Condensed Matter Physics
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Steeeve
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PHYSICS
Condensed Matter Physics
High-Temperature Superconductivity
Ceramic materials defied expectations by becoming superconductors at surprisingly high temperatures
44 hours ago
0
What was the key consequence of discovering superconductivity above the boiling point of liquid nitrogen?
It enabled more practical and cost-effective cooling methods for superconductors.
It proved that superconductivity can occur at room temperature.
It showed that all ceramics are superconductors at low temperatures.
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Steve_Alias
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Condensed Matter Physics
Bose-Einstein Condensate
Quantum waves merge into a single entity, defying classical physics at near absolute zero
9 days ago
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What fundamental property of bosons allows the formation of a Bose-Einstein condensate at ultra-low temperatures?
Bosons repel each other strongly, preventing them from occupying the same state.
Bosons can occupy the same quantum state simultaneously, enabling macroscopic quantum phenomena.
Bosons behave like classical particles and do not exhibit quantum interference.
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PistonHeads
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PHYSICS
Condensed Matter Physics
Ice III
Water's hidden identity revealed in the dense, mysterious Ice III phase
9 days ago
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What key factor differentiates Ice III from ordinary ice (Ice Ih) in terms of physical properties?
Ice III is denser and forms under high pressure and low temperature conditions.
Ice III forms at standard atmospheric pressure but at higher temperatures than Ice Ih.
Ice III is just another name for ordinary ice and has the same molecular structure.
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Nellieger
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Condensed Matter Physics
Semiconductor Physics
Semiconductors' tunable conductivity powers the digital age's core technology
6 Feb 2026
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What key process allows semiconductors to have adjustable electrical conductivity?
Changing the temperature of the semiconductor material
Doping by adding impurities to the crystal structure
Applying a magnetic field to the semiconductor
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Peter_Fonda
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Condensed Matter Physics
Lattice Vibrations and Phonons
Phonons reveal how quantized vibrations govern heat and sound in solids
5 Feb 2026
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How do phonons influence the thermal conductivity of a solid?
Phonons carry vibrational energy through the lattice, enabling heat transfer.
Phonons block electron movement, reducing thermal conductivity.
Phonons are unrelated to heat transfer and only affect electrical properties.
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Peter_Fonda
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PHYSICS
Condensed Matter Physics
Cooper Pairs
Cooper pairs enable electrons to flow without resistance, unlocking superconductivity at low temperatures
1 Feb 2026
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What role do lattice vibrations (phonons) play in the formation of Cooper pairs in superconductors?
They mediate an attractive interaction between electrons, enabling them to pair up despite their repulsion.
They cause electrons to repel each other more strongly, preventing Cooper pair formation.
They have no effect on electron interactions and are unrelated to Cooper pair formation.
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Peter_Fonda
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Electron-Phonon Interaction
Electron-phonon interactions enable electrons to pair up and flow without resistance in superconductors
28 Jan 2026
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How does the electron-phonon interaction lead to the formation of Cooper pairs in superconductors?
By increasing the repulsion between electrons, forcing them to pair up to minimize energy
By causing an effective attraction between electrons through lattice distortions that mediate pairing at low temperatures
By directly binding electrons through electromagnetic forces without involving the lattice
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PHYSICS
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Bose-Einstein Condensate
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Bose-Einstein condensates reveal quantum phenomena on a macroscopic scale near absolute zero
28 Jan 2026
Bose-Einstein condensates reveal quantum phenomena on a macroscopic scale near absolute zero A Bose-Einstein condensate (BEC) is a unique state of matter that occurs at extremely low temperatures, close to absolute zero (0 K). It...
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Perfect_Peter_John_
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Semiconductor Physics
Semiconductors bridge the gap between conductors and insulators enabling modern electronics
28 Jan 2026
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What is the primary effect of doping in a semiconductor material?
It introduces impurities that create free charge carriers, modifying conductivity.
It changes the crystal structure to make the material a perfect insulator.
It converts the semiconductor into a superconductor at room temperature.
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Peter_Fonda
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PHYSICS
Condensed Matter Physics
Peierls Transition in One-Dimensional Crystals
Peierls transition reveals how one-dimensional crystals spontaneously distort to lower energy states
25 Jan 2026
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What is the primary consequence of the Peierls transition on the electronic structure of a one-dimensional crystal?
It increases the electrical conductivity by creating more free electrons.
It opens an energy gap at the Fermi surface, stabilizing the distorted lattice.
It causes the crystal to become perfectly periodic without any distortion.
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Steve_Alias
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Condensed Matter Physics
Exciton
Excitons enable energy transport in materials without carrying electric charge, key to optoelectronics
24 Jan 2026
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What is the primary reason excitons are electrically neutral despite involving charged particles?
Because excitons do not involve any charged particles at all.
Because the electron and the electron hole have opposite charges that cancel each other out.
Because the electron and hole are too far apart to interact electrically.
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Steve_Alias
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Quasiparticle
Quasiparticles reveal how complex solids behave like collections of new, effective particles
21 Jan 2026
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How do quasiparticles simplify the study of complex many-body systems in condensed matter physics?
By ignoring all interactions between particles in the system
By treating each fundamental particle independently without considering collective effects
By representing collective excitations as particle-like entities with effective properties
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PHYSICS
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Exciton Energy Transfer
Excitons transport energy efficiently in materials without moving electric charge, enabling advanced optoelectronics
18 Jan 2026
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What is the primary reason excitons can transport energy without transporting net electric charge?
Because excitons are free electrons moving through the material carrying charge
Because excitons are electrically neutral quasiparticles formed by an electron and an electron hole bound together
Because excitons are ions that carry both energy and charge simultaneously
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