BCS-like density of states in superconducting A(3)C(60) surfaces

R. Hesper; L.H Tjeng; A. Heeres; G.A Sawatzky

doi:10.1103/physrevlett.85.1970

BCS-like density of states in superconducting A(3)C(60) surfaces

R. Hesper
, L.H Tjeng
, A. Heeres
, G.A Sawatzky

Surfaces and Thin Films

Research output: Contribution to journal › Article › Academic › peer-review

32 Citations (Scopus)

Abstract

We report on an ultrahigh resolution photoemission study on the topmost molecular layer of K3C60 and Rb3C60 films below and above the superconducting transition temperature TC. We observed not only clear evidence for the opening of the superconducting gap, but also a modification in the photoemission line shape consistent with a change from a normal-metallic to a BCS-like density of states, including the formation of a condensation peak. The data can be accurately modeled by a BCS-type function with a gap Δ derived from TC in the weak-coupling limit ( 2Δ/kBTC=3.53).

Original language	English
Pages (from-to)	1970-1973
Number of pages	4
Journal	Physical Review Letters
Volume	85
Issue number	9
DOIs	https://doi.org/10.1103/physrevlett.85.1970
Publication status	Published - 2000

Keywords

ELECTRON-TUNNELING SPECTROSCOPY
SINGLE-CRYSTALLINE RB3C60
ENERGY-GAP
FULLERIDES
K3C60
C-60
FULLERENES
PHONON

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BCS-like density of states in superconducting A(3)C(60) surfaces
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title = "BCS-like density of states in superconducting A(3)C(60) surfaces",

abstract = "We report on an ultrahigh resolution photoemission study on the topmost molecular layer of K3C60 and Rb3C60 films below and above the superconducting transition temperature TC. We observed not only clear evidence for the opening of the superconducting gap, but also a modification in the photoemission line shape consistent with a change from a normal-metallic to a BCS-like density of states, including the formation of a condensation peak. The data can be accurately modeled by a BCS-type function with a gap Δ derived from TC in the weak-coupling limit ( 2Δ/kBTC=3.53).",

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author = "R. Hesper and L.H Tjeng and A. Heeres and G.A Sawatzky",

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T1 - BCS-like density of states in superconducting A(3)C(60) surfaces

AU - Hesper, R.

AU - Tjeng, L.H

AU - Heeres, A.

AU - Sawatzky, G.A

N1 - Journal AUG 28 348BW PHYS REV LETT

PY - 2000

Y1 - 2000

N2 - We report on an ultrahigh resolution photoemission study on the topmost molecular layer of K3C60 and Rb3C60 films below and above the superconducting transition temperature TC. We observed not only clear evidence for the opening of the superconducting gap, but also a modification in the photoemission line shape consistent with a change from a normal-metallic to a BCS-like density of states, including the formation of a condensation peak. The data can be accurately modeled by a BCS-type function with a gap Δ derived from TC in the weak-coupling limit ( 2Δ/kBTC=3.53).

AB - We report on an ultrahigh resolution photoemission study on the topmost molecular layer of K3C60 and Rb3C60 films below and above the superconducting transition temperature TC. We observed not only clear evidence for the opening of the superconducting gap, but also a modification in the photoemission line shape consistent with a change from a normal-metallic to a BCS-like density of states, including the formation of a condensation peak. The data can be accurately modeled by a BCS-type function with a gap Δ derived from TC in the weak-coupling limit ( 2Δ/kBTC=3.53).

KW - ELECTRON-TUNNELING SPECTROSCOPY

KW - SINGLE-CRYSTALLINE RB3C60

KW - ENERGY-GAP

KW - FULLERIDES

KW - K3C60

KW - C-60

KW - FULLERENES

KW - PHONON

U2 - 10.1103/physrevlett.85.1970

DO - 10.1103/physrevlett.85.1970

M3 - Article

SN - 0031-9007

VL - 85

SP - 1970

EP - 1973

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

ER -

BCS-like density of states in superconducting A(3)C(60) surfaces

Abstract

Keywords

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