages and conflicts over resources.

The California Labor Commissioner's Office fines Amazon $5.9M for violating a 2022 state law by failing to properly inform workers of quotas at two warehouses (Caroline O'Donovan/Washington Post)
https://www.washingtonpost.com/technology/

Amazon fined $5.9 million for breaking labor law in California
The company is among the first to run afoul of a union-backed law aimed at protecting warehouse workers from aggressive productivity quotas.

Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
Yong-Yue Zong, Zhao-Long Gu, Jian-Xin Li
https://arxiv.org/abs/2406.11374 https://arxiv.org/pdf/2406.11374
arXiv:2406.11374v1 Announce Type: new
Abstract: Twisted transition metal dichalcogenides are a new platform for realizing strongly correlated physics with high tunability. Recent transport experiments have reported the realization of a Mott insulator, its bandwidth-driven evolution to a metal, and the strange metal behavior in proximity to the transition via the tuning of a displacement field in twisted $\mathrm{WSe_2}$($\mathrm{tWSe_2}$) fixed at half filling. However, the nature of the correlated states and the related Mott physics involved in the whole process remain to be determined. Here, we unveil theoretically the evolution of the ground state of the half-filled $\boldsymbol{\mathrm{moir\acute{e}}}$ Hubbard model as applied to $\mathrm{tWSe_2}$, transiting from a pseudogap state with Fermi arcs to a 120$^\circ$ Ne$\boldsymbol{\acute{\mathrm{e}}}$l ordered Mott insulator, then to another pseudogap state with Fermi pockets, and eventually to a Fermi liquid via a Lifshitz transition. The pseudogap phases are definitively identified by the vanishing of quasiparticle weights over an extended region of the free Fermi surface, with the remaining parts forming disconnected Fermi arcs or pockets that contain well-defined quasiparticles. The loss of quasiparticle weights in the pseudogap phases indicates the breakdown of Landau's Fermi liquid theory. We demonstrate that the emergence of the Fermi arcs/pockets results from the electronic structure reconstruction driven by strong electron correlations, marked by the existence of Luttinger surface enclosed by the zeros of single-particle Green's function. This work reveals the fundamental aspects of the Mottness in $\boldsymbol{\mathrm{moir\acute{e}}}$ systems and will stimulate the advance of the direct probes of the Fermi surface and quasiparticles beyond transports, such as angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling microscopy (STM) experiments.

This https://arxiv.org/abs/2406.05380 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of floating surface state in obstructed atomic insulator candidate NiP$_2$
Obstructed atomic insulator is recently proposed as an unconventional material, in which electric charge centers localized at sites away from the atoms. A half-filling surface state would emerge at specific interfaces cutting through these charge centers and avoid intersecting any atoms. In this article, we utilized angle-resolved photoemission spectroscopy and density functional theory calculations to study one of the obstructed atomic insulator candidates, NiP$_2$. A floating surface state wi…

Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
Yong-Yue Zong, Zhao-Long Gu, Jian-Xin Li
https://arxiv.org/abs/2406.11374 https://arxiv.org/pdf/2406.11374
arXiv:2406.11374v1 Announce Type: new
Abstract: Twisted transition metal dichalcogenides are a new platform for realizing strongly correlated physics with high tunability. Recent transport experiments have reported the realization of a Mott insulator, its bandwidth-driven evolution to a metal, and the strange metal behavior in proximity to the transition via the tuning of a displacement field in twisted $\mathrm{WSe_2}$($\mathrm{tWSe_2}$) fixed at half filling. However, the nature of the correlated states and the related Mott physics involved in the whole process remain to be determined. Here, we unveil theoretically the evolution of the ground state of the half-filled $\boldsymbol{\mathrm{moir\acute{e}}}$ Hubbard model as applied to $\mathrm{tWSe_2}$, transiting from a pseudogap state with Fermi arcs to a 120$^\circ$ Ne$\boldsymbol{\acute{\mathrm{e}}}$l ordered Mott insulator, then to another pseudogap state with Fermi pockets, and eventually to a Fermi liquid via a Lifshitz transition. The pseudogap phases are definitively identified by the vanishing of quasiparticle weights over an extended region of the free Fermi surface, with the remaining parts forming disconnected Fermi arcs or pockets that contain well-defined quasiparticles. The loss of quasiparticle weights in the pseudogap phases indicates the breakdown of Landau's Fermi liquid theory. We demonstrate that the emergence of the Fermi arcs/pockets results from the electronic structure reconstruction driven by strong electron correlations, marked by the existence of Luttinger surface enclosed by the zeros of single-particle Green's function. This work reveals the fundamental aspects of the Mottness in $\boldsymbol{\mathrm{moir\acute{e}}}$ systems and will stimulate the advance of the direct probes of the Fermi surface and quasiparticles beyond transports, such as angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling microscopy (STM) experiments.

Partial stochastic resetting with refractory periods
Kristian St{\o}levik Olsen, Hartmut L\"owen
https://arxiv.org/abs/2406.10039 https://

Partial stochastic resetting with refractory periods
The effect of refractory periods in partial resetting processes is studied. Under Poissonian partial resets, a state variable jumps to a value closer to the origin by a fixed fraction at constant rate, $x\to a x$. Following each reset, a stationary refractory period of arbitrary duration takes place. We derive an exact closed-form expression for the propagator in Fourier-Laplace space, which shows rich dynamical features such as connections not only to other resetting schemes but also to interm…

This https://arxiv.org/abs/2208.12818 has been replaced.
link: https://scholar.google.com/scholar?q=a

Searching for light neutralinos with a displaced vertex at the LHC
We study a bino-like light neutralino ($\tilde χ_1^0$) produced at the LHC from the decay of a scalar lepton ($\tilde e_L$) through the process $pp\to \tilde e_{L} \to e\tilde χ_1^0$ in the context of R-parity-violating (RPV) supersymmetry where $\tilde χ_1^0$ is the lightest supersymmetric particle. For small masses and RPV couplings, the neutralino is naturally long-lived and its decay products can be identified as displaced tracks. Following existing searches, we propose a displaced-verte…

This https://arxiv.org/abs/2406.05380 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of floating surface state in obstructed atomic insulator candidate NiP$_2$
Obstructed atomic insulator is recently proposed as an unconventional material, in which electric charge centers localized at sites away from the atoms. A half-filling surface state would emerge at specific interfaces cutting through these charge centers and avoid intersecting any atoms. In this article, we utilized angle-resolved photoemission spectroscopy and density functional theory calculations to study one of the obstructed atomic insulator candidates, NiP$_2$. A floating surface state wi…

Synergetic effect of edge states and point defects to tune ferromagnetism in CVD-grown vertical nanostructured MoS2: A correlation between electronic structure and theoretical study
Sharmistha Dey, Pankaj Srivastava, Ankita Phutela, Saswata Bhattacharya, Fouran Singh, Santanu Ghosh
https://arxiv.org/abs/2406.09721

Synergetic effect of edge states and point defects to tune ferromagnetism in CVD-grown vertical nanostructured MoS2: A correlation between electronic structure and theoretical study
Room-temperature ferromagnetism (RTFM) exhibited by nanostructured two-dimensional semiconductors for spintronics applications is a fascinating area of research. The present work reports on the correlation between the electronic structure and magnetic properties of defect-engineered nano-structured MoS2 thin films. Low-energy light and heavy-mass ion irradiation have been performed to create defects and tune magnetic properties. Vertical nanosheets with edge state termination in the pristine sa…