Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission

Shan Yu Liu, Wen Tao Zhang, Hong Ming Weng, Lin Zhao, Hai Yun Liu, Xiao Wen Jia, Guo Dong Liu, Xiao Li Dong, Jun Zhang, Zhi Qiang Mao, Chuang Tian Chen, Zu Yan Xu, Xi Dai, Zhong Fang, Xing Jiang Zhou

Research output: Contribution to journalArticle

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Abstract

High resolution angle-resolved photoemission measurements are carried out to systematically investigate the effect of cleaving temperature on the electronic structures and Fermi surfaces of Sr 2RuO 4. Unlike previous reports, which found that a high cleaving temperature can suppress the surface Fermi surface, we find that the surface Fermi surface remains obvious and strong in Sr 2RuO 4 cleaved at high temperature, even at room temperature. This indicates that cleaving temperature is not a key effective factor in suppressing surface bands. On the other hand, the bulk bands can be enhanced in an aged surface of Sr 2RuO 4 that has been cleaved and held for a long time. We have also carried out laser ARPES measurements on Sr 2RuO 4 by using a vacuum ultra-violet laser (photon energy at 6.994 eV) and found an obvious enhancement of bulk bands even for samples cleaved at low temperature. This information is important for realizing an effective approach to manipulating and detecting the surface and bulk electronic structure of Sr 2RuO 4. In particular, the enhancement of bulk sensitivity, along with the super-high instrumental resolution of VUV laser ARPES, will be advantageous in investigating fine electronic structure and superconducting properties of Sr 2RuO 4 in the future.

Original languageEnglish (US)
Article number067401
JournalChinese Physics Letters
Volume29
Issue number6
DOIs
StatePublished - Jun 1 2012

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Fermi surfaces
photoelectric emission
high resolution
electronic structure
temperature
augmentation
ultraviolet lasers
lasers
vacuum
sensitivity
photons
room temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Liu, Shan Yu ; Zhang, Wen Tao ; Weng, Hong Ming ; Zhao, Lin ; Liu, Hai Yun ; Jia, Xiao Wen ; Liu, Guo Dong ; Dong, Xiao Li ; Zhang, Jun ; Mao, Zhi Qiang ; Chen, Chuang Tian ; Xu, Zu Yan ; Dai, Xi ; Fang, Zhong ; Zhou, Xing Jiang. / Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission. In: Chinese Physics Letters. 2012 ; Vol. 29, No. 6.
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title = "Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission",
abstract = "High resolution angle-resolved photoemission measurements are carried out to systematically investigate the effect of cleaving temperature on the electronic structures and Fermi surfaces of Sr 2RuO 4. Unlike previous reports, which found that a high cleaving temperature can suppress the surface Fermi surface, we find that the surface Fermi surface remains obvious and strong in Sr 2RuO 4 cleaved at high temperature, even at room temperature. This indicates that cleaving temperature is not a key effective factor in suppressing surface bands. On the other hand, the bulk bands can be enhanced in an aged surface of Sr 2RuO 4 that has been cleaved and held for a long time. We have also carried out laser ARPES measurements on Sr 2RuO 4 by using a vacuum ultra-violet laser (photon energy at 6.994 eV) and found an obvious enhancement of bulk bands even for samples cleaved at low temperature. This information is important for realizing an effective approach to manipulating and detecting the surface and bulk electronic structure of Sr 2RuO 4. In particular, the enhancement of bulk sensitivity, along with the super-high instrumental resolution of VUV laser ARPES, will be advantageous in investigating fine electronic structure and superconducting properties of Sr 2RuO 4 in the future.",
author = "Liu, {Shan Yu} and Zhang, {Wen Tao} and Weng, {Hong Ming} and Lin Zhao and Liu, {Hai Yun} and Jia, {Xiao Wen} and Liu, {Guo Dong} and Dong, {Xiao Li} and Jun Zhang and Mao, {Zhi Qiang} and Chen, {Chuang Tian} and Xu, {Zu Yan} and Xi Dai and Zhong Fang and Zhou, {Xing Jiang}",
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doi = "10.1088/0256-307X/29/6/067401",
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Liu, SY, Zhang, WT, Weng, HM, Zhao, L, Liu, HY, Jia, XW, Liu, GD, Dong, XL, Zhang, J, Mao, ZQ, Chen, CT, Xu, ZY, Dai, X, Fang, Z & Zhou, XJ 2012, 'Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission', Chinese Physics Letters, vol. 29, no. 6, 067401. https://doi.org/10.1088/0256-307X/29/6/067401

Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission. / Liu, Shan Yu; Zhang, Wen Tao; Weng, Hong Ming; Zhao, Lin; Liu, Hai Yun; Jia, Xiao Wen; Liu, Guo Dong; Dong, Xiao Li; Zhang, Jun; Mao, Zhi Qiang; Chen, Chuang Tian; Xu, Zu Yan; Dai, Xi; Fang, Zhong; Zhou, Xing Jiang.

In: Chinese Physics Letters, Vol. 29, No. 6, 067401, 01.06.2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of cleaving temperature on the surface and bulk Fermi surface of Sr 2RuO 4 investigated by high resolution angle-resolved photoemission

AU - Liu, Shan Yu

AU - Zhang, Wen Tao

AU - Weng, Hong Ming

AU - Zhao, Lin

AU - Liu, Hai Yun

AU - Jia, Xiao Wen

AU - Liu, Guo Dong

AU - Dong, Xiao Li

AU - Zhang, Jun

AU - Mao, Zhi Qiang

AU - Chen, Chuang Tian

AU - Xu, Zu Yan

AU - Dai, Xi

AU - Fang, Zhong

AU - Zhou, Xing Jiang

PY - 2012/6/1

Y1 - 2012/6/1

N2 - High resolution angle-resolved photoemission measurements are carried out to systematically investigate the effect of cleaving temperature on the electronic structures and Fermi surfaces of Sr 2RuO 4. Unlike previous reports, which found that a high cleaving temperature can suppress the surface Fermi surface, we find that the surface Fermi surface remains obvious and strong in Sr 2RuO 4 cleaved at high temperature, even at room temperature. This indicates that cleaving temperature is not a key effective factor in suppressing surface bands. On the other hand, the bulk bands can be enhanced in an aged surface of Sr 2RuO 4 that has been cleaved and held for a long time. We have also carried out laser ARPES measurements on Sr 2RuO 4 by using a vacuum ultra-violet laser (photon energy at 6.994 eV) and found an obvious enhancement of bulk bands even for samples cleaved at low temperature. This information is important for realizing an effective approach to manipulating and detecting the surface and bulk electronic structure of Sr 2RuO 4. In particular, the enhancement of bulk sensitivity, along with the super-high instrumental resolution of VUV laser ARPES, will be advantageous in investigating fine electronic structure and superconducting properties of Sr 2RuO 4 in the future.

AB - High resolution angle-resolved photoemission measurements are carried out to systematically investigate the effect of cleaving temperature on the electronic structures and Fermi surfaces of Sr 2RuO 4. Unlike previous reports, which found that a high cleaving temperature can suppress the surface Fermi surface, we find that the surface Fermi surface remains obvious and strong in Sr 2RuO 4 cleaved at high temperature, even at room temperature. This indicates that cleaving temperature is not a key effective factor in suppressing surface bands. On the other hand, the bulk bands can be enhanced in an aged surface of Sr 2RuO 4 that has been cleaved and held for a long time. We have also carried out laser ARPES measurements on Sr 2RuO 4 by using a vacuum ultra-violet laser (photon energy at 6.994 eV) and found an obvious enhancement of bulk bands even for samples cleaved at low temperature. This information is important for realizing an effective approach to manipulating and detecting the surface and bulk electronic structure of Sr 2RuO 4. In particular, the enhancement of bulk sensitivity, along with the super-high instrumental resolution of VUV laser ARPES, will be advantageous in investigating fine electronic structure and superconducting properties of Sr 2RuO 4 in the future.

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DO - 10.1088/0256-307X/29/6/067401

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