Author(s): Ziyan Zhu, Stephen Carr, Qiong Ma, and Efthimios Kaxiras
The recently observed unconventional ferroelectricity in AB bilayer graphene sandwiched by hexagonal boron nitride (hBN) presents a new platform to manipulate correlated phases in multilayered van der Waals heterostructures [Zheng et al., Nature 588, 71 (2020).]. We present a low-energy continuum m…
[Phys. Rev. B 106, 205134] Published Mon Nov 21, 2022
Author(s): Somnath Biswas, Ioannis Petrides, Robert J. Kirby, Catrina Oberg, Sebastian Klemenz, Caroline Weinberg, Austin Ferrenti, Prineha Narang, Leslie M. Schoop, and Gregory D. Scholes
Out-of-equilibrium effects provide an elegant pathway for probing and understanding the underlying physics of topological materials. In particular, controlling electronic band structure properties using ultrafast optical pulses has shown promise for creating exotic states of matter. Of recent intere…
[Phys. Rev. B 106, 134303] Published Tue Oct 11, 2022
Author(s): Yu Liu (刘育), Xiao Tong (佟晓), V. N. Ivanovski, Zhixiang Hu (胡之翔), Denis Leshchev, Xiangde Zhu (朱相德), Hechang Lei (雷和畅), Eli Stavitski, Klaus Attenkofer, V. Koteski, and C. Petrovic
Charge density waves (CDWs) with superconductivity, competing Fermi surface instabilities, and collective orders have captured much interest in two-dimensional van der Waals (vdW) materials. Understanding the CDW suppression mechanism, its connection to the emerging superconducting state, and electr…
[Phys. Rev. B 106, 165113] Published Thu Oct 13, 2022
Author(s): Seungjun Lee, D. J. P. de Sousa, Young-Kyun Kwon, Fernando de Juan, Zhendong Chi, Fèlix Casanova, and Tony Low
We investigate the twist-angle dependence of spin-orbit coupling proximity effects and charge-to-spin conversion (CSC) in graphene/WSe2 heterostructures from first principles. The CSC is shown to strongly depend on the twist angle, with standard Rashba-Edelstein and disorder-free spin Hall efficienc…
[Phys. Rev. B 106, 165420] Published Thu Oct 20, 2022
Author(s): D. A. Estyunin, T. P. Makarova, K. A. Kokh, O. E. Tereshchenko, A. M. Shikin, and I. I. Klimovskikh
Intrinsic magnetic topological insulators (MTIs), such as an MnBi2Te4 family, have proved to be an essential platform for the study of various quantum effects and can be used for a range of applications from information storage and dissipationless spin and charge transfer to quantum computers. The l…
[Phys. Rev. B 106, 155305] Published Fri Oct 21, 2022
Author(s): Jose H. Garcia, Jinxuan You, Mónica García-Mota, Peter Koval, Pablo Ordejón, Ramón Cuadrado, Matthieu J. Verstraete, Zeila Zanolli, and Stephan Roche
We evidence the possibility for coherent electrical manipulation of the spin orientation of topologically protected edge states in a low-symmetry quantum spin Hall insulator. By using a combination of ab initio simulations, symmetry-based modeling, and large-scale calculations of the spin Hall condu…
[Phys. Rev. B 106, L161410] Published Fri Oct 21, 2022
Author(s): C. Patra, T. Agarwal, Rajeshwari R. Chaudhari, and R. P. Singh
Superconducting transition metal dichalcogenides have emerged as a platform for hosting novel and nontrivial physical phenomena. We report a detailed investigation of superconducting and transport properties on 2H−TaSeS single crystals. It suggests that TaSeS is a multigap anisotropic superconductor…
[Phys. Rev. B 106, 134515] Published Fri Oct 28, 2022
Author(s): Alexandre Artaud, Nicolas Rougemaille, Sergio Vlaic, Vincent T. Renard, Nicolae Atodiresei, and Johann Coraux
Two-dimensional (2D) superlattices in conventional semiconductors are rigid. In 2D materials, where they are called moiré patterns, they are flexible so the physical properties depend not only on the super-periodicity but also on the 2D membrane’s topography. A mixed continuous+atomistic theory, treating 2D materials as crystalline elastic membranes, reveals the role of out-of-plane deformations on the ground-state topography. The model’s predictions agree with experimental structural characterizations on model systems (epitaxial graphene and MoS2 on metals) and explain moiré wavelength selection and wrinkling phenomena.
