Discovery of Ĉ₂ rotation anomaly in topological crystalline insulator SrPb
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"givennames": "Wenhui",
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{
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"Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA."
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{
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{
"givennames": "Binbin",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"familyname": "Fu"
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{
"givennames": "Changjiang",
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"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "chjyi@iphy.ac.cn",
"familyname": "Yi"
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{
"givennames": "Shunye",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "gaoshunye@iphy.ac.cn",
"familyname": "Gao"
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{
"givennames": "Zhicheng",
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{
"givennames": "Dayu",
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{
"givennames": "Junzhang",
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"Swiss Light Source, Paul Scherrer Institute, Villigen, PSI, Switzerland."
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"familyname": "Ma"
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{
"givennames": "Ming",
"affiliations": [
"Swiss Light Source, Paul Scherrer Institute, Villigen, PSI, Switzerland."
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"email": "ming.shi@psi.ch",
"familyname": "Shi"
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{
"givennames": "Yaobo",
"affiliations": [
"Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China."
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"email": "huangyaobo@sinap.ac.cn",
"familyname": "Huang"
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{
"givennames": "Youguo",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "ygshi@iphy.ac.cn",
"familyname": "Shi"
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{
"givennames": "Zhijun",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "wzj@iphy.ac.cn",
"familyname": "Wang"
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{
"givennames": "Tian",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "tqian@iphy.ac.cn",
"familyname": "Qian"
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{
"givennames": "Hong",
"affiliations": [
"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China."
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"email": "dingh@iphy.ac.cn",
"familyname": "Ding"
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],
"title": "Discovery of \u0108\u2082 rotation anomaly in topological crystalline insulator SrPb",
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"references": [
{
"doi": "10.1038/s41467-021-22350-6",
"citation": "Wenhui Fan\uff0cnature communications 12:2052 (2021)",
"type": "Journal reference"
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"description": "Topological crystalline insulators (TCIs) are insulating electronic states with nontrivial topology protected by crystalline symmetries. Recently, theory has proposed new classes of TCIs protected by rotation symmetries \u0108_n, which have surface rotation anomaly evading the fermion doubling theorem, i.e., n instead of 2n Dirac cones on the surface preserving the rotation symmetry. Here, we report the first realization of the \u0108_2 rotation anomaly in a binary compound SrPb. Our first-principles calculations reveal two massless Dirac fermions protected by the combination of time-reversal symmetry T\u0302 and \u0108_2y on the (010) surface. Using angle-resolved photoemission spectroscopy, we identify two Dirac surface states inside the bulk band gap of SrPb, confirming the \u0108_2 rotation anomaly in the new classes of TCIs. The findings enrich the classification of topological phases, which pave the way for exploring exotic behavior of the new classes of TCIs.",
"status": "published",
"license": "Creative Commons Attribution 4.0 International",
"conceptrecid": "1133",
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"mcid": "2021.228",
"edited_by": 576,
"id": "1134",
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"doi": "10.24435/materialscloud:zx-nv"
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"revision": 12,
"created": "2021-12-02T14:59:10.288581+00:00"
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