#CondensedMatterPhysics

2025-05-25

Deep, chewy, rich, digestible. A cracking good job by #ScienceJournalist Zack Savitsky.

''But the implications go beyond just building better superconductors. A theory that explains strange metals may force a fundamental rethinking of how electricity works in all materials. It might subsume the standard theory the way general relativity, with its curved spacetime, subsumed Isaac Newton’s theory of gravity—and prove just as unsettling. Strange metals are forcing physicists to ask whether the very idea of an electron, or any particle for that matter, is an oversimplification of what’s really going on. “The violation of the standard theory of solids in these strange metals is so dramatic—it’s in your face,” says Qimiao Si, a physicist at Rice University who collaborates with Paschen. “There’s no question there’s new physics.”''

#StrangeMetals
#conductivity
#electrons
#CondensedMatterPhysics

science.org/content/article/st

2025-05-13

We just submitted the first QUINTO draft of paper to a journal. Let's see what the editors and reviewers think.

The paper is about fractional quantum Hall states in atomic arrays. Here is the popular summary we submitted alongside:

"When atoms are arranged in a regular, dense array, their response to light can change drastically. The photons can bounce between the atoms, getting absorbed and re-emitted again and interfering with themselves. This field of quantum optics with atomic arrays is of active interest. Due to interactions, the limit of many absorbed photons generally remains hard to model, but at the same time may result in new, counterintuitive physical phenomena. In the search for ways to understand such systems, we can look for analogies in condensed matter physics, where the behavior of many interacting particles (electrons in this case) has been studied for decades. Here, we report on finding such an analogy between the behavior of few photons absorbed by an array and peculiar many-electron quantum states known as fractional quantum Hall (FQH) states. FQH states display many counterintuitive properties -- for example the electrons behave like they decomposed into pieces (e.g. "one third of an electron"), even though we know that in reality they are indivisible. Now we know that photons in arrays can behave similarly."

[1/2]

#physics #science #CondensedMatterPhysics #CondensedMatter #condMat #QuantumOptics #Quantum @physics

The abstract of the paper with "PREPRINT" written with big letters on top of it.
2025-05-01

This means many-particle effects are important, perhaps creating conditions for superconductivity, just by twisting two layers of graphene! Above are miniband structures I calculated for the angle being 2° - you can see Dirac cones with some dispersion - and 1.1°, a magic angle for which flat bands appear. [2/2]

#physics #graphene #CondensedMatterPhysics

2025-05-01

Did you know that if you put two sheets of graphene together and rotate them to a so-called "magic" angle, the innermost bands become flat - meaning the momentum doesn't depend on energy so the particles can change momentum without needing to gain or lose energy. [1/2]

#physics #graphene #CondensedMatterPhysics

A plot of band structure along a high symmetry momentum path in 2D for 2° twisted bilayer graphene. Notable features are the Dirac cones at K and K' with a slightly reduced velocity as compared to monolayer graphene.A plot of band structure along a high symmetry momentum path in 2D for 1.1° twisted bilayer graphene. The notable feature is that the velocity of the innermost bands has reduced so much that they are flat across the whole mini Brillouin zone.
Dr. Marie McNeelyPhDMarie@qoto.org
2025-03-31

In this new podcast episode, Dr. Jia “Leo” Li shares his research on emergent quantum phenomena in 2D materials, their thrilling recent discovery of a new type of particle, his path to becoming a successful scientist, challenges, advice, life outside the lab, and more!

peoplebehindthescience.com/dr-

#research #physics #CondensedMatterPhysics #particles #Science #STEM #podcast #sciencecommunication #scicomm

On the left side of the image, there is a headshot photo of Dr. Li. On the right, the text reads, "Episode 806 featuring Dr. Jia "Leo" Li. The cover art for our podcast appears below. The text on it reads, "People Behind the Science with Dr. Marie McNeely".
2024-12-20

I have a favour to ask of a condensed matter physicist on behalf of a friend.

If you class yourself as a "condensed matter physicist", or "condensed matter physics adjacent", would you mind giving me a ping?

Thanks.

(PS: Please boost for reach ... much obliged)

#Physics #CondensedMatterPhysics

2024-12-16

🔬In leap forward for #condensedmatterphysics, researchers reporting new #magnetic phase called #altermagnetism, 🧲 potentially revolutionizing #electronics 💻📱by significantly increasing speed & energy efficiency while reducing #environmental impact. #science #tech

thedebrief.org/researchers-unc

altermagnetism
2024-11-04

If you're interested in Anderson localization or random quantum circuits, don't miss the opportunity to discuss it with Prof. John Chalker from the University of Oxford, Department of Physics online under his new Enabla lecture here: enabla.com/pub/942/about

Prof. Chalker's introductory lecture covers topics such as the random matrix theory of Gaussian Wigner-Dyson ensembles, Anderson localisation with one-parameter scaling, and random quantum circuits. The focus is on the spectral form factor, entanglement entropy, and out-of-time-ordered correlators.

#CondensedMatterPhysics #QuantumPhysics #RandomMatrices #AndersonLocalization #OpenAccess #QuantumCircuits

"Introduction to random matrix theory, Anderson localisation, and random quantum circuits" by Prof. John Chalker on Enabla. Video, English, 3.3 hours
2024-06-10

Just finished a call where the concept of data paper was mentionned.

Any information about it?

Recommendation for journals that would accept them in condensed matter physics are welcome!

#OpenData #OpenScience #CondensedMatterPhysics #physics #AcademicChatter

2024-05-17

A five-lane superhighway for electrons has been created, paving the way for ultra-efficient electronics. This groundbreaking discovery is one of several significant advancements in condensed matter physics.

#CondensedMatterPhysics

phys.org/news/2024-05-physicis

Paul-Drude-Institutpdi
2024-03-14

📣 Online seminar at PDI: Exciton-polariton Continuous Time Crystal with an Optomechanical Clock

📅 On April 15 at 14:00 CET, Dr. Alejandro Fainstein will discuss the concept of time crystals (TCs). Dr. Fainstein is a senior researcher and Professor at Centro Atómico Bariloche and Instituto Balseiro in Bariloche, Argentina.

More: bit.ly/3TBUu90

Victoria Stuart 🇨🇦 🏳️‍⚧️persagen
2023-08-19

Pines' Demon: Physicists confirm 1956 prediction of massless, neutral composite particle
sciencedaily.com/releases/2023
Discussion: sciencedaily.com/releases/2023

Pines’ demon observed as 3D acoustic plasmon in Sr2RuO4
nature.com/articles/s41586-023

Pines' demon: en.wikipedia.org/wiki/Pines%27
* condensed matter physics
* quant. mech. excited states
* collective excitation of e- in different/out of phase energy bands
* collective excitations: magnon, phason, exciton

Max HeadroomJoel@qoto.org
2022-11-25

There's a related question I've struggled with - maybe you can help: How can one efficiently normalize a multi-fermion wave function composed of a determinant of single particle orbitals which are not orthogonal to each other?

#quantumchemistry #CondensedMatterPhysics
#physics

Sarah C.P. Williamssarahcpwilliams@scicomm.xyz
2022-11-09

Shuolong Yang of UChicago & colleagues discovered how a new material, MnBi6Te10, can be used to create #quantum highways along which electrons can move, potentially connecting #qubits in #topological quantum computers.

pme.uchicago.edu/news/electron

#physics #engineering #scicomm #CondensedMatterPhysics #NanoLetters #MaterialsScience #MaterialsEngineering

A molecular rendering of MnBi6Te10, in purple (tellurium), blue (bismuth) and green (manganese).

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