[Phys. Rev. B 106, L201402] Published Fri Nov 04, 2022
Author(s): Chenyi Gu, Xiaowei Liu, Cheng Chen, Aiji Liang, Wei Guo, Xinrui Yang, Jian Zhou, Chris Jozwiak, Aaron Bostwick, Zhongkai Liu, Shi-Jun Liang, Yulin Chen, Feng Miao, Eli Rotenberg, and Yuefeng Nie
Palladium diselenide (PdSe2), a recently exploited transition metal dichalcogenide material with a thickness-dependent band gap, anisotropic optical response, and high air stability, has shown excellent performance in electronics and polarization photodetection. However, the origin of the intriguing…
[Phys. Rev. B 106, L121110] Published Tue Sep 20, 2022
Author(s): M. Zapf, M. Schmitt, J. Gabel, P. Scheiderer, M. Stübinger, B. Leikert, G. Sangiovanni, L. Dudy, S. Chernov, S. Babenkov, D. Vasilyev, O. Fedchenko, K. Medjanik, Yu. Matveyev, A. Gloskowski, C. Schlueter, T.-L. Lee, H.-J. Elmers, G. Schönhense, M. Sing, and R. Claessen
Novel two-dimensional electron systems at the interfaces and surfaces of transition-metal oxides recently have attracted much attention as they display tunable, intriguing properties that can be exploited in future electronic devices. Here we show that a high-mobility quasi-two-dimensional electron …
[Phys. Rev. B 106, 125137] Published Wed Sep 21, 2022
Author(s): Yevhen Kushnirenko, Benjamin Schrunk, Brinda Kuthanazhi, Lin-Lin Wang, Junyeong Ahn, Evan O'Leary, Andrew Eaton, S. L. Bud'ko, Robert-Jan Slager, P. C. Canfield, and Adam Kaminski
The recent discovery of Fermi arcs and new magnetic bands splitting in antiferromagnet NdBi has opened up new avenues for exploration. This study shows that these uncharted effects are not restricted to NdBi, but also emerge in other rare-earth monopnictides. Also, it shows that the relative intensity of the new bands and splitting of these bands scale with the magnetic moments of the rare-earth elements.
[Phys. Rev. B 106, 115112] Published Thu Sep 08, 2022
Author(s): Rahul Debnath, Shaili Sett, Sudipta Kundu, Rabindra Biswas, Varun Raghunathan, Manish Jain, Arindam Ghosh, and Akshay Singh
Twist angle modifies the band alignment, screening, and interlayer (IL) coupling in twisted bilayers (tBLs) of transition metal dichalcogenides. Intermediate misorientation (twist angles > 15∘) bilayers (BLs) offer a unique opportunity to tune excitonic behavior within these concurrent physical m…
[Phys. Rev. B 106, 125409] Published Fri Sep 09, 2022
Author(s): Amit Kumar, Shiv Kumar, Yudai Miyai, and Kenya Shimada
We report the temperature-dependent band structure and energy dependence of the electron-phonon interaction of the topological surface state (TSS) on the three-dimensional topological insulator Bi2Te3 using angle-resolved photoemission spectroscopy. Despite the nonrigid-band-like band modification a…
[Phys. Rev. B 106, L121104] Published Mon Sep 12, 2022
Author(s): E. Vélez-Fort, P. Mallet, H. Boukari, A. Marty, C. Vergnaud, F. Bonell, M. Jamet, and J-Y. Veuillen
We have analyzed by means of scanning tunneling microscopy and spectroscopy the atomic and electronic structure of monolayers (1L) of 1T−VxPt1−xSe2 alloys grown by molecular beam epitaxy on epitaxial graphene substrates. We have focused on the composition range (0.1≤x≤0.35) where ferromagnetic behav…
[Phys. Rev. B 106, 075432] Published Tue Aug 30, 2022
Author(s): Yi Chen, Wei Ruan, Jeffrey D. Cain, Ryan L. Lee, Salman Kahn, Caihong Jia, Alex Zettl, and Michael F. Crommie
Is it possible to have a single crystal that hosts a variety of correlated surface states? Layered transition metal dichalcogenides such as bulk 1T-TaSe2 offer a unique platform for accomplishing this since the electrons in each charge density wave (CDW) unit cell are susceptible to both Coulomb repulsion and interlayer coupling. By using scanning tunneling microscopy and spectroscopy, the authors identify here a multitude of correlated surface states that exist on bulk 1T-TaSe2 with properties ranging all the way from Mott insulating to strongly metallic Kondo behavior. 1T-TaSe2 thus simulates the full range of the periodic Anderson model within a single crystal by combining electron correlations with variable interlayer coupling.
