Related Experiment Video
Updated: Jan 3, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.2K
Incoherent strange metal sharply bounded by a critical doping in Bi2212
Su-Di Chen1,2, Makoto Hashimoto3, Yu He1,2
1Departments of Applied Physics and Physics, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|November 30, 2019
Summary
The strange metal phase in cuprate superconductors transitions to a conventional metal with quasiparticles at a critical doping level. This suggests the strange metal is a distinct state preceding the pseudogap, challenging current theories.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Macroscopic properties of normal metals are explained by quasiparticles.
- Cuprate high-temperature superconductors exhibit an anomalous metallic state above their transition temperature, termed the 'strange metal'.
- Understanding the nature of the strange metal and its relationship to other electronic phases is a key challenge.
Purpose of the Study:
- To investigate the electronic properties of the strange metal phase in cuprate superconductors.
- To determine the critical doping concentration (p_c) where the strange metal behavior changes.
- To explore the connection between the strange metal, the pseudogap, and superconducting fluctuations.
Main Methods:
- Utilized angle-resolved photoemission spectroscopy (ARPES) to probe the electronic structure.
- Analyzed the spectral function to identify the presence or absence of quasiparticles.
- Investigated the behavior of the pseudogap and superconducting fluctuations as a function of doping.
Main Results:
- Observed an abrupt reconstruction of the strange metal into a conventional metal with quasiparticles near the Brillouin zone boundary at p_c ~ 0.19.
- Found that the pseudogap discontinuously collapses at the same critical doping p_c.
- The spectral function of the strange metal is incoherent, while the reconstructed metal exhibits coherent quasiparticles.
Conclusions:
- The incoherent strange metal is a distinct electronic phase and a prerequisite for the pseudogap.
- These findings contradict existing theories of a quantum critical point driving the pseudogap.
- The critical doping p_c marks a fundamental phase transition in cuprate superconductors.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.5K
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.9K
Related Concept Videos
01:22Semiconductors
1.3K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.3K
01:27Biasing of Metal-Semiconductor Junctions
500
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
500
02:42Valence Bond Theory
10.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.9K
03:02Colors and Magnetism
13.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.7K
02:35Band Theory
16.9K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
16.9K
02:37Metallic Solids
20.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.4K