Superconducting penetration depth through a Van Hove singularity: Sr2RuO4 under uniaxial stress

被引：8

作者：

Mueller, Eli ^{[1
,2
]}

Iguchi, Yusuke ^{[1
,3
]}

Jerzembeck, Fabian ^{[4
]}

Rodriguez, Jorge O. ^{[5
]}

Romanelli, Marisa ^{[5
]}

Abarca-Morales, Edgar ^{[4
]}

Markou, Anastasios ^{[4
,6
]}

Kikugawa, Naoki ^{[7
]}

Sokolov, Dmitry A. ^{[4
]}

Oh, Gwansuk ^{[8
,9
]}

Hicks, Clifford W. ^{[1
,4
,10
]}

Mackenzie, Andrew P. ^{[1
,4
,11
]}

Maeno, Yoshiteru ^{[1
,2
,8
,12
]}

Madhavan, Vidya ^{[5
]}

Moler, Kathryn A. ^{[1
,2
,3
]}

机构：

[1] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[2] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[4] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany

[5] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[6] Univ Ioannina, Dept Phys, Ioannina 45110, Greece

[7] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050003, Japan

[8] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[9] Pohang Univ Sci & Technol POSTECH, Dept Phys, Pohang 790784, South Korea

[10] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, England

[11] Univ St Andrews, Scottish Univ Phys Alliance, Sch Phys & Astron, St Andrews KY16 9SS, Scotland

[12] Kyoto Univ, Toyota Riken Kyoto Univ Res Ctr TRiKUC, Kyoto 6068501, Japan

来源：

PHYSICAL REVIEW B | 2024年 / 110卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

QUASI-PARTICLE INTERFERENCE; DEPENDENCE; SCATTERING;

D O I：

10.1103/PhysRevB.110.L100502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A plethora of experiments in Sr2RuO4 have reached conflicting conclusions about the symmetry of the superconducting gap. To probe the gap's structure ink space, we use strain to continuously tune the band structure through a Van Hove singularity (VHS) while imaging the superconductivity with scanning superconducting quantum interference device microscopy. We find that the superfluid density peaks at the VHS and that the temperature dependence of the penetration depth is T-2 quadratic over the entire measured range of strain e . These results are consistent with a gap structure that has vertical line nodes, experimentally confirming that nonlocal effects in the Meissner screening can lead to T-2 behavior and clarifying the nature of the low-energy excitations in Sr2RuO4.

引用

页数：7

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