Density of states of liquid Cu

Chang, Ki Sung; Sher, A.; Petzinger, K. G.; Weisz, Gideon

doi:10.1103/physrevb.12.5506

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…In the density of states (inset in Fig. 1a), a local minimum is formed at a resonance energy (E r ) 5,[9][10][11][12] , which is the "pseudogap" coined by Mott 13,14 . This backward-bending band dispersion with pseudogap should be observable by means of angle-resolved photoemission spectroscopy (ARPES).…”

Section: Main Textmentioning

confidence: 99%

“…The key feature of these ndings (backward-bending band dispersion and gaplike features) can be naturally explained by the characteristic band structure of liquid metals predicted in theory [1][2][3][4][5][6][7][8][9][10][11][12] . We employ a single-site (structure-independent) model 12 for multiple scattering (Methods), in which each ion is assumed to be a spherical step potential U s whose depth is V 0 and radius is r s (Fig.…”

Section: Main Textmentioning

confidence: 99%

“…3a,d). This is accompanied by changes in the density of states 5,[9][10][11][12] that is roughly proportional to the energy derivative of Re(Dk) (Fig. 3h).…”

Section: Main Textmentioning

confidence: 99%

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Pseudogap in a crystalline insulator doped by disordered metals

Ryu

Huh

Park

et al. 2021

Nature

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A key to understand how electrons behave in crystalline solids is the band structure that connects the energy of electron waves to their wavenumber (k). Even in the phase of matter with only short-range order (liquid), the coherent part of electron waves still possesses a band structure. Theoretical models for the band structure of liquid metals were formulated more than 5 decades ago 1-15 , but so far, it has remained unobserved experimentally. Here, we reveal the band structure of liquid metals using the interface between liquid dopants (alkali metals) and a crystalline insulator (black phosphorus). We nd that the conventional parabolic band structure of free electrons bends back towards zero k with the isotropic pseudogap of 30-240 meV from the Fermi level. This is the k renormalization caused by resonance scattering that leads to the formation of quasi-bound states in the scattering potential of liquid alkalimetal ions. The depth of this potential tuned by different kinds of alkali metal (Na, K, Rb, and Cs) allows us to classify the pseudogap of p-wave and d-wave resonance. Our results provide a key clue to the pseudogap phase of various materials [16][17][18][19][20] , a common aspect of which is the crystalline insulator doped by disordered (liquid) dopants.

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Section: Main Textmentioning

confidence: 99%

Section: Main Textmentioning

confidence: 99%

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Pseudogap in a crystalline insulator doped by disordered metals

Ryu

Huh

Park

et al. 2021

Nature

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Section: Main Textmentioning

confidence: 99%

“…Theoretical model for liquid metals. We employ the theory of multiple scattering [1][2][3][4][5][6][7][8][9][10][11][12] by each ion assumed as a spherical step potential whose depth is V 0 and radius is r s (Fig. 3a).…”

Section: Main Textmentioning

confidence: 99%

Unconventional band structure and pseudogap of liquid metals on a crystalline insulator

Kim

Ryu

Huh

et al. 2020

Preprint

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A key to understand how electrons behave in crystalline solids is the band structure that connects the energy of electron waves to their wavenumber (k). Even in the phase of matter with only short-range order (liquid), the coherent part of electron waves still possesses a band structure. Theoretical models for the band structure of liquid metals were formulated more than 5 decades ago1-15, but so far, it has remained unobserved experimentally. Here, we reveal the band structure of liquid metals using the interface between liquid dopants (alkali metals) and a crystalline insulator (black phosphorus). We find that the conventional parabolic band structure of free electrons bends back towards zero k with the isotropic pseudogap of 30-240 meV from the Fermi level. This is the k renormalization caused by resonance scattering that leads to the formation of quasi-bound states in the scattering potential of liquid alkali-metal ions. The depth of this potential tuned by different kinds of alkali metal (Na, K, Rb, and Cs) allows us to classify the pseudogap of p-wave and d-wave resonance. Our results provide a key clue to the pseudogap phase of various materials16-20, a common aspect of which is the crystalline insulator doped by disordered (liquid) dopants.

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