Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors

N. Nakai, P. Miranović, Masanori Ichioka, H. F. Hess, K. Uchiyama, H. Nishimori, S. Kaneko, N. Nishida, K. Machida

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

It is demonstrated theoretically and experimentally that the low energy density of states N(E) is described by a singular V-shape form N(E)=N0(H)+α|E|+O(E2) for all clean superconductors in a vortex state, irrespective of the underlying gap structure. The linear term α|E| which has not been recognized so far is obtained by exactly evaluating the vortex contribution. Based on microscopic Eilenberger theory N(E) is evaluated for the isotropic gap, line, and point-node gaps to yield a V-shape N(E). Scanning tunneling spectroscopy-STM experiments on NbSe2 and YNi2B2C give direct evidence for this. We provide arguments on the significance of this finding and on the relevance to other experiments.

Original languageEnglish
Article number147001
JournalPhysical Review Letters
Volume97
Issue number14
DOIs
Publication statusPublished - 2006

Fingerprint

vortices
flux density
scanning
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors. / Nakai, N.; Miranović, P.; Ichioka, Masanori; Hess, H. F.; Uchiyama, K.; Nishimori, H.; Kaneko, S.; Nishida, N.; Machida, K.

In: Physical Review Letters, Vol. 97, No. 14, 147001, 2006.

Research output: Contribution to journalArticle

Nakai, N, Miranović, P, Ichioka, M, Hess, HF, Uchiyama, K, Nishimori, H, Kaneko, S, Nishida, N & Machida, K 2006, 'Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors', Physical Review Letters, vol. 97, no. 14, 147001. https://doi.org/10.1103/PhysRevLett.97.147001
Nakai, N. ; Miranović, P. ; Ichioka, Masanori ; Hess, H. F. ; Uchiyama, K. ; Nishimori, H. ; Kaneko, S. ; Nishida, N. ; Machida, K. / Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors. In: Physical Review Letters. 2006 ; Vol. 97, No. 14.
@article{aafe343ffb1a4faf911a549609a51701,
title = "Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors",
abstract = "It is demonstrated theoretically and experimentally that the low energy density of states N(E) is described by a singular V-shape form N(E)=N0(H)+α|E|+O(E2) for all clean superconductors in a vortex state, irrespective of the underlying gap structure. The linear term α|E| which has not been recognized so far is obtained by exactly evaluating the vortex contribution. Based on microscopic Eilenberger theory N(E) is evaluated for the isotropic gap, line, and point-node gaps to yield a V-shape N(E). Scanning tunneling spectroscopy-STM experiments on NbSe2 and YNi2B2C give direct evidence for this. We provide arguments on the significance of this finding and on the relevance to other experiments.",
author = "N. Nakai and P. Miranović and Masanori Ichioka and Hess, {H. F.} and K. Uchiyama and H. Nishimori and S. Kaneko and N. Nishida and K. Machida",
year = "2006",
doi = "10.1103/PhysRevLett.97.147001",
language = "English",
volume = "97",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",

}

TY - JOUR

T1 - Ubiquitous V-shape density of states in a mixed state of clean limit type II superconductors

AU - Nakai, N.

AU - Miranović, P.

AU - Ichioka, Masanori

AU - Hess, H. F.

AU - Uchiyama, K.

AU - Nishimori, H.

AU - Kaneko, S.

AU - Nishida, N.

AU - Machida, K.

PY - 2006

Y1 - 2006

N2 - It is demonstrated theoretically and experimentally that the low energy density of states N(E) is described by a singular V-shape form N(E)=N0(H)+α|E|+O(E2) for all clean superconductors in a vortex state, irrespective of the underlying gap structure. The linear term α|E| which has not been recognized so far is obtained by exactly evaluating the vortex contribution. Based on microscopic Eilenberger theory N(E) is evaluated for the isotropic gap, line, and point-node gaps to yield a V-shape N(E). Scanning tunneling spectroscopy-STM experiments on NbSe2 and YNi2B2C give direct evidence for this. We provide arguments on the significance of this finding and on the relevance to other experiments.

AB - It is demonstrated theoretically and experimentally that the low energy density of states N(E) is described by a singular V-shape form N(E)=N0(H)+α|E|+O(E2) for all clean superconductors in a vortex state, irrespective of the underlying gap structure. The linear term α|E| which has not been recognized so far is obtained by exactly evaluating the vortex contribution. Based on microscopic Eilenberger theory N(E) is evaluated for the isotropic gap, line, and point-node gaps to yield a V-shape N(E). Scanning tunneling spectroscopy-STM experiments on NbSe2 and YNi2B2C give direct evidence for this. We provide arguments on the significance of this finding and on the relevance to other experiments.

UR - http://www.scopus.com/inward/record.url?scp=33749412690&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749412690&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.97.147001

DO - 10.1103/PhysRevLett.97.147001

M3 - Article

AN - SCOPUS:33749412690

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

M1 - 147001

ER -