[Phys. Rev. B 106, 075153] Published Tue Aug 30, 2022
Author(s): Li Yin, Tom Berlijn, Rinkle Juneja, Lucas Lindsay, and David S. Parker
The field of two-dimensional ferromagnets has been reinvigorated by the discovery of VSe2 monolayer grown on van der Waals substrates, which is reported to be ferromagnetic with a Curie point higher than 330 K. However, the ferromagnetic and nonmagnetic states of pristine monolayer VSe2 are highly d…
[Phys. Rev. B 106, 085117] Published Thu Aug 11, 2022
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 Lanzara
Optical 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, or via light-driven coherence, such as optical Stark and Bloch-Siegert effects. Although theoretical work ha…
[Phys. Rev. B 106, L081117] Published Thu Aug 18, 2022
Author(s): Manoj Singh, Boning Yu, James Huber, Bishnu Sharma, Ghilles Ainouche, Ling Fu, Jasper van Wezel, and Michael C. Boyer
We use scanning tunneling microscopy to study the domain structure of the nearly commensurate charge density wave (NC-CDW) state of 1T−TaS2. In our subangstrom characterization of the state, we find a continual evolution of the CDW lattice from domain wall to domain center, instead of a fixed CDW ar…
[Phys. Rev. B 106, L081407] Published Fri Aug 19, 2022
Author(s): Pengke Li (李鹏科), Cedric Robert, Dinh Van Tuan, Lei Ren, Min Yang, Xavier Marie, and Hanan Dery
The variety of excitonic states in tungsten-based dichalcogenide monolayers stems from unique interplay between the spin and valley degrees of freedom. One of the exciton species is the indirect exciton (momentum or valley dark), which is responsible for a series of resonances when the monolayer is …
[Phys. Rev. B 106, 085414] Published Mon Aug 22, 2022
Author(s): Li Yin, Tom Berlijn, Rinkle Juneja, Lucas Lindsay, and David S. Parker
The field of two-dimensional ferromagnets has been reinvigorated by the discovery of VSe2 monolayer grown on van der Waals substrates, which is reported to be ferromagnetic with a Curie point higher than 330 K. However, the ferromagnetic and nonmagnetic states of pristine monolayer VSe2 are highly d…
[Phys. Rev. B 106, 085117] Published Thu Aug 11, 2022
Author(s): Keisuke Nakagahara and Katsunori Wakabayashi
Graphene on h-BN (G/hBN) has a long period moiré superstructure owing to the lattice mismatch between two materials. The long periodic potential caused by the moiré superstructure induces modulation of the electronic properties of the system. In this paper, we numerically calculate the optical condu…
[Phys. Rev. B 106, 075403] Published Wed Aug 03, 2022
Author(s): Zhanyang Hao, Yongqing Cai, Yixuan Liu, Yuan Wang, Xuelei Sui, Xiao-Ming Ma, Zecheng Shen, Zhicheng Jiang, Yichen Yang, Wanling Liu, Qi Jiang, Zhengtai Liu, Mao Ye, Dawei Shen, Yi Liu, Shengtao Cui, Jiabin Chen, Le Wang, Cai Liu, Junhao Lin, Jianfeng Wang, Bing Huang, Jia-Wei Mei, and Chaoyu Chen
Recently, V-based kagome superconductors have emerged as a new research topic in condensed matter physics by intertwining superconductivity, charge density wave, and strong correlation. Here, the authors identify CsV3Sb5 as a Dirac nodal-line semimetal by determining multiple Dirac nodal lines and loops close to the Fermi level with the help of ARPES and first-principles calculations. These nodal lines and loops could provide yet another source for obtaining larger Berry curvature and, hence, larger anomalous Hall conductivity, thus offering essential insight into the exotic transport behavior observed.
[Phys. Rev. B 106, L081101] Published Tue Aug 02, 2022
Author(s): Yadong Jiang, Zhaochen Liu, and Jing Wang
The unoccupied part of the band structure in the magnetic topological insulator MnBi2Te4 is studied by first-principles calculations. We propose a possible second, unoccupied topological surface state with a similar electronic structure to the celebrated occupied topological surface state. The conve…
[Phys. Rev. B 106, 045148] Published Fri Jul 29, 2022
Author(s): Yi-Hsuan Liu, Sheng Zhang, Puhan Zhang, Ting-Kuo Lee, and Gia-Wei Chern
We present a scalable machine learning (ML) model to predict local electronic properties such as on-site electron number and double occupation for disordered correlated electron systems. Our approach is based on the locality principle, or the nearsightedness nature, of many-electron systems, which m…
[Phys. Rev. B 106, 035131] Published Tue Jul 19, 2022
Author(s): Xing-Guo Ye, Peng-Fei Zhu, Wen-Zheng Xu, Zhihao Zang, Yu Ye, and Zhi-Min Liao
The anomalous Hall effect (AHE) has been extended into the nonlinear regime, where the Hall voltage shows higher-order response to the applied current. Nevertheless, the microscopic mechanism of the nonlinear AHE remains unclear. Here we report the orbital polarization and its induced third-order AH…
[Phys. Rev. B 106, 045414] Published Fri Jul 15, 2022
Author(s): D. Erben, A. Steinhoff, M. Lorke, and F. Jahnke
In atomically thin semiconductors based on transition metal dichalcogenides, photoexcitation can be used to generate high densities of electron-hole pairs. Due to optical nonlinearities, which originate from Pauli blocking and many-body effects of the excited carriers, the generated carrier density …
[Phys. Rev. B 106, 045409] Published Fri Jul 08, 2022
Author(s): Zhijie Li, Jonathan Förste, Kenji Watanabe, Takashi Taniguchi, Bernhard Urbaszek, Anvar S. Baimuratov, Iann C. Gerber, Alexander Högele, and Ismail Bilgin
Twisted layers of atomically thin two-dimensional materials realize a broad range of quantum materials with engineered optical and transport phenomena arising from spin and valley degrees of freedom and strong electron correlations in hybridized interlayer bands. Here, we report on experimental and …
[Phys. Rev. B 106, 045411] Published Mon Jul 11, 2022