arXiv - PHYS - Other Condensed Matter最新文献_第8页

Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$ 铁电体 BaTi$_{0.8}$Zr$_{0.2}$O$_3$ 中居里温度以上的相变和极簇行为

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-30 DOI: arxiv-2404.19558

Oktay Aktas, Francisco Javier Romero, Zhengwang He, Gan Linyu, Xiangdong Ding, José-María Martín-Olalla, Maria-Carmen Gallardo, Turab Lookman

引用次数: 0

Anomalous Spin and Orbital Hall Phenomena in Antiferromagnetic Systems 反铁磁系统中的反常自旋和轨道霍尔现象

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-29 DOI: arxiv-2404.18712

J. E. Abrão, E. Santos, J. L. Costa, J. G. S. Santos, J. B. S. Mendes, A. Azevedo

引用次数: 0

Spin-dependent $π$$π^{ast}$ gap in graphene on a magnetic substrate 磁性衬底上石墨烯中的自旋依赖性 $π$$π^{ast}$ 间隙

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-27 DOI: arxiv-2404.17887

P. M. Sheverdyaeva, G. Bihlmayer, E. Cappelluti, D. Pacilé, F. Mazzola, N. Atodiresei, M. Jugovac, I. Grimaldi, G. Contini, A. K. Kundu, I. Vobornik, J. Fujii, P. Moras, C. Carbone, L. Ferrari

引用次数: 0

Neural network-based recognition of multiple nanobubbles in graphene 基于神经网络识别石墨烯中的多个纳米气泡

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-24 DOI: arxiv-2404.15658

Subin Kim, Nojoon Myoung, Seunghyun Jun, Ara Go

引用次数: 0

Structural investigation of the quasi-one-dimensional topological insulator Bi$_4$I$_4$ 准一维拓扑绝缘体 Bi$_4$I$_4$ 的结构研究

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-24 DOI: arxiv-2404.16194

C. David Hinostroza, Leandro Rodrigues de Faria, Gustavo H. Cassemiro, J. Larrea Jiménez, Antonio Jefferson da Silva Machado, Walber H. Brito, Valentina Martelli

{"title":"Structural investigation of the quasi-one-dimensional topological insulator Bi$_4$I$_4$","authors":"C. David Hinostroza, Leandro Rodrigues de Faria, Gustavo H. Cassemiro, J. Larrea Jiménez, Antonio Jefferson da Silva Machado, Walber H. Brito, Valentina Martelli","doi":"arxiv-2404.16194","DOIUrl":"https://doi.org/arxiv-2404.16194","url":null,"abstract":"The bismuth-halide Bi$_4$I$_4$ undergoes a structural transition around\u0000$T_Psim 300$K, which separates a high-temperature $beta$ phase ($T>T_P$) from\u0000a low-temperature $alpha$ phase ($T<T_P$). $alpha$ and $beta$ phases are\u0000suggested to host electronic band structures with distinct topological\u0000classifications. Rapid quenching was reported to stabilize a metastable\u0000$beta$-Bi$_4$I$_4$ at $T<T_P$, making possible a comparative study of the\u0000physical properties of the two phases in the same low-temperature range. In\u0000this work, we present a structural investigation of the Bi$_4$I$_4$ before and\u0000after quenching together with electrical resistivity measurements. We found\u0000that rapid cooling does not consistently lead to a metastable\u0000$beta$-Bi$_4$I$_4$, and a quick transition to $alpha$-Bi$_4$I$_4$ is\u0000observed. As a result, the comparison of putative signatures of different\u0000topologies attributed to a specific structural phase should be carefully\u0000considered. The observed phase instability is accompanied by an increase in\u0000iodine vacancies and by a change in the temperature dependence of electrical\u0000resistivity, pointing to native defects as a possible origin of our finding.\u0000Density functional theory (DFT) calculations support the scenario that iodine\u0000vacancies, together with bismuth antisites and interstitials, are among the\u0000defects that are more likely to occur in Bi$_4$I$_4$ during the growth.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"31 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct observation of Floquet-Bloch states in monolayer graphene 直接观测单层石墨烯中的 Floquet-Bloch 态

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-22 DOI: arxiv-2404.14392

Dongsung Choi, Masataka Mogi, Umberto De Giovannini, Doron Azoury, Baiqing Lv, Yifan Su, Hannes Hübener, Angel Rubio, Nuh Gedik

{"title":"Direct observation of Floquet-Bloch states in monolayer graphene","authors":"Dongsung Choi, Masataka Mogi, Umberto De Giovannini, Doron Azoury, Baiqing Lv, Yifan Su, Hannes Hübener, Angel Rubio, Nuh Gedik","doi":"arxiv-2404.14392","DOIUrl":"https://doi.org/arxiv-2404.14392","url":null,"abstract":"Floquet engineering is a novel method of manipulating quantum phases of\u0000matter via periodic driving [1, 2]. It has successfully been utilized in\u0000different platforms ranging from photonic systems [3] to optical lattice of\u0000ultracold atoms [4, 5]. In solids, light can be used as the periodic drive via\u0000coherent light-matter interaction. This leads to hybridization of Bloch\u0000electrons with photons resulting in replica bands known as Floquet-Bloch\u0000states. After the direct observation of Floquet-Bloch states in a topological\u0000insulator [6], their manifestations have been seen in a number of other\u0000experiments [7-14]. By engineering the electronic band structure using\u0000Floquet-Bloch states, various exotic phase transitions have been predicted\u0000[15-22] to occur. To realize these phases, it is necessary to better understand\u0000the nature of Floquet-Bloch states in different materials. However, direct\u0000energy and momentum resolved observation of these states is still limited to\u0000only few material systems [6, 10, 14, 23, 24]. Here, we report direct\u0000observation of Floquet-Bloch states in monolayer epitaxial graphene which was\u0000the first proposed material platform [15] for Floquet engineering. By using\u0000time- and angle-resolved photoemission spectroscopy (trARPES) with mid-infrared\u0000(mid-IR) pump excitation, we detected replicas of the Dirac cone. Pump\u0000polarization dependence of these replica bands unequivocally shows that they\u0000originate from the scattering between Floquet-Bloch states and photon-dressed\u0000free-electron-like photoemission final states, called Volkov states. Beyond\u0000graphene, our method can potentially be used to directly observe Floquet-Bloch\u0000states in other systems paving the way for Floquet engineering in a wide range\u0000of quantum materials.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fully Tunable Fano Resonances in Chiral Electronic Transport 手性电子传输中的全调谐法诺共振

