Results 71 to 80 of about 15,915 (158)

Alleviating trade‐off between responsivity and response speed of Ga2O3 solar‐blind photodetector via modulation of carrier redistribution and extraction accessibility

InfoMat, Volume 7, Issue 9, September 2025.
Ga2O3 photodetectors, particularly those dominated by the photoconductive effect, inevitably face a trade‐off between photoresponsivity and response speed. In this work, bilayer‐structure Ga2O3 films are adopted for solar‐blind photodetectors to alleviate the trade‐off between photoresponsivity and response speed.
Xiaolan Ma, Ying Zhang, Pengju Tan, Xiao Feng, Yiran Hao, Guangwei Xu, Xiaolong Zhao, Nan Gao, Xiaohu Hou, Qin Hu, Shibing Long   +10 more
wiley   +1 more source

Dark Dimension With (Little) Strings Attached

Fortschritte der Physik, Volume 73, Issue 4, April 2025.
Abstract A relation between dark energy and the scale of new physics in weakly coupled string theory is motivated. This mixing between infrared and ultraviolet physics leads to a unique corner for real‐world phenomenology: barring fine‐tunings, the authors are naturally led to the “dark dimension” scenario, a single mesoscopic extra dimension of micron
Ivano Basile, Dieter Lüst
wiley   +1 more source

Band Tailoring Enabled Perovskite Devices for X‐Ray to Near‐Infrared Photodetection

Advanced Science, Volume 12, Issue 9, March 6, 2025.
Perovskite‐based photodetectors are improved for wide‐spectrum detection X‐rays to near‐infrared using a type‐II heterojunction with tellurium. This design reduces dark current noise and enhances sensitivity, with a scalable sensor array showing promise for imaging applications.
Yi‐Chu He, Guan‐Hua Dun, Jun Deng, Jia‐Li Peng, Ken Qin, Jia‐He Zhang, Xiang‐Shun Geng, Min‐Shu Zhang, Ze‐Shu Wang, Yan Xie, Zhao‐Qiang Bai, Dan Xie, He Tian, Yi Yang, Tian‐Ling Ren   +14 more
wiley   +1 more source

Notes on Characterizations of 2d Rational SCFTs: Algebraicity, Mirror Symmetry, and Complex Multiplication

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract S. Gukov and C. Vafa proposed a characterization of rational N=(1,1)$N=(1,1)$ superconformal field theories (SCFTs) in 1+1$1+1$ dimensions with Ricci‐flat Kähler target spaces in terms of the Hodge structure of the target space, extending an earlier observation by G. Moore.
Abhiram Kidambi, Masaki Okada, Taizan Watari   +2 more
wiley   +1 more source

Flux vacua of the mirror octic

Journal of High Energy Physics
We determine all flux vacua with flux numbers N flux ≤ 10 for a type IIB orientifold-compactification on the mirror-octic three-fold. To achieve this, we develop and apply techniques for performing a complete scan of flux vacua for the whole moduli space
Erik Plauschinn, Lorenz Schlechter
doaj   +1 more source

On (scalar QED) gravitational positivity bounds

Journal of High Energy Physics, 2023
We study positivity bounds in the presence of gravity. We first review the gravitational positivity bound at the tree-level, where it is known that a certain amount of negativity is allowed for the coefficients of higher-derivative operators. The size of
Yuta Hamada, Rinto Kuramochi, Gregory J. Loges, Sota Nakajima   +3 more
doaj   +1 more source

T‐Symmetry in String Geometry Theory

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
String geometry theory is one of the candidates of nonperturbative formulation of string theory. In this paper, we have shown that dimensionally reduced string geometry theories have what we call T‐symmetry. In the case of the dimensional reduction in space‐like directions, the T‐symmetry transformation gives the T‐dual transformation between the Type ...
Matsuo Sato, Taiki Tohshima, Michele Arzano   +2 more
wiley   +1 more source

Flux vacua in type IIB compactifications on orbifolds: their finiteness and minimal string coupling

Journal of High Energy Physics
We perform a detailed study of (supersymmetric) moduli stabilisation in type IIB toroidal orientifolds with fluxes. We provide strong evidence towards exhaustion of the finite number of inequivalent vacua for a given total 3-form flux charge N flux.
Ignatios Antoniadis, Anthony Guillen, Osmin Lacombe   +2 more
doaj   +1 more source

Inflation with a graceful exit in a random landscape

Journal of High Energy Physics, 2017
We develop a stochastic description of small-field inflationary histories with a graceful exit in a random potential whose Hessian is a Gaussian random matrix as a model of the unstructured part of the string landscape.
F. G. Pedro, A. Westphal
doaj   +1 more source

The Kreuzer-Skarke axiverse

Journal of High Energy Physics, 2020
We study the topological properties of Calabi-Yau threefold hypersurfaces at large h 1,1. We obtain two million threefolds X by triangulating polytopes from the Kreuzer-Skarke list, including all polytopes with 240 ≤ h 1,1 ≤ 491.
Mehmet Demirtas, Cody Long, Liam McAllister, Mike Stillman   +3 more
doaj   +1 more source