Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212

doi:10.1126/science.aaw8850

Title: Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212

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Abstract

In normal metals, macroscopic properties are understood using the concept of quasiparticles. In the cuprate high-transition-temperature superconductors, the metallic state above the highest transition temperature is anomalous and known as the “strange metal”. Here we study this state using angle-resolved photoemission spectroscopy. With increasing doping across a temperature-independent critical value pc ~ 0.19, we observe that near the Brillouin zone boundary, the strange metal characterized by an incoherent spectral function abruptly reconstructs into a more conventional metal with quasiparticles. Above the temperature of superconducting fluctuations, we find that the pseudogap also discontinuously collapses at the very same pc. These observations suggest that the incoherent strange metal is a distinct state with the pseudogap as its low-temperature descendant, incompatible with existing pseudogap quantum critical point scenarios.

Authors:

Chen, Su-Di ^[1]

SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)

Publication Date:: 2019-01-01

Research Org.:: slac

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22),; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Stanford Institute for Materials and Energy Sciences (SIMES); USDOE

OSTI Identifier:: 1576078

Alternate Identifier(s):: OSTI ID: 1574004

Grant/Contract Number:: AC02-76SF00515

Resource Type:: Published Article

Journal Name:: Science

Additional Journal Information:: Journal Volume: 366; Journal Issue: 6469; Journal ID: ISSN 0036--8075

Country of Publication:: United States

Language:: English

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                    Chen, Su-Di. Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212.  United States: N. p., 2019. 
        Web.  doi:10.1126/science.aaw8850.

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                    Chen, Su-Di. Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212.  United States.  doi:10.1126/science.aaw8850.

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                    Chen, Su-Di. Tue .  
        "Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212".  United States.  doi:10.1126/science.aaw8850.

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@article{osti_1576078,

  title        = {Incoherent Strange Metal Sharply Bounded by a Critical Doping in Bi2212},

  author       = {Chen, Su-Di},

  abstractNote = {In normal metals, macroscopic properties are understood using the concept of quasiparticles. In the cuprate high-transition-temperature superconductors, the metallic state above the highest transition temperature is anomalous and known as the “strange metal”. Here we study this state using angle-resolved photoemission spectroscopy. With increasing doping across a temperature-independent critical value pc ~ 0.19, we observe that near the Brillouin zone boundary, the strange metal characterized by an incoherent spectral function abruptly reconstructs into a more conventional metal with quasiparticles. Above the temperature of superconducting fluctuations, we find that the pseudogap also discontinuously collapses at the very same pc. These observations suggest that the incoherent strange metal is a distinct state with the pseudogap as its low-temperature descendant, incompatible with existing pseudogap quantum critical point scenarios.},

  doi          = {10.1126/science.aaw8850},

  journal      = {Science},

  number       = 6469,

  volume       = 366,

  place        = {United States},

  year         = {2019},

  month        = {1}

}

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