Author(s): Alexander J. Fairchild, Varghese A. Chirayath, Randall W. Gladen, Ali R. Koymen, Alex H. Weiss, and Bernardo Barbiellini
Researchers have demonstrated a way of measuring the electronic states of a material’s surface while avoiding signal contaminations from deeper layers.
[Phys. Rev. Lett. 129, 106801] Published Mon Aug 29, 2022
Author(s): Elena Blundo, Paulo E. Faria Junior, Alessandro Surrente, Giorgio Pettinari, Mikhail A. Prosnikov, Katarzyna Olkowska-Pucko, Klaus Zollner, Tomasz Woźniak, Andrey Chaves, Tomasz Kazimierczuk, Marco Felici, Adam Babiński, Maciej R. Molas, Peter C. M. Christianen, Jaroslav Fabian, and Antonio Polimeni
Mechanical deformations and ensuing strain are routinely exploited to tune the band gap energy and to enhance the functionalities of two-dimensional crystals. In this Letter, we show that strain leads also to a strong modification of the exciton magnetic moment in WS2 monolayers. Zeeman-splitting me…
[Phys. Rev. Lett. 129, 067402] Published Thu Aug 04, 2022
Author(s): Dinh Van Tuan, Su-Fei Shi, Xiaodong Xu, Scott A. Crooker, and Hanan Dery
In the archetypal monolayer semiconductor WSe2, the distinct ordering of spin-polarized valleys (low-energy pockets) in the conduction band allows for studies of not only simple neutral excitons and charged excitons (i.e., trions), but also more complex many-body states that are predicted at higher …
[Phys. Rev. Lett. 129, 076801] Published Tue Aug 09, 2022
Author(s): Yuanyuan Yang, Qisi Wang, Shaofeng Duan, Hongliang Wo, Chaozhi Huang, Shichong Wang, Lingxiao Gu, Dao Xiang, Dong Qian, Jun Zhao, and Wentao Zhang
High-resolution time- and angle-resolved photoemission measurements were made on FeSe superconductors. With ultrafast photoexcitation, two critical excitation fluences that correspond to two ultrafast electronic phase transitions were found only in the dyz-orbit-derived band near the Brillouin-zone …
[Phys. Rev. Lett. 128, 246401] Published Mon Jun 13, 2022
Author(s): Xu-Chen Yang, Hongyi Yu, and Wang Yao
Nano-optical excitation can inject exciton flow with left-right directionality controlled by circular polarization and angular directionality controlled by location of the excitation.
[Phys. Rev. Lett. 128, 217402] Published Mon May 23, 2022
Author(s): Maryam Sajedi, Maxim Krivenkov, Dmitry Marchenko, Jaime Sánchez-Barriga, Anoop K. Chandran, Andrei Varykhalov, Emile D. L. Rienks, Irene Aguilera, Stefan Blügel, and Oliver Rader
The formation of large polarons has been proposed as reason for the high defect tolerance, low mobility, low charge carrier trapping, and low nonradiative recombination rates of lead halide perovskites. Recently, direct evidence for large-polaron formation has been reported from a 50% effective mass…
[Phys. Rev. Lett. 128, 176405] Published Fri Apr 29, 2022
Author(s): Arindam Pramanik, Sangeeta Thakur, Bahadur Singh, Philip Willke, Martin Wenderoth, Hans Hofsäss, Giovanni Di Santo, Luca Petaccia, and Kalobaran Maiti
We study the properties of the Dirac states in SiC-graphene and its hole-doped compositions employing angle-resolved photoemission spectroscopy and density functional theory. The symmetry-selective measurements for the Dirac bands reveal their linearly dispersive behavior across the Dirac point whic…
[Phys. Rev. Lett. 128, 166401] Published Mon Apr 18, 2022
Author(s): K. Uchida, G. Mattoni, S. Yonezawa, F. Nakamura, Y. Maeno, and K. Tanaka
Competition and cooperation among orders is at the heart of many-body physics in strongly correlated materials and leads to their rich physical properties. It is crucial to investigate what impact many-body physics has on extreme nonlinear optical phenomena, with the possibility of controlling mater…
[Phys. Rev. Lett. 128, 127401] Published Wed Mar 23, 2022
Author(s): M. Bugnet, M. Ederer, V. K. Lazarov, L. Li, Q. M. Ramasse, S. Löffler, and D. M. Kepaptsoglou
The spatial distributions of antibonding π* and σ* states in epitaxial graphene multilayers are mapped using electron energy-loss spectroscopy in a scanning transmission electron microscope. Inelastic channeling simulations validate the interpretation of the spatially resolved signals in terms of el…
[Phys. Rev. Lett. 128, 116401] Published Mon Mar 14, 2022
Author(s): Hao Huang, Lixuan Zheng, Zhiyong Lin, Xu Guo, Sheng Wang, Shuai Zhang, Chi Zhang, Zhe Sun, Zhengfei Wang, Hongming Weng, Lin Li, Tao Wu, Xianhui Chen, and Changgan Zeng
For solids, the dispersionless flat band has long been recognized as an ideal platform for achieving intriguing quantum phases. However, experimental progress in revealing flat-band physics has so far been achieved mainly in artificially engineered systems represented as magic-angle twisted bilayer …
[Phys. Rev. Lett. 128, 096601] Published Mon Feb 28, 2022
Author(s): Petar Tomić, Peter Rickhaus, Aitor Garcia-Ruiz, Giulia Zheng, Elías Portolés, Vladimir Fal’ko, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, Thomas Ihn, and Folkert K. de Vries
Magnetotransport oscillations in twisted double bilayer graphene exhibit scattering between minivalleys that depends on both electron-phonon and electron-electron effects.
[Phys. Rev. Lett. 128, 057702] Published Fri Feb 04, 2022
Author(s): Michael Schüler, Tommaso Pincelli, Shuo Dong, Thomas P. Devereaux, Martin Wolf, Laurenz Rettig, Ralph Ernstorfer, and Samuel Beaulieu
Complete characterization of certain quantum materials requires knowledge of the complex wave functions that describe electrons in the solid. A new measurement methodology provides deep insights into that information.
[Phys. Rev. X 12, 011019] Published Fri Jan 28, 2022
Author(s): Ying-Ming Xie, Cheng-Ping Zhang, Jin-Xin Hu, Kin Fai Mak, and K. T. Law
Moiré heterobilayer transition metal dichalcogenides (TMDs) emerge as an ideal system for simulating the single-band Hubbard model and interesting correlated phases have been observed in these systems. Nevertheless, the moiré bands in heterobilayer TMDs were believed to be topologically trivial. Rec…
[Phys. Rev. Lett. 128, 026402] Published Tue Jan 11, 2022