Strain Engineering of Correlated Charge-Ordered Phases in 1T-TaS2 Strain engineering is a powerful strategy for controlling the structural and electronic properties of two-dimensional materials, particularly in systems hosting charge density wave (CDW) order. In this work, we apply uniaxial tensile and compressive strain to thin 1T-TaS2 flakes using a flexible, device-compatible platform and systematically investigate the strain-dependent behavior of the nearly commensurate (NC) to incommensurate (IC) CDW phase transition. This transition is driven by Joule heating at room temperature. Electrical transport measurements reveal that both the switching threshold voltage and the resistance of the NC-CDW phase exhibit clear, reversible strain dependence. Furthermore, we identify a quadratic dependence between the strain-induced resistance change and the threshold voltage, confirming that piezoresistive modulation governs the strain tunability of the phase transition. We demonstrate a room-temperature, electrical readout strain and displacement sensor with a threshold-like response in a programmable window. These results highlight the potential of 1T-TaS2 for on-chip sensing of strain and displacement.

🩹Strain Engineering of Correlated Charge-Ordered Phases in 1T-TaS2
✍️New paper (and cover) by #2dfoundry pubs.acs.org/doi/10.1021/...

Natural Layered Phlogopite Dielectric for Ultrathin Two-Dimensional Optoelectronics The integration of high-dielectric-constant (high-κ) materials with two-dimensional (2D) semiconductors is promising to overcome performance limitations and reach their full theoretical potential. Here, we show that naturally occurring phlogopite mica, exfoliated into ultrathin flakes, can serve as a robust high-κ dielectric layer for transition metal dichalcogenide-based 2D electronics and optoelectronics. The wide band gap (∼4.8 eV), high dielectric constant (∼11), and large breakdown field (>10 MV cm–1) of phlogopite enable transistors with subthreshold swings down to 100 mV dec–1, minimal hysteresis (∼30–60 mV), and interface trap densities comparable to those of state-of-the-art oxide dielectrics. Moreover, phototransistors built upon monolayer molybdenum disulfide (MoS2) and phlogopite exhibit responsivities up to 3.3 × 104 AW–1 and detectivities close to 1010 Jones, surpassing devices based on conventional gate insulators. We further demonstrate the versatility of this natural dielectric by integrating phlogopite/MoS2 heterostructures into NMOS inverters, showcasing robust voltage gains and low-voltage operation. Our findings establish phlogopite as a promising, earth-abundant dielectric for next-generation 2D transistor technologies and high-performance photodetection.

🔎Natural Layered Phlogopite Dielectric for Ultrathin Two-Dimensional Optoelectronics
📜New paper at ACS Nano
🤝A fruitful collaboration between #2dfoundry & #Esisna groups at ICMM pubs.acs.org/doi/10.1021/...

Yaiza Aznar joins the 2D Foundry group as a new PhD researcher She studied her Bachelor’s degree in Physics at the Autonomous University of Madrid, where she joined the Condensed Matter Department to work on superconducting 2D materials during her thesis.

Let us introduce you to Yaiza Aznar, a new PhD Researcher at the #2DFoundry group at ICMM
www.icmm.csic.es/en/new-peopl...

Meet Nuria Jiménez Arévalo, a new Juan de la Cierva Fellow at the Materials Science Institute of Madrid, where she is now part of the #2DFoundry Group.

She completed her PhD at Universidad Autónoma de Madrid in July 2023 within the MIRE group.

www.icmm.csic.es/en/new-peopl...

Kutay Ozyurt starts his PhD at the 2D Foundry He recently joined the Muñoz Lab, 2D Foundry at ICMM as a PhD student. His research focuses on nanoscale thermal conductivity.

🤝Meet Kutay Ozyurt, who is starting his PhD at the #2dfoundry

www.icmm.csic.es/en/new-peopl...

Rafael Luque joins 2D Foundry as a new postdoctoral researcher He comes from LMU Munich and ICFO in Barcelona: he completed his PhD between these two institutions, receiving his PhD in Photonics from ICFO with the international doctorate mention.

👏Have you met Rafa Luque Merino? He is a new postdoctoral researcher at the #2dfoundry group with prof. Andrés Castellanos-Gómez

😊 Meet him here!

www.icmm.csic.es/en/new-peopl...

Xinming Xing, new postdoctoral researcher with Miguel Muñoz Rojo Image Xinming Xing was born in a coastal city in

🤝Xinming Xing was born in a coastal city in Shandong province of China, the hometown of Confucius, and now is working at the #2dfoundry as a new postdoctoral researcher with Miguel Muñoz Rojo
✌️Meet him here:
www.icmm.csic.es/en/new-peopl...

Zhang Ying, new PhD researcher at 2d Foundry This young researcher is from China and joined the Material Science Institute of Madrid two months ago. She is now a Ph.D. researcher in the 2D Foundry group as a PhD researcher.

¡Seguimos presentando a nuevas compañeras!
Ella es Zhang Ying, investigadora predoctoral en el grupo #2dFoundry www.icmm.csic.es/en/new-peopl...

Mauro Ramos, new JAE Intro at the Miguel Muñoz Rojo lab He is a Materials Engineer coming from the UCM. His work is focused on synthesizing and fabricating electronic devices using new 2D transition metals carbides and nitrides collaborating with Miguel Mu...

🤝Meet Mauro Ramos, a new #JAEIntro_CSIC at the Miguel Muñoz Rojo lab at #2dfoundry group
www.icmm.csic.es/en/new-peopl...

Work by our #2dFoundry group!

📜Check out our latest covers!
✅By Andrés Castellanos and the #2dFoundry team
✅ By @amparorc.bsky.social
See all of them here:
www.icmm.csic.es/en/investiga...

Elvira Tornero Gasca joins 2D Foundry group She will work with Miguel Muñoz.

😎She is from Guadalajara, Spain, and she studied Physics at the Universidad Autónoma de Madrid. Now, Elvira Tornero Gasca is a new member of the #2dfoundry group at the ICMM-CSIC as a PhD researcher with Miguel Muñoz Rojo
www.icmm.csic.es/en/new-peopl...