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-21 DOI: arxiv-2404.13597

Ai-Ying Ye, Zhao Yang Zeng

引用次数: 0

Adiabatic Approximation and Aharonov-Casher Bands in Twisted Homobilayer TMDs 扭曲同层 TMD 中的绝热近似和阿哈诺夫-卡舍尔带

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-20 DOI: arxiv-2404.13455

Jingtian Shi, Nicolás Morales-Durán, Eslam Khalaf, Allan H. MacDonald

{"title":"Adiabatic Approximation and Aharonov-Casher Bands in Twisted Homobilayer TMDs","authors":"Jingtian Shi, Nicolás Morales-Durán, Eslam Khalaf, Allan H. MacDonald","doi":"arxiv-2404.13455","DOIUrl":"https://doi.org/arxiv-2404.13455","url":null,"abstract":"Topological flat moir'e bands with nearly ideal quantum geometry have been\u0000identified in AA homobilayer transition metal dichalcogenide moir'e\u0000superlattices, and are thought to be crucial for understanding the fractional\u0000Chern insulating states recently observed therein. Previous work proposed\u0000viewing the system using an adiabatic approximation that replaces the\u0000position-dependence of the layer spinor by a nonuniform periodic effective\u0000magnetic field. When the local zero-point kinetic energy of this magnetic field\u0000cancels identically against that of an effective Zeeman energy, a Bloch-band\u0000version of Aharonov-Casher zero-energy modes, which we refer to as\u0000Aharonov-Casher band, emerges leading to ideal quantum geometry. Here, we\u0000critically examine the validity of the adiabatic approximation and identify the\u0000parameter regimes under which Aharonov-Casher bands emerge. We show that the\u0000adiabatic approximation is accurate for a wide range of parameters including\u0000those realized in experiments. Furthermore, we show that while the cancellation\u0000leading to the emergence of Aharonov-Casher bands is generally not possible\u0000beyond the leading Fourier harmonic, the leading harmonic is the dominant term\u0000in the Fourier expansions of the zero-point kinetic energy and Zeeman energy.\u0000As a result, the leading harmonic expansion accurately captures the trend of\u0000the bandwidth and quantum geometry, though it may fail to quantitatively\u0000reproduce more detailed information about the bands such as the Berry curvature\u0000distribution.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Griffith description of fracture for non-monotonic loading with application to fatigue 非单调加载的格里菲斯断裂描述及其在疲劳中的应用

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-20 DOI: arxiv-2404.13466

Subhrangsu Saha, John E. Dolbow, Oscar Lopez-Pamies

{"title":"A Griffith description of fracture for non-monotonic loading with application to fatigue","authors":"Subhrangsu Saha, John E. Dolbow, Oscar Lopez-Pamies","doi":"arxiv-2404.13466","DOIUrl":"https://doi.org/arxiv-2404.13466","url":null,"abstract":"With the fundamental objective of establishing the universality of the\u0000Griffith energy competition to describe the growth of large cracks in solids\u0000emph{not} just under monotonic but under general loading conditions, this\u0000paper puts forth a generalization of the classical Griffith energy competition\u0000in nominally elastic brittle materials to arbitrary emph{non-monotonic}\u0000quasistatic loading conditions, which include monotonic and cyclic loadings as\u0000special cases. Centered around experimental observations, the idea consists in:\u0000$i$) viewing the critical energy release rate $mathcal{G}_c$ emph{not} as a\u0000material constant but rather as a material function of both space $textbf{X}$\u0000and time $t$, $ii$) one that decreases in value as the loading progresses, this\u0000solely within a small region $Omega_ell(t)$ around crack fronts, with the\u0000characteristic size $ell$ of such a region being material specific, and $iii$)\u0000with the decrease in value of $mathcal{G}_c$ being dependent on the history of\u0000the elastic fields in $Omega_ell(t)$. By construction, the proposed Griffith\u0000formulation is able to describe any Paris-law behavior of the growth of large\u0000cracks in nominally elastic brittle materials for the limiting case when the\u0000loading is cyclic. For the opposite limiting case when the loading is\u0000monotonic, the formulation reduces to the classical Griffith formulation.\u0000Additional properties of the proposed formulation are illustrated via a\u0000parametric analysis and direct comparisons with representative fatigue fracture\u0000experiments on a ceramic, mortar, and PMMA.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of Young's double-slit phenomenon in anti-PT-symmetric electrical circuits 观测反PT对称电路中的杨氏双缝现象

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-04-17 DOI: arxiv-2404.11084

Xiumei Wang, Keyu Pan, Xizhou Shen, Xingping Zhou

引用次数: 0