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Sign of the Gap Temperature Dependence in CsPb(Br,Cl) Nanocrystals Determined by Cs-Rattler-Mediated Electron-Phonon Coupling.
J Phys Chem Lett
January 2025
Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain.
So far, the striking sign reversal in the near-ambient slope of the gap temperature dependence of colloidal CsPbCl perovskite nanocrystals (NCs) compared to its Br counterpart remains unresolved. Pure bromide NCs exhibit a linear gap increase with increasing temperature, to which thermal expansion and electron-phonon interaction equally contribute. In contrast, the temperature slope for the chlorine compound gap is clearly negative.
View Article and Find Full Text PDFMoiré-driven topological electronic crystals in twisted graphene.
Nature
January 2025
Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada.
In a dilute two-dimensional electron gas, Coulomb interactions can stabilize the formation of a Wigner crystal. Although Wigner crystals are topologically trivial, it has been predicted that electrons in a partially filled band can break continuous translational symmetry and time-reversal symmetry spontaneously, resulting in a type of topological electron crystal known as an anomalous Hall crystal. Here we report signatures of a generalized version of the anomalous Hall crystal in twisted bilayer-trilayer graphene, whose formation is driven by the moiré potential.
View Article and Find Full Text PDFThe anomalous origin of the left coronary artery from the distal pulmonary artery with an interarterial course: a case description.
Quant Imaging Med Surg
January 2025
Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
A constellation of anatomical variation: middle scalene, wrist extensor, and aortic arch variants share embryological origins in cervical somites.
Anat Cell Biol
January 2025
Department of Anatomy and Neurobiology, College of Medicine and Health Sciences, National University of Science and Technology, Sohar, Oman.
During dissection of a 70-year-old male donor, several anatomical variations were observed, highlighted by a bilateral variant middle scalene muscle in the superolateral thoracic wall. The variant scalene muscle was traced from the transverse processes of cervical vertebrae to the fourth rib with a pronounced fascial slip. The elongated middle scalene muscle was thick in girth and abnormally wide at its insertion (56.
View Article and Find Full Text PDFSub-coronary ROSS operation in a young man with quadricuspid aortic valve and anomalous aortic origin of the left coronary artery: A case report.
Medicine (Baltimore)
January 2025
Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
Rationale: Quadricuspid aortic valve (QAV) is a rare condition with a very low incidence. Anomalous aortic origin of a coronary artery (AAOCA) is the most prevalent form of coronary anomaly. One variant of AAOCA is the anomalous aortic origin of the left coronary artery from the right coronary sinus (L-AAOCA).
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