000184085 001__ 184085
000184085 005__ 20180318102455.0
000184085 0247_ $$2doi$$a10.1103/PhysRevB.86.205133
000184085 022__ $$a1098-0121
000184085 02470 $$2ISI$$a000311715100007
000184085 037__ $$aARTICLE
000184085 245__ $$aUltrafast photodoping and effective Fermi-Dirac distribution of the Dirac particles in Bi2Se3
000184085 260__ $$aCollege Pk$$bAmer Physical Soc$$c2012
000184085 269__ $$a2012
000184085 300__ $$a5
000184085 336__ $$aJournal Articles
000184085 520__ $$aWe exploit time- and angle-resolved photoemission spectroscopy to determine the evolution of the out-of-equilibrium electronic structure of the topological insulator Bi2Se3. The response of the Fermi-Dirac distribution to ultrashort IR laser pulses has been studied by modeling the dynamics of hot electrons after optical excitation. We disentangle a large increase in the effective temperature (T*) from a shift of the chemical potential (mu*), which is consequence of the ultrafast photodoping of the conduction band. The relaxation dynamics of T* and mu* are k independent and these two quantities uniquely define the evolution of the excited charge population. We observe that the energy dependence of the nonequilibrium charge population is solely determined by the analytical form of the effective Fermi-Dirac distribution.
000184085 700__ $$0245077$$aCrepaldi, A.$$g188510$$uEcole Polytech Fed Lausanne, ICMP, CH-1015 Lausanne, Switzerland
000184085 700__ $$aRessel, B.$$uElettra Sincrotrone Trieste, Trieste, Italy
000184085 700__ $$aCilento, F.$$uElettra Sincrotrone Trieste, Trieste, Italy
000184085 700__ $$aZacchigna, M.$$uCNR IOM, Trieste, Italy
000184085 700__ $$aGrazioli, C.$$uElettra Sincrotrone Trieste, Trieste, Italy
000184085 700__ $$0240360$$aBerger, H.$$g104502$$uEcole Polytech Fed Lausanne, ICMP, CH-1015 Lausanne, Switzerland
000184085 700__ $$aBugnon, Ph.$$uEcole Polytech Fed Lausanne, ICMP, CH-1015 Lausanne, Switzerland
000184085 700__ $$0240038$$aKern, K.$$g105546$$uEcole Polytech Fed Lausanne, ICMP, CH-1015 Lausanne, Switzerland
000184085 700__ $$0241501$$aGrioni, M.$$g107920$$uEcole Polytech Fed Lausanne, ICMP, CH-1015 Lausanne, Switzerland
000184085 700__ $$aParmigiani, F.$$uElettra Sincrotrone Trieste, Trieste, Italy
000184085 773__ $$j86$$k20$$tPhysical Review B
000184085 909CO $$ooai:infoscience.tind.io:184085$$pSB$$particle
000184085 909C0 $$0252366$$pLSEN$$xU10152
000184085 909C0 $$0252170$$pLSE$$xU10153
000184085 917Z8 $$x105753
000184085 937__ $$aEPFL-ARTICLE-184085
000184085 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000184085 980__ $$aARTICLE